ember.js - findQuery 在 Ember 本地存储适配器中的工作原理

Question

在findQueryEmber 本地存储适配器的功能中，我对包含"[Object RegExp]". 这是什么意思？

    if (Object.prototype.toString.call(test) == '[object RegExp]') {
      push = test.test(record[property]);
    } else {
      push = record[property] === test;
    }

Answer 1

[Object RegExp] is the string representation (toString()) of a regular expression object in Javascript.

That part of the code checks if the query is a regular expression. If so, it runs the expression object's test() on the property, otherwise does a strict === comparison.

Try running this in a console:

var test = /a.*?nice regex/;
var string = "Is this a very nice regex?";
console.log( Object.prototype.toString.call(test) );
console.log( test.test(string) );