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内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
...内存容易造成内存碎片，不利于回收。 64位系统最好分配32M以上内存，这是使用mmap的阈值。
tcmalloc
tcmalloc是Google开源的一个内存管理库， 作为glibc malloc的替代品。目前已经在chrome、safari等知名软件中运用。
根据官方测试报...
How to debug stream().map(…) with lambda expressions?
In our project we are migrating to java 8 and we are testing the new features of it.
6 Answers
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How to programmatically take a screenshot on Android?
...ur device
– Demian
May 31 '16 at 20:32
Is there a way to read the output directly without saving the result into file ...
MongoDB aggregation framework match OR
...
Balthazar
32.8k1010 gold badges7373 silver badges100100 bronze badges
answered Jun 3 '13 at 18:40
SammayeSammay...
Detect Browser Language in PHP
...
why dont you keep it simple and clean
<?php
$lang = substr($_SERVER['HTTP_ACCEPT_LANGUAGE'], 0, 2);
$acceptLang = ['fr', 'it', 'en'];
$lang = in_array($lang, $acceptLang) ? $lang : 'en';
require_once "index_{$lang}.php";
?>
...
Java - escape string to prevent SQL injection
...n CatCylon Cat
6,86722 gold badges2121 silver badges3232 bronze badges
11
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Javascript fuzzy search that makes sense
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answered Mar 22 '15 at 17:32
Yury SolovyovYury Solovyov
51888 silver badges1818 bronze badges
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How to fix: “UnicodeDecodeError: 'ascii' codec can't decode byte”
... declared in your code using the u prefix to strings. E.g.
>>> my_u = u'my ünicôdé strįng'
>>> type(my_u)
<type 'unicode'>
Unicode strings may also come from file, databases and network modules. When this happens, you don't need to worry about the encoding.
Gotchas
C...
Bash Templating: How to build configuration files from templates with Bash?
...:
#!/bin/bash
while read -r line ; do
while [[ "$line" =~ (\$\{[a-zA-Z_][a-zA-Z_0-9]*\}) ]] ; do
LHS=${BASH_REMATCH[1]}
RHS="$(eval echo "\"$LHS\"")"
line=${line//$LHS/$RHS}
done
echo "$line"
done
. Solution that does not hang if RHS references some variable th...
Media query to detect if device is touchscreen
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Angel Politis
9,3241212 gold badges3838 silver badges6060 bronze badges
answered Jul 9 '12 at 0:31
StarxStarx
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