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php is null or empty?
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@Robert: A string not starting with digits is converted to 0 when cast to a string: codepad.org/qi40SG3E. So (int)"php" == 0.
– Felix Kling
Nov 27 '13 at 21:58
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How can I convert an image to grayscale via the command line? [closed]
How can I use sips , imagemagic , or another tool to convert an image to black and white (grayscale) via the command line?
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Convert a python dict to a string and back
...back into the dictionary object when the program is run again.
How would I convert a dictionary object into a string that can be written to a file and loaded back into a dictionary object? This will hopefully support dictionaries containing dictionaries.
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How do I convert a PDF document to a preview image in PHP? [closed]
...n conjunction with GhostScript. Run the ghostscript command with exec() to convert a PDF to JPG, and manipulate the resulting file with imagecreatefromjpeg().
Run the ghostscript command:
exec('gs -dSAFER -dBATCH -sDEVICE=jpeg -dTextAlphaBits=4 -dGraphicsAlphaBits=4 -r300 -sOutputFile=whatever.jp...
Compare two dates with JavaScript
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The easiest way to compare dates in javascript is to first convert it to a Date object and then compare these date-objects.
Below you find an object with three functions:
dates.compare(a,b)
Returns a number:
-1 if a < b
0 if a = b
1 if a > b
NaN if a or b is an illegal da...
How do I convert an NSString value to NSData?
How do I convert an NSString value to NSData ?
11 Answers
11
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Convert UTC datetime string to local datetime
I've never had to convert time to and from UTC. Recently had a request to have my app be timezone aware, and I've been running myself in circles. Lots of information on converting local time to UTC, which I found fairly elementary (maybe I'm doing that wrong as well), but I can not find any informat...
What's the Linq to SQL equivalent to TOP or LIMIT/OFFSET?
...d to a property name.
See http://blogs.msdn.com/vbteam/archive/2008/01/08/converting-sql-to-linq-part-7-union-top-subqueries-bill-horst.aspx for more detail.
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Convert line-endings for whole directory tree (Git)
...esn't specify what its behavior is if you invoke it on binary files. If it converts CRLF in binary files, it will corrupt them. See my answer for a safer, albeit longer alternative.
– toolbear
Sep 23 '11 at 19:11
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error: ‘NULL’ was not declared in this scope
..., which is implemented in GCC since version 4.6. nullptr is not implicitly convertible to integral types, so it can be used to disambiguate a call to a function which has been overloaded for both pointer and integral types:
void f(int x);
void f(void * ptr);
f(0); // Passes int 0.
f(nullptr); //...