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https://stackoverflow.com/questions/4775722/check-if-object-is-an-array One of the weird behaviour and spec in Javascript is the typeof Array is Object. You can check if the variable is an array in couple of ways: var isArr = data instanceof Array; v…
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JavaScript : Array assignment creates reference not copy 29 May 2015 Consider we have an array var a = [1,2,3,4]; and we assign var b = a; then b not a copy of a, b is a pointer to a. So if you make any changes on b will have effect on a as well. Her…
1. matlab中有一个函数iscell() 用于判断一个数组是不是cell array 参考:MATLAB Function Reference iscell Determine whether input is cell array Syntax tf = iscell(A) Description tf = iscell(A) returns logical 1 (true) if A is a cell array and logical 0 (false) otherwise. Ex…
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  阅读器 iOS开发iOS   本文由TracyYih[博客]翻译自NSHipster的文章Method Swizzling.   在上周associated objects一文中,我们开始探索Objective-C运行时的一些黑魔法.本周我们继续前行,来讨论可能是最受争议的运行时技术:method swizzling.   Method swizzling指的是改变一个已存在的选择器对应的实现的过程,它依赖于Objectvie-C中方法的调用能够在运行时进改变——通过改变类的调度表(disp…