ut2/lib/conformsTo.js

一个现代 JavaScript 实用工具库。[点击查看在线文档]。

'use strict';

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

var conformsTo = function (object, source) {
    var props = allKeys(source);
    var length = props.length;
    if (isNil(object)) {
        return !length;
    }
    if (length === 0) {
        return true;
    }
    for (var i = 0; i < length; i++) {
        var key = props[i];
        var predicate = source[key];
        var value = object[key];
        if ((value === native.nativeUndefined && !(key in object)) || !predicate(value)) {
            return false;
        }
    }
    return true;
};

module.exports = conformsTo;