string render

render.js

    /**
     * 替换字符串 ${}
     * @param obj
     * @returns {String}
     * @example
     * '我是${str}'.render({str: '测试'});
     */
    String.prototype.render = function (obj) {
        var str = this, reg;

        Object.keys(obj).forEach(function (v) {
            reg = new RegExp('\\$\\{' + v + '\\}', 'g');
            str = str.replace(reg, obj[v]);
        });

        return str;
    };