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How to Compare Flags in C#?
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In .NET 4 there is a new method Enum.HasFlag. This allows you to write:
if ( testItem.HasFlag(...
Get a filtered list of files in a directory
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import glob
jpgFilenamesList = glob.glob('145592*.jpg')
See glob in python documenttion
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Adding a new array element to a JSON object
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242
JSON is just a notation; to make the change you want parse it so you can apply the changes to ...
How to tell which version of a gem a rails app is using
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In Rails 3 and Rails 4, use bundle show
In Rails 2, rake gems will print out what gems, dependencies, and versions are installed, frozen, etc.
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How many files can I put in a directory?
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How to decode Unicode escape sequences like “\u00ed” to proper UTF-8 encoded characters?
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Try this:
$str = preg_replace_callback('/\\\\u([0-9a-fA-F]{4})/', function ($match) {
retur...
Use dynamic variable names in JavaScript
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So if you create variables like this:
var a = 1,
b = 2,
c = 3;
In the Global scope (= NO function context), you implicitly write those variables into the Global object (= window in a browser).
Those can get accessed by using the "dot" or "bracket" notation:
var name = w...
App装到手机上就"失忆"？关于Activity生命周期的7个硬核问答 - A...
...一个台阶。
Q1: Activity生命周期到底是什么？App Inventor 2里有对应的概念吗？
A: Activity是Android系统中最基本的UI容器单位，你可以理解为一个"屏幕页面"。Android系统对每个Activity都有一套严格的状态管理机制，从创建到...
Timeout a command in bash without unnecessary delay
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