帮忙写一段很简单的匹配正则表达式


var a=[
            {"id":3, "code":"110101", "name":"东城区"},
            {"id":4, "code":"110102", "name":"西城区"},
            {"id":5, "code":"110103", "name":"崇文区"},
            {"id":6, "code":"110104", "name":"宣武区"},
            {"id":7, "code":"110105", "name":"朝阳区"},
            {"id":8, "code":"110106", "name":"丰台区"},
            {"id":9, "code":"110107", "name":"石景山区"},
            {"id":10, "code":"110108", "name":"海淀区"},
            {"id":11, "code":"110109", "name":"门头沟区"},
            {"id":12, "code":"110111", "name":"房山区"},
            {"id":13, "code":"110112", "name":"通州区"},
            {"id":14, "code":"110113", "name":"顺义区"},
            {"id":15, "code":"110114", "name":"昌平区"},
            {"id":16, "code":"110115", "name":"大兴区"},
            {"id":17, "code":"110116", "name":"怀柔区"},
            {"id":18, "code":"110117", "name":"平谷区"}
        ];
for(var i in a)delete a[i].code;
alert(JSON.stringify(a));