angular 源码中似乎有重复的代码?

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var lowercase = function (string) {
    return isString (string) ? string.toLowerCase () : string;
};

var manualLowercase = function (s) {
    return isString (s) ? s.replace (/[A-Z]/g, function (ch) {
        return String.fromCharCode (ch.charCodeAt (0) | 32);
    }) : s;
};

这两个函数作用是相同的吧,可是为什么要写两个呢?反正都是将大写变小写

3 replies • 2015-11-18 15:59:08 +08:00

doublleft

Nov 18, 2015

涨姿势

p2p

Nov 18, 2015

// String#toLowerCase and String#toUpperCase don't produce correct results in browsers with Turkish
// locale, for this reason we need to detect this case and redefine lowercase/uppercase methods
// with correct but slower alternatives.

if ('i' !== 'I'.toLowerCase()) {
lowercase = manualLowercase;
uppercase = manualUppercase;
}

rannnn

Nov 18, 2015 via iPhone

土耳其语的 i 大写是不是 I
比如'input'.toUpperCase() !== 'INPUT'