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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...
Can you write nested functions in JavaScript?
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Alexis
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answered Jul 9 '10 at 12:24
kennytmkennytm
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Android and setting alpha for (image) view alpha
...etAlpha(float) whose XML counterpart is android:alpha. It takes a range of 0.0 to 1.0 instead of 0 to 255. Use it e.g. like
<ImageView android:alpha="0.4">
However, the latter in available only since API level 11.
s...
Call a global variable inside module
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410
You need to tell the compiler it has been declared:
declare var bootbox: any;
If you have bet...
How to run multiple DOS commands in parallel?
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Bali CBali C
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16
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How do you enable the escape key close functionality in a Twitter Bootstrap modal?
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301
It looks like this is an issue with how the keyup event is being bound.
You can add the tabind...
SQL Server: converting UniqueIdentifier to string in a case statement
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I think I found the answer:
convert(nvarchar(50), RequestID)
Here's the link where I found this info:
http://msdn.microsoft.com/en-us/library/ms187928.aspx
share
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im...
Extract a substring from a string in Ruby using a regular expression
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answered Nov 6 '10 at 20:58
sepp2ksepp2k
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Adding services after container has been built
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answered Feb 15 '11 at 20:47
Peter LillevoldPeter Lillevold
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HMAC-SHA1 in bash
...cript.
[me@home] echo -n "value" | openssl dgst -sha1 -hmac "key"
57443a4c052350a44638835d64fd66822f813319
Or simply:
[me@home] echo -n "value" | openssl sha1 -hmac "key"
57443a4c052350a44638835d64fd66822f813319
Remember to use -n with echo or else a line break character is appended to the str...