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php函数-2019-06-12
小人物的博客
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回调函数：
        简单的讲就是在调用函数的时候，通过在形参传入一个函数（我们称他为回调函数），来干预主调函数的运行，从而得到不同的结果

匿名函数(Anonymous functions)， 也叫闭包函数(closures), 允许指定一个没有名称的函数。最常用的就是回调函数的参数值

使用场景:类似AJAX,在主线程执行过中,利用回调函数来干预主函数运行,回调函数执行完毕之后，再回到主线程处理接下来的流程

Correction status：Uncorrected

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