Formula string with boolean operations
Hello all,
I created sample logic to do Boolean operations with string.
Example:
(True or false) && False = false
False && True || false = false
Note: Syntax should not be any error (like wrong brackets/extra and/or.
Can anyone tell me is these is any way to optimize this code?
Munna
Attachments:
Formula String to Boolean operations.zip 30 KB
I figure there has to be a way to get to a formula node by way of scripting. So I started playing around.
See this.
Now this is just a VI that is basically operating on itself and shows the classes and properties do exist.
I think for your situation, you would need to dynamically create a new subVI. Run scripting code to generate a formula node, the inputs and output node to the formula, controls and indicators to link to those nodes along with the wiring connections. Then place the formula expression into the formula. Then dynamically call the VI (may need to save it first) to send it your values and return the output.
It seems like it would be a lot of work, but certainly doable.
Attachments:
Example_VI.png 34 KB
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Booleans should coerce to 0,1 when mixed with numeric operations
This is an extension of Darin's excellent idea and touches on my earlier comment there.
I suggest that it should be allowed to mix booleans with numeric operations, in which case the boolean would be "coerced" (for lack of a better word) to 0,1, where FALSE=0 and TRUE=1. This would dramatically simplify certain code fragments without loss in clarity. For example to count the number of TRUEs on a boolean array, we could simply use an "add array elements".
(A possible extension would be to also allow mixing of error wires and numerics in the same way, in which case the error would coerce to 0,1 (0=No Error, 1=Error))
Here's how it could look like (left). Equivalent legacy code is shown on the right. Counting the number of TRUEs in a boolean array is an often needed function and this idea would eliminate two primitives. This is only a very small sampling of the possible applications.
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A quick suggestion (I am not sure where to post this).
Wouldn't it be great if when replacing a boolean operation i.e. AND with its compound arithmetic equivalent (to add and extra input for example), the compound arithmetic could default to the correct mode. (It seems to default to OR)
I have never learned the arcane boolean symbols for AND and OR etc, I always have to go and double check to mode when dropping it down onto the block diagram.
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Hello!
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http://www.cisco.com/en/US/docs/voice_ip_comm/csbpvga/spa100-200/admin_guide/SPA100_AG_OL-25117.pdf
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*1xxxxxxxxxx<:@fwdnat.pulver.com:5082;uid=jsmith;pwd=xy z
Example 2:
*1xxxxxxxxxx<:@fwd.pulver.com;nat;uid=jsmith;pwd=xyz
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This is being done in Crystal 8 will all updates applied.
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DECLARE @Value int, @pf int, @FolderPath VarChar(MAX)
SET @Value = "portfolio_master"."portfolio_id"
SELECT @pf = "portfolio_master"."parent_id" FROM portfolio_master WHERE "portfolio_master"."portfolio_id" = @Value
SET @FolderPath = "portfolio_master"."portfolio_name"
WHILE @pf <> 0
BEGIN
SET @Value = @pf
SELECT @pf = "portfolio_master"."parent_id" FROM portfolio_master WHERE "portfolio_master"."portfolio_id" = @Value
SET @FolderPath = "portfolio_master"."portfolio_name" + ' > ' + @FolderPath
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Error in compiling SQL Expression:
Failed to retrieve data from the database.
Details: ADO Error Code: 0x80040e14
Source: Microsoft OLE db Provider for SQL Server
Description: Incorrect syntax near the keyword u2018DECLAREu2019,
SQL State: 42000
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Edited by: josevnz on Apr 14, 2009 12:35 PM
Edited by: josevnz on Apr 14, 2009 12:37 PMcamickr
Thats because the default render is a JLabel and it just displays the text from the toString() method of the Object in the table model.What I meant to say is that I expected the JCheckbox not a String representation of the boolean value.
Thats because a different renderer is used depending on the Class of data in the column. Look at the source code for the JTable class to see what the "default >renderer for the Boolean class" is. Then you can extend that or if its a private class then you will need to copy all the code and customize it.At the end I looked at the code and replicated the functionality I needed. I thought than maybe there was a way to avoid replicating the same logic all over again in order to implement this functionality. Good advice, though.
see you learned nothing from your last posting. This is NOT a SSCCE. 90% of the code you posted is completely irrelevant for the described problem. There is abosutelly no need to post the custom TableModel, because there is no need to use a custom TableModel for this problem. The TableModel has nothing to do with how a column is rendererd.The custom table model returns the type of the column (giving a hint to the renderer on what to expect, right?) and for the one that had a problem it says than the class is Boolean. That's why I mentioned it:
public Class getColumnClass(int columnIndex) {
// Code omited....
You also posted data for 4 columns worth of data. Again, irrelevant. Your question is about a single column containing Boolean data, so forget about the other columns.
When creating a SSCCE you don't start with your existing code and "remove" code. You start with a brand new class and only add in what is important. That way hopefully if you made a mistake the first time you don't repeat it the second time.That's what I did, is not the real application. I copy & pasted code in a haste from this dummy program on this forum, not the best approach as it gave the wrong impression.
Learn how to write a proper SSCCE if you want help in the future. Point taken, but there is NO need for you to be rude. Your help is appreciated.
Regards,
Jose. -
How can I convert a String into boolean?
I am facing difficulty in converting String into boolean.
For example, I have a few variable which i need user to input yes or no as the answer. But I uses string instead. Is there a way which i can ask them to input boolean directly?
Please advise...
credit = JOptionPane.showInputDialog("Enter Yes or No for Credit Satisfactory : ");
System.out.println("The answer for Credit Satisfactory : "+credit);
e_invtry=JOptionPane.showInputDialog("Enter Yes or No for inventry level");
System.out.println("The answer for Quantity Order : "+e_invtry);
Message was edited by:
SummerCoolThanks...but I don't get it....I tried to use your
suggestion but i got the message that " cannot find
symbol method
showConfirmDialog(java.lang.String,int)" ???
Please advise.
The code I use was :
int credit = JOptionPane.showConfirmDialog("Enter Yes
or No for credit satisfactory",
JOptionPane.YES_NO_OPTION);Well that was not the example I gave you.
JOptionPane has no method showConfirmDialog that receives a String and an int (exactly what the error message is telling you).
What was wrong with the version I showed you? -
Nonlinear Curve Fit LM Formula String in Labview 8
hi, guys. I write a vi which use Nonlinear Curve Fit LM Formula String. When I run it ,the program says "Syntax error of parser." and I don't know what's wrong with it, so help me,Please. By the way ,you can fill the arrays as you wish.
帖子被trinight在02-11-2006 07:51 PM时编辑过了
Attachments:
curve fitting.vi 16 KBYou MUST wire initial estimates for the parameters. Attached modification works just fine.
LabVIEW Champion . Do more with less code and in less time .
Attachments:
curveFittingMOD.vi 17 KB
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