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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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In Python, how do I create a string of n characters in one line of code?
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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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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...
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...
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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Logical Operators, || or OR?
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{
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 ...
grep exclude multiple strings
I am trying to see a log file using tail -f and want to exclude all lines containing the following strings:
7 Answers
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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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select and update database record with a single queryset
How do I run an update and select statements on the same queryset rather than having to do two queries:
- one to select the object
- and one to update the object
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