Understanding how iPhoto works?

A couple of questions please...
I told iPhoto not to copy images from my source directory but it must being doing something similar as I can delete a photo in my source dir, and it will not be deleted from iPhoto. How is this working?
How does iPhoto keep in sync with my source directory? If I add another sub-folder to it with new photos do I need to manually import or something or will iPhoto look to it to see what's changed?
Thanks,
Steve

As far as I understand now, when I want to transfer photos directly from my camera into iPhoto, I should by all means use a managed library. Correct?
Yes. It's the only way to use iPhoto to transfer the photos from the camera directly.
Just an FYI
There are many, many ways to access your files in iPhoto:
*For Users of 10.5 and later*
You can use any Open / Attach / Browse dialogue. On the left there's a Media heading, your pics can be accessed there. Command-Click for selecting multiple pics.
Uploaded with plasq's Skitch!
(Note the above illustration is not a Finder Window. It's the dialogue you get when you go File -> Open)
You can access the Library from the New Message Window in Mail:
Uploaded with plasq's Skitch!
*For users of 10.4 and later* ...
Many internet sites such as Flickr and SmugMug have plug-ins for accessing the iPhoto Library. If the site you want to use doesn’t then some, one or any of these will also work:
To upload to a site that does not have an iPhoto Export Plug-in the recommended way is to Select the Pic in the iPhoto Window and go File -> Export and export the pic to the desktop, then upload from there. After the upload you can trash the pic on the desktop. It's only a copy and your original is safe in iPhoto.
This is also true for emailing with Web-based services. However, if you're using Gmail you can use iPhoto2GMail
If you use Apple's Mail, Entourage, AOL or Eudora you can email from within iPhoto.
If you use a Cocoa-based Browser such as Safari, you can drag the pics from the iPhoto Window to the Attach window in the browser.
*If you want to access the files with iPhoto not running*:
For users of 10.6 and later:
You can download a free Services component from MacOSXAutomation which will give you access to the iPhoto Library from your Services Menu. Using the Services Preference Pane you can even create a keyboard shortcut for it.
For Users of 10.4 and later:
Create a Media Browser using Automator (takes about 10 seconds) or use this free utility Karelia iMedia Browser
Other options include:
1. *Drag and Drop*: Drag a photo from the iPhoto Window to the desktop, there iPhoto will make a full-sized copy of the pic.
2. *File -> Export*: Select the files in the iPhoto Window and go File -> Export. The dialogue will give you various options, including altering the format, naming the files and changing the size. Again, producing a copy.
3. *Show File*: Right- (or Control-) Click on a pic and in the resulting dialogue choose 'Show File'. A Finder window will pop open with the file already selected.
You can set Photoshop (or any image editor) as an external editor in iPhoto. (Preferences -> General -> Edit Photo: Choose from the Drop Down Menu.) This way, when you double click a pic to edit in iPhoto it will open automatically in Photoshop or your Image Editor, and when you save it it's sent back to iPhoto automatically. This is the only way that edits made in another application will be displayed in iPhoto.
Regards
TD

Similar Messages

Trying to understand how iPhoto keeps track of pictures...

I am trying to understand how iPhoto stores & organizes pictures.
I moved JPEGs from a portable drive to my hard drive, set iPhoto's preferences to not copy pictures when importing them, then imported them. Unfortunately, all pictures from a certain import has duplicated in iPhoto.... so I "moved to trash" all pictures from that import and tried importing again since the JPEGs were still where I moved them to. When importing, it said they were duplicated .
I am confused. If I "move to trash", I assumed it got rid of whatever index (and preview cache) to that particular JPEG. I was actually surprised it did not delete the actual JPEG but I'm ok with that.
Can someone help explain this behavior?
Thanks
-Ed

iPhoto is a relational database program
In the strongly recommended managed library (you have chosen to ignore this recommendation and use a referenced library) imported photos are copied to the iPhoto library and stored in the originals folder, a thumbnail jPEG is created and places in the data folder and when any modification is made (including autorotation) a modified version of the photo is created and placed in the modified folder. iPhoto updates its database entries to reflect everything it does.
It is critical that you do not make any modifications of any sort to the content or structure of the iPhoto library - doing so is likely to corrupt the library and cause you to lose data.
When you use the referenced mode which you are doing (and which is not recommended) you are taking total responsibility for the original photos which included not moving or modifying them while iPhoto is referencing them
Unfortunately, all pictures from a certain import has duplicated in iPhoto.... so I "moved to trash" all pictures from that import
Did you do this with the iPhoto trash? or did you use the finder to modify the contents of the iPhoto library.
If I "move to trash", I assumed it got rid of whatever index (and preview cache) to that particular JPEG. I was actually surprised it did not delete the actual JPEG but I'm ok with that.
again - iPhoto trash or finder trash. If you move a photo to the iPhoto trash and empty it all traces of that photo in the iPhoto library will be removed - nothing will be done to any file outside of the iPhoto library -- ever
LN

Need a Little Help with Understanding How Layers Work in PSE

I have PSE version 5 and I am using it on a PC with Windows XP.
As I get more into editing photos, I am enjoying it, but confusion is also starting to set in. My question is about layers. When I go to edit a photo for web/email use only, I start by resizing it to 72 ppi and then reducing the pixel dimensions quite a bit. Then after that I normally go through this process of editing the photos by using normally about three different commands. One is Levels, then I may go to Shadows/Highlights, and then my last command is always sharpening. I used to do this all on one layer, but then finally learned to put each one of these editing features on their own layer so I can make changes/deletions without too much trouble.
When I started doing the separate layers, I was just making a copy of the background layer each time and then touching that particulay layer up with Levels, Sharpen or Shadows/Highlights. But I noticed that depending on the order in which the layers were placed, some changes would be obscured. If I put the Levels layer on top, and then the Sharpen layer and the Shadows/Highlight layer below that, the sharpen effect and the shadows/highlights effects were no longer there. I could only see the levels effect. The photo was still not sharp and so on. If I put the Sharpen level on top, then the photo showed the sharpen effects, but now the Levels and Shadows/Highlights effects were no longer visible.
So then I started to make a copy of the background initially, do a levels adjustment here, then, instead of making a copy of the original background layer again, I would make a copy of the layer that now has the levels changes on it. Then do the sharpen effect on this layer. This way I had all the changes on one layer as long as I put that layer as the top layer. But then I realized that I once again fI didn't have a layer with only one fix on it. Finally, I started to use an adjustment layer for Levels, put this as the top layer, make a copy of the background layer, do shadows/highlights, copy background layer again, do sharpen, and this seems to work a little better. But even with this way, depending on what order I place the sharpen and shadows/Highlights layers, one of them still seems to get obscured by the layer above it.
Can someone help me to understand how layers work in this regard. I am obviously a little confused here.
Thanks,
Lee

You really aren't working efficiently. First of all, do your editing on a full sized version of the photo, since you have more data for PSE to work on and will get better results. Use save for web to make your web/email copy when you are totally done. You can resize it down on the right side of the save for web window.
Duplicating a regular layer makes an opaque layer that obscures the layers below it. It's best to start off by not working on your original image, so that you don't have to worry if you mess up. If you're working on a copy, you can work right on the background layer, or only duplicate the layer once and apply your changes to that. So you'd apply both shadows/highlights and sharpening to the same layer.
Finally, you should use an adjustment layer for levels. Layer>New Adjustment Layer>Levels. This will put levels on a transparent layer above your image, but you will need to click the layer below it to get back to a pixel layer to apply other changes (you can't sharpen an adjustment layer, for example).

How works lync when I made a video conferences with someone in my same building?I want to understand how lyncs works, when I made video conferences with someone in my same building, if my call go to to server and then go to the person I´m calling. Or if L

I want to understand how lyncs works, when I made video conferences with someone in my same building, if my call go to to server and then go to the person I´m calling.
Or if Lync realizes that we are in the same building so it never leaves, so it don’t generate traffic. My concern is the bandwidth consumption.
Please a I need the information.
thanks

In addition, you can refer to the following link about the media connection in different scenarios:
http://www.shudnow.net/2010/12/06/lync-server-2010-port-ranges-and-audiomedia-negotiation/
Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make
sure that you completely understand the risk before retrieving any suggestions from the above link.
Lisa Zheng
TechNet Community Support

I want to understand how crypto works.

Hi, I want to understand how crypto works and all. where i can start with. i really dont know anything about crypto. i need to understand how DC and keys and algorithims work together and how they work. pls suggest me where and with what i can start.

Since you asked on the Java Cryptography forum, I would recommend beginning with this book:
Beginning Cryptography with Java
David Hook
ISBN: 978-0-7645-9633-9
http://www.wrox.com/WileyCDA/WroxTitle/productCd-0764596330.html

Explanation of how Iphoto works.

Can someone please explain to me how iPhoto works as far as organizing photos and duplicating/converting photos. I have a bunch of photos in my photo file, and I would like to keep them all in one place (via iPhoto), but when I have experimented with it, Ive knowticed that dragging photos into iphoto, doesnt move the file at all, it just duplicates it, and then hides the duplication?, it also changes the image into a smaller file and creates "thumbnails???" I'm so confused. Can someone tell me what im supposed to do.

Hi Derek,
Here is some more info to add to PhillyPhans great answer.
--First thing to know and remember is this...Do not drag any images, folder of images into the iPhoto Library in the Finder. Images have to be imported into iPhoto within the application. Do not scan images and save them into the iPhoto Library folder in the Finder. Save them to another location such as the Pictures folder or even the desktop. You can then import them into iPhoto.
If you have already put files/folders in the iPhoto Library folder in the Finder then you will also find out that if you try to import them into iPhoto you will get an error message. No worry, just drag them to the desktop and import from there.
--All images that you import are shown in the library view. You can choose how you want to view, by rolls, by date, by rating, etc. When you put images in an Album, slideshow, book, etc, you are actually just putting pointers to those images in the library. You are not adding more images. If you delete an image from the Album it will still be in the library. If you delete an image from the library it is deleted from iPhoto's database (the iPhoto Library folder in the Finder) and your hard drive ONLY after you empty iPhoto's trash. (unless you have it backed up somewhere else)
--You have a folder of images on your hard drive and want to import them into iPhoto. Drag the folder of images into an open iPhoto Library window and the folder of photos will be copied into the library, resulting in a new roll with the name of the folder. You now have two copies of those photos, the ones in iPhoto's database and the ones on your desktop. You can keep the ones on your desktop that you just imported as backup or you can delete that folder. You can also drag a folder of photos into an empty space in the source column and a new roll and album will be created at the smae time for those images in the folder. The album will have the same name as the folder you dragged into the source column.
-- you scan a picture/pictures and save it in a folder. You cannot scan directly into iPhoto or the iPhoto Library folder in the Finder.
You want all your photos in iPhoto so you import them into iPhoto.
Now you have two copies of that picture/pictures, so you can delete the originals that were in the scanned folder and keep the one/ones that were imported into iPhoto.
-- You download pictures from your camera into iPhoto.
There is now one copy of each of the pictures. (DO NOT HAVE IPHOTO DELETE THE IMAGES FROM YOUR CAMERA! DELETE THEM MANUALLY WITH THE CAMERA-if something goes wrong with the import and they are never imported and then they are deleted from the camera you might end up losing those images)
--You want to change something about a picture you imported, such as
cropping it or changing the size, or changing the orientation.
Once you do that to a picture, you now have two copies of the picture
in iPhoto, the original and the edited one. The edited one will be in the library organize view. The original is packed away in an Original folder in your iPhoto Library folder under the date of the roll. You can always revert to the original by control clicking on the photo and choose "revert to orginal" You will not have this choice if you used iPhoto Diet to get rid of the Originals.
(a quick note on cropping within iPhoto...when you are in edit mode, you automatically will be in the crop mode with cross hairs to highlight the crop area. To finish cropping you must click the crop button and then go back to library view and your cropped picture will be there.
--You want to use Photoshop or another graphic program to edit a picture in your iPhoto library.
You can open up prefs for iPhoto and choose
For iPhoto 5--"when double clicking on
photo" ..do" choose "other" and select Photoshop. Now you can edit all
pictures in your iPhoto library in PhotoShop by double clicking. If you save the photo with the same name and as a flattened file it will be saved right into iPhoto and you will see the changes. If you don't want to save it into iPhoto then do a "save as" and save to the desktop. You will then have the original photo still in iPhoto and your new edited photo on the desktop.
For iPhoto 6 (from the Apple Help Menu)-Have you ever used PS as the external editor set up within iPhoto Prefs?
From the iPhoto Help menu;
"Choosing what happens when you click the Edit button
When you want to edit a photo, you can have the photo open in iPhoto's edit view, in a separate window, in full-screen view, or in another application.
To choose a preference:
Choose iPhoto > Preferences.
Click General at the top of the Preferences window.
Under Edit Photo, select one of the following options:
"In main window" opens the photo in the main viewing area.
"In separate window" opens the photo in a separate window.
"Using full screen" opens the photo in full-screen view.
"In application" opens the photo in another application you choose.
To open a photo in its own window when "Main window" is selected, press the Option key when double-clicking the photo.
To open a photo in edit view when "Separate window" is selected, press the Option key when double-clicking the photo.
Note: Any video clip you imported into iPhoto will always open in QuickTime Player when you double-click it."
And...
"Editing photos in another application
You can do many editing tasks in iPhoto, such as rotating and cropping a photo, changing a color photo to black and white, adjusting exposure and contrast, and reducing red-eye. If you want to make other changes to a photo, you can open it in another image-editing application, such as Adobe Photoshop.
To edit photos in another application:
Set your preferences to open photos in another application when you double-click them or click the Edit button. (See Related Topics below.)
Double-click the photo to open it in the application.
Edit the photo and save it using the same name and file format.
The changes you made to the photo will be visible when you return to iPhoto.
IMPORTANT: When you double-click a RAW-format photo, iPhoto creates a copy of the photo in JPEG format, which opens in the other application. To edit the photo in its original RAW format, drag the photo from the iPhoto window to the Finder, and then use the other application to open it. (If you previously used iPhoto to edit the RAW photo, select the photo and choose Photos > Revert to Original before dragging it to the Finder. This way, you can edit the photo using its RAW data in the other application.) If you want to import the photo back into iPhoto, you must first save it as a JPEG or TIFF file."
--Or, with iPhoto open, you can drag a picture from the library window
to your desktop (you see a + sign on the pic you are dragging). You now
have two of the same picture, one in the iPhoto library and one on your desktop. You can open up the one on your desktop in any graphic program and work on it. The one in iPhoto stays the same. You can also share/export the picture/pictures to your desktop or folder to work on them or do batch processing, etc. You will still have the originals in your iPhoto Library.
--Or, you can open up the ~/Pictures/iPhoto Library/folders and option drag any
picture out of the folder to your desktop. Notice that you will see a plus sign while dragging the photo. This is copying the file to your desktop
I would advise anyone not to do this as they might forget to use the option key and drag the photo out. Next time you open iPhoto the photo will be missing.
-The one option you will not find within iPhoto is to resize photos. iPhoto wants you to keep all full size images within iPhoto to give you the best size for printing or using for other applications. You can however go to Share>export (for iPhoto 5) or File>export (for iPhoto 6) and choose the naming scheme, input the dimensions and export to the desktop to use for uploading to a web space or emailing.
--to email a photo set up your email client in iPhoto Preferences. Once done, just select a photo/photos and hit the email icon in the toolbar.
If you use a web based email, then you need to export the photo to the desktop and upload it from there.
Two Apple kbs for you to read
Don't tamper with files in the iPhoto library folder
About the iPhoto Library folder
Don't forget that in Library view you can Control click on any picture and get a contextual menu with many options. One is to revert to original.
For more help and information you can go to the Help menu wiithin iPhoto and input your search term in the search bar, then hit the "enter" key on the keyboard or just browse through the topics and categories.
You can also go to the iPhoto Support site and browse the topics there including the tutorials.
iPhoto Support

Not understanding how Wifi Works

Good morning all, so I'm not understanding how Wifi works on the 3GS. It seems to behave differently then on the 3G. If I send a video to some one and hit the sleep awake button it never goes through. It seems to only send it if I keep the screen active, and I'm not understanding how keeping wifi on drains the battery if everytime I hit the sleep button it disconnects it. It's kind of annoying, because before you could shoot off an email and it would go right through. I have noticed though that if it's on 3G it does go through. Has any one else noticed this? Thanks!

I notice sometimes when I am connected to WiFi that after I wake up the phone it takes a couple seconds to reconnect to WiFi so it does seem like the phone turns the WiFi off at some point while sleeping or at least goes into some sort of standby maybe. I don't think I have had an issue of it turning off after you hit sleep until it was done sending though. I would think that if the WiFi does turn off while asleep that it would have a sleep time after a certain amount of inactive time and not the second the screen is off.
I'm interested in finding this out as well. I havent had this issue but I do send a lot of large attachments and may need to know this for future reference.
Message was edited by: Ray Golob

I need help understanding how this works. AS 2.0

Its my first time here and i only started learning flash today. I aint too great with maths and i was showed this piece of code that makes a triangles point follow the cursor. It involved mathimatical things ( which i aint so great at) and the guy said "You dont need to know how it works, just how to use it." well i copied his code and it worked, but i have no idea how to use it in other rotation apart from the one he taught us. I dont even understand how to redo his code i saved it to a word document and anytime i wanted to make something rotate something in that fashion i would refer to that. But i dont want to have to do that, i want to know how to use it, dont have to understand it, but use it for other rotation matters. If you are going to help, please try to be a bit simmple i explaining it, cause im new. Dont get me wrong i aint thick but i can find it a bit hard to follow some things, that is i my current problem.
here is the rotation code:
onEnterFrame = function()
hero._rotation = getmouse(hero);
getmouse = function(mc:MovieClip):Number
dy = _ymouse-mc._y;
dx = _xmouse-mc._x;
rad = Math.atan2(dy,dx);
rotate = rad*180/Math.PI
return rotate+90
also if it helps, here is the video i was watching: http://www.youtube.com/watch?v=w3OfrpbNhHs
please if you can, explain how the entire thing works.
thanks for any help given in advance.

Hi,
Here's a short primer. It may not be sufficient but here goes.
1st, move the closing bracket at the end and put it on the third line. This makes the code more efficient
onEnterFrame = function(){                               // this causes Flash to repeatedly
                                                                          execute the next line at the
                                                                          frame rate you selected
                                                                          for your document
       hero._rotation = getmouse(hero);               // this tells Flash to rotate a
                                                                          movie clip (named hero) based
                                                                          on the function getmouse()
};                                                                     // putting the }; here makes the
                                                                          code more efficient and readable
getmouse = function(mc:MovieClip):Number{   // This is the function called with
                                                                         mc referring to hero that was
                                                                         passed from the second line.
     dy = _ymouse-mc._y;                                // dy means delta y which subtracts
                                                                        the y position of the movieclip
                                                                        from the mouses y position
     dx = _xmouse-mc._x;                               // dx = delta x (same as above line
                                                                        but on the x axis)
                                                                     // once you have the x and y sides
                                                                        you male a triangle.
                                                                        Now use trig to find the angle
     rad = Math.atan2(dy,dx);                           // the computer works in radians
                                                                        the arc tangent atan2 will give the
                                                                        angle in radians
     rotate = rad*180/Math.PI                            // you want to convert the radians to
                                                                        degrees, that's what this line does
     return rotate+90                                         // this returns the value of rotate back
                                                                        to the calling function in line 2.
                                                                        the +90 determines which part
                                                                    // of the hero movie clip is facing the
                                                                       mouse.
If you put the mouse cursor over any of the green reserved words above in the Actions panel you will get a desctription of what these do.
hope that helps.

Trying to understand how beans work.

I can't seem to figure out how beans work. Or more specifically how to target different parts of a bean. I think not knowing the terminology is a big part of this confusion too.
For instance. I have a jsp file and a bean. the jsp has a form input that submits to itself. the bean gets the info that was typed in and displays is in the <%= etcetc %> tag. Now, what im trying to do is also submit that value to my mysql db. This has created numerous problems for me. For one, i don't really know how to check if it's working (other than actually looking at the DB table). The other problem is how do i target that part of the bean to tell it to do that function (again, the terminolgy eludes me).
I'll post all of the code. There is a good chance that the DB code wont work. I'm really just hoping someone can explain to me
how i call the DB function from the JSP file.
I mean, is this even possible? Or do i need seperate beans for everything?? It seems kind of silly to not be able to do this.
ok, so here is the code.
JSP:

<%@ page errorPage="myError.jsp?from=hello.jsp"%>
<jsp:useBean id="simpleBean" scope="page" class="jspbook.ch3.simpleBean"/>

<jsp:setProperty name="simpleBean" property="fname"/>
<html>
<head>
     <title>Hello</title>
</head>
<body>
<center>
     <b><%= simpleBean.welcomeMsg() %></b>
</center>
<table align="center">
     <tr>
          <td>
               <form name="sdfsdf" action="test.jsp" method="post">
               <input type="text" name="fname" value="">
               <input type="submit" name="submit" value="submit">
               </form>
          </td>
     </tr>
</table>
</body>
</html>and here is the bean
package jspbook.ch3;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
public class simpleBean implements java.io.Serializable {
   private String emplid;
   private Connection con = null;
   private ResultSet rs = null;
   private PreparedStatement st = null;
   /* Member Variables */
   private String lname;
   private String fname;
public simpleBean()
        try
          Class.forName("org.gjt.mm.mysql.Driver");
          Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/stm?user=root&password=");
    catch(Exception e)
          System.out.println(e.getMessage());
      /* Initialize bean properties */
    setLname("");
    setFname("");
/* Accessor Methods */
public String getLname() {
    return lname;
public void setLname(String _lname) {
    lname = _lname;
public String getFname() {
    return fname;
public void setFname(String _fname) {
    fname = _fname;
/* Display personalized message */
public String welcomeMsg() {
    return "Hello " + fname + " " + lname +
      ", welcome to the wonderful world of JavaBeans!";
      public void insert()
       try
            String s1="insert into commstream (commTitle) values('"+fname+"')";
            st = con.prepareStatement(s1);
            st.executeUpdate();
            st.clearParameters();
            st.close();
       catch(Exception m)
}So there it is. If someone can explain the fundamentals to me, that would be great. What would also be great is if someone can make the above code work :)
I've checked online tuts/specs on this, but to be honest im just not grasping it.

iPhoto is a relational database program
In the strongly recommended managed library (you have chosen to ignore this recommendation and use a referenced library) imported photos are copied to the iPhoto library and stored in the originals folder, a thumbnail jPEG is created and places in the data folder and when any modification is made (including autorotation) a modified version of the photo is created and placed in the modified folder. iPhoto updates its database entries to reflect everything it does.
It is critical that you do not make any modifications of any sort to the content or structure of the iPhoto library - doing so is likely to corrupt the library and cause you to lose data.
When you use the referenced mode which you are doing (and which is not recommended) you are taking total responsibility for the original photos which included not moving or modifying them while iPhoto is referencing them
Unfortunately, all pictures from a certain import has duplicated in iPhoto.... so I "moved to trash" all pictures from that import
Did you do this with the iPhoto trash? or did you use the finder to modify the contents of the iPhoto library.
If I "move to trash", I assumed it got rid of whatever index (and preview cache) to that particular JPEG. I was actually surprised it did not delete the actual JPEG but I'm ok with that.
again - iPhoto trash or finder trash. If you move a photo to the iPhoto trash and empty it all traces of that photo in the iPhoto library will be removed - nothing will be done to any file outside of the iPhoto library -- ever
LN

How much does this cost? & I still can't understand how this work

How much does this cost? & I still can't understand how this work

Hello mkopti,
ePrint is a free feature include on most of our wireless printers that are e-all-in-one enabled. It allows you to register your printer on HP's website http://www.eprintcenter.com and create an account. Once an account has been created you can enable the web services feature, after connecting to a valid network with internet access, which will print off a registration code you can use to add the printer to your account and customize an email address for the printer. This allows you to print to the printer from virtually anywhere simply by sending an email to the printers email address and when it is received it will print.
Most of these printers are also Airprint enabled meaning you can print locally from the same network on the iPad, iPod, and iPhone (version 4.3.2 and higher) by using the built in "Print" command in the idevices.
If you have any other questions or need clarification feel free to reply to this post and I will try to answer any questions you have.
If I have solved your issue, please feel free to provide kudos and make sure you mark this thread as solution provided!
Although I work for HP, my posts and replies are my own opinion and not those of HP.

Trying to understand how BTRFS works

Hello,
I read most if not all of the articles, presentations and podcasts about Btrfs at https://btrfs.wiki.kernel.org/index.php/Main_Page and other sites. All is very nice. I had to read some of the information a couple of times though to more or less understand and I'm not sure if I really do.
I'm trying to explain BTRFS in my own words, but wonder if it is correct. What about the following:
The storage space of a BtrFS file system is comprised of file data blocks and metadata blocks. The BtrFS metadata is organized in a B-tree fashion and describes the version and location of data on disk. The BtrFS file system uses a copy-on-write (CoW) storage strategy. An existing file under BtrFS is never initially overwritten. Instead, when modifying a file, data blocks are copied, modified and written anywhere on disk according to metadata to prevent overwriting of data required by snapshots. When a file under Btrfs is modified, data is not necessarily overwritten. Modified data blocks of files can be written anywhere on disk according to metadata and requirement to maintain existing snapshots. A snapshot does initially not impose additional storage space until data blocks are modified.
Is this correct? And if not, where am I wrong please?
Thanks!
Edited by: Dude on Oct 16, 2012 10:38 AM

Dude wrote:
Thanks for the feedback. Actually that's one of the parts I'm not sure if I understand it correctly. It is my understanding that Btrfs works on the data block level, which I think is the smallest amount of data that can be allocated. Similar to Oracle database. So in order to modify data, the whole block needs to be written. For example, let's say I change a the word "teh" to "the" in a file. Doesn't it have to read the whole block, modify the content, and check the metadata before writing the complete block?Yes. But it does tight packing, so it probably wouldn't write an entire block out for "the" -- it would just squash it into one of the leaves of the b-trees.

I just dont understand how to work photo shop HELP ME

my mom bought this for me and im reading the directions and trying to figure out how it works i just dont get it at all!!! i dont know why, im good at using computers i just nvr grasped the concept of how to work this
if you have a helpful hint please comment thank you

Adobe TV has a whole selection of free videos that should help you to get started.
http://tv.adobe.com/show/learn-photoshop-elements-8/
You can also find lots of videos using Google...
http://www.google.com/search?hl=en&client=opera&hs=6js&rls=en&q=Photoshop%20Elements%208&u m=1&ie=UTF-8&tbo=u&tbs=vid:1&source=og&sa=N&tab=wv
or YouTube
http://www.youtube.com/watch?v=F1ZEEPNaqQ0
If you just search for Photoshop Elements (without limiting it to Photoshop Elements 8 as I did) you will get even more results...most if not all things should work in version 8. (Version 8 user interface will look different and may have additonal features as each version gets new goodies.)

I really dont understand how this works

alright first off this isnt for a school assignment so please dont feel guilty about "giving it away"
alright so this has to do with something called gridworld, if you ever seen it you know what it is, if you havents its basiclly a java built world that has bugs, rocks, flowers, and other things.
(here is a video showing the basics of gridworld http://www.youtube.com/watch?v=ZnWGOT5Bd2E&feature=related). i program in JCreator btw not greenfoot.
alright getting to the point i have the code for a bug someone build called a "chameleoncritter". what the bug does is change colors depending on what it is next to, so if it is next to a pink rock it changes pink, ive been reading the code and can honestly not figure out how this method changes its color depending on what it is next to. here is the code
* AP(r) Computer Science GridWorld Case Study:
* Copyright(c) 2005-2006 Cay S. Horstmann (http://horstmann.com)
* This code is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation.
* This code is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* @author Chris Nevison
* @author Barbara Cloud Wells
* @author Cay Horstmann
import info.gridworld.actor.Actor;
import info.gridworld.actor.Critter;
import info.gridworld.grid.Location;
import java.util.ArrayList;
* A <code>ChameleonCritter</code> takes on the color of neighboring actors as
* it moves through the grid. <br />
* The implementation of this class is testable on the AP CS A and AB exams.
public class ChameleonCritter extends Critter
     * Randomly selects a neighbor and changes this critter's color to be the
     * same as that neighbor's. If there are no neighbors, no action is taken.
    public void processActors(ArrayList<Actor> actors)
        int n = actors.size();
        if (n == 0)
            return;
        int r = (int) (Math.random() * n);
        System.out.println(n);
        Actor other = actors.get(r);
        setColor(other.getColor());
     * Turns towards the new location as it moves.
    public void makeMove(Location loc)
        setDirection(getLocation().getDirectionToward(loc));
        super.makeMove(loc);
}if anyone can explain to me how this works it would be excellent.
one more thing, here is a link to the gridworld api (list every method and class and its function).
http://www.horstmann.com/gridworld/javadoc/
Edited by: vouslavous on Apr 17, 2009 8:51 PM

public void processActors(ArrayList<Actor> actors)
        int n = actors.size();
        if (n == 0)
            return;
        int r = (int) (Math.random() * n);
        System.out.println(n);
        Actor other = actors.get(r);
        setColor(other.getColor());
}Randomly selects a neighbor and changes this critter's color to be the same as that neighbor's. If there are no neighbors, no action is taken.
Mel

I have, by mistake, caused all my photos in a large book I am making to revert to the original. This after a long time spent editing etc. I don't understand how iPhoto library works. I have aTime Machine. I also have an EHD backed up 2 days ago.

Yosemite 10.10.3
i am making a photo book with iPhoto, had already started it when Photos superseded iPhoto so I carried on. Have spent a lot of time on it, it's a large book.
BY mistake I caused all the photos to revert to original.
I have Time Machine and I backed up Photolibrary to EHD 2 days ago.
BUt it I don't understand iPhotos library. If I replace existing library from Time Machine, all my projects, albums etc. be there as they were before my BIG mistake?
I have read that Time Machine is not suitable for back ups of iPhoto so should I try to use my EHD? In finder it just shows 'iPhotoLibrary'. So the same question arises - does the Library incorporate all my projects and the work I've done on them up to the date of back up?
I would be so grateful for help and advice

See my response to your duplicate post.

How do I learn how iPhoto works and how to use it?

It took me a long, long time to master (my definition of master will differ from yours) iPhoto 9 but 11 has me stymied. Where is the tutorial for 11? Also how do I disable faces and places permanently? Thanks

Welcome to the Apple Discussions. The only way to disable Faces is a workaround that I worked out. Here's how:
1 - open the library like this.
2 - in the Database folder move this file to the Trash: Faces.db.
3 - close the package/folder and launch iPhoto. Close it after a moment.
4 - open the package, find the new version of the file and lock it via the Info window for the file.
Click to view full size
5 - while viewing the contents of the package type Command+F to start a search.
6 - set the criteria of the search to: Kind is Image and Name Contains "face".
7 - select all of the files in the search results window and drag to the Trash.
8 -close the package and launch iPhoto.
You will get the faces spinning wheel as it tries to index the library the first time it's opened but it won't be able to write to the database file if you should try to add a face and won't create any new jpeg faces files.
*Of course make a backup of your library before trying this and no guarantee implied*.
Be sure to send a feature request for a way to disable Faces to Apple via http://www.apple.com/feedback/iphoto.html.
Also this Apple tutorial page may help: http://www.apple.com/support/iphoto/
as well as these videos: http://www.apple.com/ilife/video-showcase/
OT

Understanding how iPhoto works?

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