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Why is f(i = -1, i = -1) undefined behavior?
...also nothing to say that the compiler cannot optimize that into a separate set of instructions that has the same effect, but which could fail if the operation was interleaved with another operation on the same memory location.
For example, imagine that it was more efficient to zero the memory, then...
Use grep to report back only line numbers
I have a file that possibly contains bad formatting (in this case, the occurrence of the pattern \\backslash ). I would like to use grep to return only the line numbers where this occurs (as in, the match was here, go to line # x and fix it).
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Best practices/performance: mixing StringBuilder.append with String.concat
I'm trying to understand what the best practice is and why for concatenating string literals and variables for different cases. For instance, if I have code like this
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What is the easiest way in C# to trim a newline off of a string?
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The following works for me.
sb.ToString().TrimEnd( '\r', '\n' );
or
sb.ToString().TrimEnd( Environment.NewLine.ToCharArray());
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Best way to parse command line arguments in C#? [closed]
...> names = new List<string> ();
int repeat = 1;
var p = new OptionSet () {
{ "n|name=", "the {NAME} of someone to greet.",
v => names.Add (v) },
{ "r|repeat=",
"the number of {TIMES} to repeat the greeting.\n" +
"this must be an integer.",
(int v...
Logical Operators, || or OR?
...)
{
echo "A and B are larger";
}
if (isset($d))
$d = 100;
echo $d;
unset($d);
?>
<?php
$var1 = 2;
switch($var1)
{
case 1: echo "var1 is 1";
break;
case ...
How to retrieve the hash for the current commit in Git?
I would like to retain (for now) the ability to link Git changesets to workitems stored in TFS.
20 Answers
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How to break lines at a specific character in Notepad++?
I have a text file containing text like:
6 Answers
6
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Copying the GNU screen scrollback buffer to a file (extended hardcopy)
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Ctrl + A, :, and issue the command 'log on'.
Or set it as the default in your .screenrc file as 'deflog on'.
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Can bash show a function's definition?
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Works with old shells on non-linux systems if you use typeset -f
– Emmanuel
Dec 2 '17 at 19:38
good a...