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Fast way of finding lines in one file that are not in another?
...ind lines common to both files
comm -12 file1 file2
The man file is actually quite readable for this.
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Override back button to act like home button
... like stop animations and other things that consume a noticeable amount of CPU in order to make the switch to the next activity as fast as possible, or to close resources that are exclusive access such as the camera.
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Condition within JOIN or WHERE
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The relational algebra allows interchangeability of the predicates in the WHERE clause and the INNER JOIN, so even INNER JOIN queries with WHERE clauses can have the predicates rearrranged by the optimizer so that they may already be excluded durin...
How often should you use git-gc?
...ons that could create many loose objects." Anyone know which commands actually run it?
– Joshua Dance
Jul 8 '14 at 15:36
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Why is ArrayDeque better than LinkedList
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Also another small disadvantage (for real-time applications) is that on a push/add operation it takes a bit more when the internal array of the ArrayDeque is full, as it has to double its size and copy all the data.
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千亿时代 网游走到十字路口 - 资讯 - 清泛网 - 专注C/C++及内核技术
...伴随手机游戏一直存在的“刷用户、挣快钱、同质化”的问题仍然大量存在，固然一些企业开始围绕IP做文章，研发精品重度游戏，但仍然不免在营销、付费等层面存在“捞一把快钱”的想法。“毕竟基于数亿手机游戏用户和强...
What are bitwise operators?
I'm someone who writes code just for fun and haven't really delved into it in either an academic or professional setting, so stuff like these bitwise operators really escapes me.
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Difference between malloc and calloc?
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calloc() gives you a zero-initialized buffer, while malloc() leaves the memory uninitialized.
For large allocations, most calloc implementations under mainstream OSes will get known-zeroed pages from the OS (e.g. via POSIX mm...
Should I instantiate instance variables on declaration or in the constructor?
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There is no difference - the instance variable initialization is actually put in the constructor(s) by the compiler.
The first variant is more readable.
You can't have exception handling with the first variant.
There is additionally the initialization block, which is as well put in the constru...
list every font a user's browser can display
Is there a way in javascript to obtain the names of all fonts (or font-families) that the browser can show? (I want to give the user a dropdown with a list of all available fonts, and allow the user to choose a font.)
I'd prefer not to have to hardcode this list ahead of time or send it down from t...