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What does the line “#!/bin/sh” mean in a UNIX shell script?
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143
It's called a shebang, and tells the parent shell which interpreter should be used to execute t...
Why does Math.round(0.49999999999999994) return 1?
...Java 7 no longer mandates this broken implementation.3
The problem
0.5+0.49999999999999994 is exactly 1 in double precision:
static void print(double d) {
System.out.printf("%016x\n", Double.doubleToLongBits(d));
}
public static void main(String args[]) {
double a = 0.5;
double b = 0...
Using R to list all files with a specified extension
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answered Feb 2 '11 at 16:14
MarekMarek
43.9k1313 gold badges8484 silver badges114114 bronze badges
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Find and copy files
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Sergey Brunov
11.4k77 gold badges3535 silver badges6969 bronze badges
answered Mar 9 '11 at 5:19
malcolmpdxmalcolmpdx
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Initializing a member array in constructor initializer
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edited Oct 30 '10 at 9:44
answered Oct 30 '10 at 9:33
Jo...
Where is the documentation for the values() method of Enum?
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Justin Standard
20.7k2222 gold badges7474 silver badges8989 bronze badges
answered Dec 1 '12 at 11:58
Denys SéguretDenys Séguret
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Using the slash character in Git branch name
...basically this:
% cd .git/refs/heads
% ls -l
total 0
-rw-rw-r-- 1 jhe jhe 41 2009-11-14 23:51 labs
-rw-rw-r-- 1 jhe jhe 41 2009-11-14 23:51 master
% mkdir labs
mkdir: cannot create directory 'labs': File exists
You're getting the equivalent of the "cannot create directory" error.
When you h...
How to define servlet filter order of execution using annotations in WAR
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edited May 23 '17 at 11:54
Community♦
111 silver badge
answered Jul 3 '11 at 8:13
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Use of 'use utf8;' gives me 'Wide character in print'
...from this:
$ perl -E 'say join ":", map { ord } split //, "鸡\n";'
233:184:161:10
The first three bytes make up your character, the last one is the line-feed.
The call to print sends these four characters to STDOUT. Your console then works out how to display these characters. If your console is...
What difference is there between WebClient and HTTPWebRequest classes in .NET?
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243
WebClient is a higher-level abstraction built on top of HttpWebRequest to simplify the most com...