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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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AsyncProcedures异步过程扩展 · App Inventor 2 中文网
... 各版本对比 App上架指南 入门必读 IoT专题 AI2拓展 Aia Store 关于 关于我们 发布日志 服务条款 搜索 ...
Adding a new array element to a JSON object
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JSON is just a notation; to make the change you want parse it so you can apply the changes to ...
How many files can I put in a directory?
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21 Answers
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前有网易喂猪，后有宜信养牛 - 资讯 - 清泛网 - 专注C/C++及内核技术
...户，对于金融公司原有的矜持，早已抛去九霄云外。“敢2”成了宜信的一种特质，更成为接地气式服务的体现。
最近一期宜信内部刊物上，打出了一个惊人的新闻标题“中国首例活体租赁”，租赁的标的物是牛。“可以说宜信...
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
...vation Object).
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...
Timeout a command in bash without unnecessary delay
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23 Answers
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Empty arrays seem to equal true and false at the same time
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276
You're testing different things here.
if (arr) called on object (Array is instance of Object...