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How does grep run so fast?
...omparison
# (everything is in the buffer cache)
$ time grep -c 'tg=f_c' 20140910.log
28
0.168u 0.068s 0:00.26
$ time grep -c ' /cc/merchant.json tg=f_c' 20140910.log
28
0.100u 0.056s 0:00.17
The longer form is 35% faster!
How come? Boyer-Moore consructs a skip-forward table from the pattern-st...
Bootstrap 3 - Why is row class is wider than its container?
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edited Feb 4 '16 at 14:50
Seonghyeon Cho
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answered Sep 23 '13 at 21:...
Is there a builtin confirmation dialog in Windows Forms?
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RaaghavRaaghav
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Regular expression for exact match of a string
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180
if you have a the input password in a variable and you want to match exactly 123456 then anchors...
How to redirect single url in nginx?
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answered Aug 3 '13 at 23:06
BraveNewCurrencyBraveNewCurrency
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Multi-line regex support in Vim
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answered Apr 24 '09 at 1:28
Brian CarperBrian Carper
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Simplest way to profile a PHP script
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104
The PECL APD extension is used as follows:
<?php
apd_set_pprof_trace();
//rest of the scri...
What is the proper way to check if a string is empty in Perl?
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answered Jan 11 '10 at 23:20
Greg HewgillGreg Hewgill
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Is == in PHP a case-sensitive string comparison?
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101
Yes, == is case sensitive.
You can use strcasecmp for case insensitive comparison
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Center a position:fixed element
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You basically need to set top and left to 50% to center the left-top corner of the div. You also need to set the margin-top and margin-left to the negative half of the div's height and width to shift the center towards the middle of the div.
Thus, provided a <!DOC...