将字符串解析为bool，float，number，date或string(Parse string into bool, float, number, date or string)

假设我已经控制了输入，我可以创建一个函数，将字符串转换为基于“最佳猜测”的正确类型。

'2017-12-24' -> string '2017-12-24' (implement with a simple regex) '2017' -> number 2017 (implement with parseInt - ok to ignore any letters that follows) '201.7' -> float 201.7 (implement with parseFloat - ok to ignore any letters that follows) 'True' -> bool true (implement with [].indexOf - TRUE, False, false, true also) 'foo' -> string 'foo' (implement withreqex - anything starting with a letter) '' -> null

是否有任何lib已经这样做了？

Assume that I have control of the inputs, I can create a functions that converts a string to correct type based on "best guesses".

'2017-12-24' -> string '2017-12-24' (implement with a simple regex) '2017' -> number 2017 (implement with parseInt - ok to ignore any letters that follows) '201.7' -> float 201.7 (implement with parseFloat - ok to ignore any letters that follows) 'True' -> bool true (implement with [].indexOf - TRUE, False, false, true also) 'foo' -> string 'foo' (implement withreqex - anything starting with a letter) '' -> null

Are there any libs that already does this?

最满意答案

向上转型

upcast是一个JS类型的检查/铸造库。 一些例子：

upcast.type([]); // 'array' upcast.is(123, 'string'); // false upcast.to('foo', 'array'); // ['f', 'o', 'o']

这个图书馆可能没有维护，但你会有想法写你自己的。

upcast

upcast is a JS type checking/casting library. Some examples:

upcast.type([]); // 'array' upcast.is(123, 'string'); // false upcast.to('foo', 'array'); // ['f', 'o', 'o']

This library may be unmaintained, but you'll get an idea to write your own.