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How many files can I put in a directory?
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21 Answers
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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 ...
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...
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...
How to decode Unicode escape sequences like “\u00ed” to proper UTF-8 encoded characters?
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172
Try this:
$str = preg_replace_callback('/\\\\u([0-9a-fA-F]{4})/', function ($match) {
retur...
Timeout a command in bash without unnecessary delay
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23 Answers
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ASP.NET Web API OperationCanceledException when browser cancels the request
...oads a page, it makes one or more ajax requests, which hit ASP.NET Web API 2 controllers. If the user navigates to another page, before these ajax requests complete, the requests are canceled by the browser. Our ELMAH HttpModule then logs two errors for each canceled request:
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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...
How to iterate through two lists in parallel?
... Python 3, zip
returns an iterator of tuples, like itertools.izip in Python2. To get a list
of tuples, use list(zip(foo, bar)). And to zip until both iterators are
exhausted, you would use
itertools.zip_longest.
Python 2
In Python 2, zip
returns a list of tuples. This is fine when foo and bar are...