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Diff output from two programs without temporary files
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answered Sep 26 '10 at 23:06
John KugelmanJohn Kugelman
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How to remove last n characters from every element in the R vector
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answered May 1 '14 at 17:50
nfmcclurenfmcclure
2,25711 gold badge1919 silver badges3535 bronze badges
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Most efficient way to remove special characters from string
...om a string. Allowed characters are A-Z (uppercase or lowercase), numbers (0-9), underscore (_), or the dot sign (.).
24 An...
Is it better to reuse a StringBuilder in a loop?
...ion {
long time = System.currentTimeMillis();
for( int i = 0; i < 10000000; i++ ) {
StringBuilder sb = new StringBuilder();
sb.append( "someString" );
sb.append( "someString2"+i );
sb.append( "someStrin4g"+i );
sb.append(...
Find the host name and port using PSQL commands
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60
The default PostgreSQL port is 5432. The host that the database is operating on should have bee...
Can you make just part of a regex case-insensitive?
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answered Sep 4 '08 at 12:35
EspoEspo
38.7k2020 gold badges126126 silver badges156156 bronze badges
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How to strike through obliquely with css
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190
There is a hacky way to do this, using the :before pseudo element. You give the :before a border...
Printf width specifier to maintain precision of floating-point value
...n:
#include <float.h>
int Digs = DECIMAL_DIG;
double OneSeventh = 1.0/7.0;
printf("%.*e\n", Digs, OneSeventh);
// 1.428571428571428492127e-01
But let's dig deeper ...
Mathematically, the answer is "0.142857 142857 142857 ...", but we are using finite precision floating point numbers.
Let...
html5 - canvas element - Multiple layers
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<div style="position: relative;">
<canvas id="layer1" width="100" height="100"
style="position: absolute; left: 0; top: 0; z-index: 0;"></canvas>
<canvas id="layer2" width="100" height="100"
style="position: absolute; left: 0; top: 0; z-index: 1;"></canvas>...
Why is this program valid? I was trying to create a syntax error
...bar)
to be written as
new Foo $bar
So that means
Syntax error ! exit 0;
is the same as
error->Syntax(! exit 0);
or
error->Syntax(!exit(0));
Not only is it valid syntax, it doesn't result in a run-time error because the first thing executed is exit(0).
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