为什么Underscore.js有延迟功能？ [英] Why does Underscore.js have a delay function?

问题描述

这是Underscore.js的源代码'延迟功能：

This is the source code for Underscore.js' delay function:

_.delay = function (func, wait) {
    var args = slice.call(arguments, 2);
    return setTimeout(function () { return func.apply(null, args); }, wait);
};

这与 setTimeout 有什么不同？为什么Underscore.js需要延迟？

How is this any different from setTimeout? Why does Underscore.js need delay?

推荐答案

这是一个跨浏览器能够传递额外参数的方法，这些参数将作为回调的参数出现，如 setTimeout（）。这在IE中不起作用。

It's a cross browser way of being able to pass extra arguments which will appear as the arguments to the callback, like setTimeout(). This doesn't work in IE.

它可以使你的代码更漂亮......

It can make your code prettier...

setTimeout(_.bind(function() { }, null, "arg1"), 1e3);

... vs ...

...vs...

_.delay(function() { }, 1e3, "arg1");

我同意它是一种不太有用的Underscore方法，在 Naomi的回答。

I agree that it's one of the less useful Underscore methods, which are outlined in Naomi's answer.

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