JavaScript 代码片段

1.无题

if (i && i.charAt(i.length - 1) == "/") {
    i = i.substr(0, i.length - 1)
}

2.无题

if(typeof(jQuery) !== 'undefined'){
    getUserInfo();
}

 3.无题

sorted: function(a, b) {
    // sort alphabetically in ascending order
    return a.label == b.label ? 0 : (
        a.label > b.label ? 1 : -1
    )
}

 4.JavaScript模拟QueryString获取GET参数

QueryString = {
    data: {},
    Initial: function () {
        var aPairs, aTmp;
        var queryString = new String(window.location.search);
        queryString = queryString.substr(1, queryString.length); //remove   "?"   
        aPairs = queryString.split("&");
        for (var i = 0; i < aPairs.length; i++) {
            aTmp = aPairs[i].split("=");
            this.data[aTmp[0]] = aTmp[1];
        }
    },
    GetValue: function (key) {
        return this.data[key];
    }
}

 5.JavaScript使用正则表达式替换括号、尖括号等

/*正则表达式 替换括号,尖括号等*/
function toTxt(str) {
    var RexStr = /\<|\>|\"|\'|\&/g
    str = str.replace(RexStr, function(MatchStr) {
        switch (MatchStr) {
        case "<":
            return "&lt;";
            break;
        case ">":
            return "&gt;";
            break;
        case "\"":
            return "&quot;";
            break;
        case "'":
            return "&#39;";
            break;
        case "&":
            return "&amp;";
            break;
        default:
            break;
        }
    })
    return str;
}

 ===========================我是分割线==============================

(function(){
    function isArray(obj) {   
        return Object.prototype.toString.call(obj) === '[object Array]';    
    }  

    function loadFunction(list) {
        var list = isArray(list) ? list : [];
        for (var i=0; i<list.length; i++) {
            window[list[i]] = window[list[i]] || function(){};
        }
    }

    //执行loadFunction函数，传递一个数组列表
    loadFunction([
        'cmSetClientID',
        'cmCreatePageviewTag',
        'cmCreateProductviewTag',
        'cmCreateShopAction9Tag',
        'cmCreateOrderTag',
        'cmCreateRegistrationTag',
        'cmCreateElementTag',
        'cmCreateConversionEventTag'
    ]);

    // coremetrics预定义方法
    window["_LVMAMA_COREMETRICS"] = window["_LVMAMA_COREMETRICS"] || {};
    /**
     * 部署环境参数: _LVMAMA_COREMETRICS.CURRENT_ENV
     *
     * 开发: DEVELOPMENT;
     * 生产: PRODUCTION;
     */
    _LVMAMA_COREMETRICS.CURRENT_ENV = 'PRODUCTION';
    _LVMAMA_COREMETRICS.ENV = {
        DEVELOPMENT: [
            '60409730',
            false,
            'testdata.cn.coremetrics.com'
        ],
        PRODUCTION: [
            '90409730',
            true,
            'data.cn.coremetrics.com'
        ]
    };
    _LVMAMA_COREMETRICS.init = function(domain) {
        cmSetClientID.apply(null, _LVMAMA_COREMETRICS.ENV[_LVMAMA_COREMETRICS.CURRENT_ENV].concat("lvmama.com"));
    }
})();