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What does “#define _GNU_SOURCE” imply?
...URCE, but you should avoid defining it and instead define _POSIX_C_SOURCE=200809L or _XOPEN_SOURCE=700 when possible to ensure that your programs are portable.
In particular, the things from _GNU_SOURCE that you should never use are #2 and #4 above.
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How to prove that a problem is NP complete?
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edited Jun 20 at 9:12
Community♦
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answered Nov 27 '10 at 23:11
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Use of the MANIFEST.MF file in Java
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The content of the Manifest file in a JAR file created with version 1.0 of the Java Development Kit is the following.
Manifest-Version: 1.0
All the entries are as name-value pairs. The name of a header is separated from its value by a colon. The default manifest shows that it conforms to ver...
Array Size (Length) in C#
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b.GetLength(dimensionIndex)
will get the length of any given dimension (0-based indexing for the dimensions - so b.GetLength(0) is 3 and b.GetLength(1) is 5).
See System.Array documentation for more info.
As @Lucero points out in the comments, there is a concept of a "jagged array", which is re...
What's the difference between == and .equals in Scala?
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204
You normally use ==, it routes to equals, except that it treats nulls properly. Reference equal...
Android Webview - Webpage should fit the device screen
...calculate the scale that you need to use manually, rather than setting to 30.
private int getScale(){
Display display = ((WindowManager) getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
int width = display.getWidth();
Double val = new Double(width)/new Double(PIC_WIDTH);...
What's the difference between Invoke() and BeginInvoke()
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answered Oct 23 '08 at 12:40
Jon SkeetJon Skeet
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Confirm deletion in modal / dialog using Twitter Bootstrap?
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403
GET recipe
For this task you can use already available plugins and bootstrap extensions. Or yo...
When to use cla(), clf() or close() for clearing a plot in matplotlib?
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edited Jul 6 '18 at 2:08
spinkus
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answered Nov...
Limiting floats to two decimal points
...y a power of two so 13.95 will be represented in a similar fashion to 125650429603636838/(2**53).
Double precision numbers have 53 bits (16 digits) of precision and regular floats have 24 bits (8 digits) of precision. The floating point type in Python uses double precision to store the values.
For...