大约有 44,200 项符合查询结果（耗时：0.0530秒） [XML]
Accessing JPEG EXIF rotation data in JavaScript on the client side
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262
If you only want the orientation tag and nothing else and don't like to include another huge j...
Undo working copy modifications of one file in Git?
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2263
You can use
git checkout -- file
You can do it without the -- (as suggested by nimrodm), b...
Programmatically Lighten or Darken a hex color (or rgb, and blend colors)
... darken a hex color by a specific amount. Just pass in a string like "3F6D2A" for the color ( col ) and a base10 integer ( amt ) for the amount to lighten or darken. To darken, pass in a negative number (i.e. -20 ).
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How to format a float in javascript?
...n JavaScript, when converting from a float to a string, how can I get just 2 digits after the decimal point? For example, 0.34 instead of 0.3445434.
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数据结构、算法复杂度一览表 - 更多技术 - 清泛网移动版 - 专注C/C++及内核技术
...数组作为优先队列)
图G(V,E), V为顶点集, E为边集
O(|V|^2)
O(|V|^2)
O(|V|)
Bellman-Ford最短路径算法
图G(V,E), V为顶点集, E为边集
O(|V||E|)
O(|V||E|)
O(|V|)
排序算法(来源)
算法
数据结构
时间复杂度
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lose vim colorscheme in tmux mode
I'm running iterm2 and when I'm in tmux mode the colorscheme I have set in vim does not show up. Only the color scheme I've set in iterm. If I run vim from shell the colorscheme appears correct - its only when I'm in tmux mode.
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Git for Windows - The Program can't start because libiconv2.dll is missing
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25 Answers
25
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Most efficient way to prepend a value to an array
...big-O but certainly using the unshift method is more concise:
var a = [1, 2, 3, 4];
a.unshift(0);
a; // => [0, 1, 2, 3, 4]
[Edit]
This jsPerf benchmark shows that unshift is decently faster in at least a couple of browsers, regardless of possibly different big-O performance if you are ok with...