Create an NSString for number in scientific notation from double?

Hi
Given a double, I want to create a string in scientific notation.
e.g for a double with a value of 123.456, I want the NSString to be "1.23456e+2" for entering in to a UITextField.
I've looked through the docs but can't find a formatter. (There is mention of "%a" being scientific format, but it produces hex output.)
Thanks for any clues.
Steve

Here, you should find what you are looking for:
http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/Strings/Ar ticles/FormatStrings.html#//apple_ref/doc/uid/20000943
http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/Strings/Ar ticles/FormatStrings.html#//apple_ref/doc/uid/20000943
http://developer.apple.com/mac/library/documentation/Cocoa/Reference/Foundation/ Classes/NSStringClass/Reference/NSString.html#//appleref/occ/clm/NSString/stringWithFormat:

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SELECT MDSYS.SDO_GEOMETRY(2003,3785,NULL,MDSYS.SDO_ELEM_INFO_ARRAY(1,1003,1),MDSYS.SDO_ORDINATE_ARRAY(-13426771.266146,5334024.8870015,-13425624.710722,5326534.0582305,-13412553.978887,5325922.5620044,-13412936.164029,5333719.1388884,-13426771.266146,5334024.8870015)).GET_WKT() FROM DUAL;
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POLYGON ((-1.3426771266146E7 5334024.8870015, -1.3425624710722E7 5326534.0582305, -1.3412553978887E7 5325922.5620044, -1.3412936164029E7 5333719.1388884, -1.3426771266146E7 5334024.8870015))
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SELECT SDO_UTIL.VALIDATE_WKTGEOMETRY(MDSYS.SDO_GEOMETRY(2003,3857,NULL,MDSYS.SDO_ELEM_INFO_ARRAY(1,1003,1),MDSYS.SDO_ORDINATE_ARRAY(-13426771.266146,5334024.8870015,-13425624.710722,5326534.0582305,-13412553.978887,5325922.5620044,-13412936.164029,5333719.1388884,-13426771.266146,5334024.8870015)).GET_WKT()) FROM DUAL;
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FALSE
Query:
SELECT SDO_UTIL.FROM_WKTGEOMETRY(MDSYS.SDO_GEOMETRY(2003,3785,NULL,MDSYS.SDO_ELEM_INFO_ARRAY(1,1003,1),MDSYS.SDO_ORDINATE_ARRAY(-13426771.266146,5334024.8870015,-13425624.710722,5326534.0582305,-13412553.978887,5325922.5620044,-13412936.164029,5333719.1388884,-13426771.266146,5334024.8870015)).GET_WKT()) FROM DUAL;
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ORA-29532: Java call terminated by uncaught Java exception: java.lang.RuntimeException
ORA-06512: at "MDSYS.SDO_UTIL", line 172
29532. 00000 - "Java call terminated by uncaught Java exception: %s"
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Hello jpmc26,
I am going to guess that most of us live our lives between the 180s and have not really noticed this before. I would call it a bug that needs an SR opened but is the bug on the coming or the going? If you look in the Simple Features 1.2.1 specification on pages 52 and 53 they clearly say that an "approximate numeric literal" of mantissa + E + exponent is valid. However, Oracle Spatial does not support the 1.2.1 spec. Rather they support something akin to the 1.1.0 specification. On pages 28 and 29 of that version there is no mention of approximate numeric literals as it first shows up in the 1.2.0 specification.
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-or-
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I guess its a policy decision on their side. Please update the posting as to what they say as I am curious about the topic.
Many folks have largely abandoned these java-based, outdated, OGC converters. Feel free to search the forum for complaints, myself being one of the complainers. When you said "a large amount of code already depends" on WKT, my first thought was that must be really slow. Writing your own SDO to WKT converter in PLSQL is really easy and I believe that's what most of us have done. The other direction is more challenging but doable - I need to rewrite mine but its works well enough for straightforward stuff.
Cheers,
Paul

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