ut2/lib/partial.js

一个现代 JavaScript 实用工具库。[点击查看在线文档]。

'use strict';

var native = require('./internals/native.js');

var PLACEHOLDER = {
    __ut2_partial_ph__: null
};
var partial = function (func) {
    var argsOrig = native.arrayProtoSlice.call(arguments, 1);
    return function () {
        var args = [];
        var argsPartial = native.arrayProtoSlice.call(arguments);
        for (var i = 0; i < argsOrig.length; i++) {
            args[i] = argsOrig[i] === PLACEHOLDER ? argsPartial.shift() : argsOrig[i];
        }
        return func.apply(this, args.concat(argsPartial));
    };
};
partial.placeholder = partial._ = PLACEHOLDER;

module.exports = partial;