(function () {
    var citys = inCity.allCity, match, letter,
            regEx = inCity.regEx,
            reg2 = /^[a-g]$/i, reg3 = /^[h-l]$/i, reg4 = /^[m-t]$/i, reg5 = /^[w-z]$/i;
    if (!inCity.oCity) {
        inCity.oCity = {hot:{},ABCDEFG:{}, HIJKL:{}, MNOPQRST:{}, WXYZ:{}};
        //console.log(citys.length);
        for (var i = 0, n = citys.length; i < n; i++) {
            match = regEx.exec(citys[i]); //exec
            letter = match[3].toUpperCase(); //转换字母为大写

            if (reg2.test(letter)) { //test检测一个字符串是否匹配某个模式
                if (!inCity.oCity.ABCDEFG[letter]) inCity.oCity.ABCDEFG[letter] = [];
                inCity.oCity.ABCDEFG[letter].push(match[1]);
            } else if (reg3.test(letter)) {
                if (!inCity.oCity.HIJKL[letter]) inCity.oCity.HIJKL[letter] = [];
                inCity.oCity.HIJKL[letter].push(match[1]);
            } else if (reg4.test(letter)) {
                if (!inCity.oCity.MNOPQRST[letter]) inCity.oCity.MNOPQRST[letter] = [];
                inCity.oCity.MNOPQRST[letter].push(match[1]);
            } else if (reg5.test(letter)) {
                if (!inCity.oCity.WXYZ[letter]) inCity.oCity.WXYZ[letter] = [];
                inCity.oCity.WXYZ[letter].push(match[1]);
            }
            /* 热门城市 前16条 */