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内存优化总结:ptmalloc、tcmalloc和jemalloc - 操作系统(内核) - 清泛网 - ...
...oc/free系列函数，而glibc使用的ptmalloc2在性能上远远弱后于google的tcmalloc和facebook的jemalloc。 而且后两者只需要使用LD_PRELOAD环境变量启动程序即可，甚至并不需要重新编译。
glibc ptmalloc2
ptmalloc2即是我们当前使用的glibc malloc版本。...
How to write to a JSON file in the correct format
...
This question is for ruby 1.8 but it still comes on top when googling.
in ruby >= 1.9 you can use
File.write("public/temp.json",tempHash.to_json)
other than what mentioned in other answers, in ruby 1.8 you can also use one liner form
File.open("public/temp.json","w"){ |f| f.wr...
How do I clear this setInterval inside a function?
... if (timedCount >= markers.length) {
timedCount = 0;
}
google.maps.event.trigger(markers[timedCount], "click");
timedCount++;
}, 5000 );
};
var id = intervalTrigger();
Then to clear the interval:
window.clearInterval(id);
...
Can you find all classes in a package using reflection?
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Ah, here we go: code.google.com/p/reflections/issues/detail?id=122. Object is excluded by default, but you can rejigger it. Thanks for pointing me to this library, it's great!
– mtrc
Aug 25 '12 at 14:50
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Turn off Chrome/Safari spell checking by HTML/css
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What is the max size of localStorage values?
...t on cookies, providing much greater storage capacity (10 MB per origin in Google Chrome(https://plus.google.com/u/0/+FrancoisBeaufort/posts/S5Q9HqDB8bh), Mozilla Firefox, and Opera; 10 MB per storage area in Internet Explorer) and better programmatic interfaces.
And also quoting from a John Resig...
How do I suspend painting for a control and its children?
...rd .Net controls, custom controls and devexpress controls.
After a lot of googling and reflector usage I came across the WM_SETREDRAW win32 message. This really stops controls drawing whilst you update them and can be applied, IIRC to the parent/containing panel.
This is a very very simple class ...
Get application version name using adb
... sometimes it returns multiple results, e.g. adb shell dumpsys package com.google.android.apps.photos | grep versionName because of the Hidden system packages: section. Maybe a head -n1 would solve it...
– Ciro Santilli 郝海东冠状病六四事件法轮功
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sqlalchemy IS NOT NULL select
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Thanks, this is what I was looking for but Google sent me here!
– Sinister Beard
Jan 30 at 10:43
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What do you call the -> operator in Ruby?
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Lambda rocket
I got that from this article.
But first a google search for
ruby lambda shorthand
http://ruby-journal.com/becareful-with-space-in-lambda-hash-rocket-syntax-between-ruby-1-dot-9-and-2-dot-0/
s...