数组里面获取键名和键值

Posted 2020-10-21 仁义礼智信的

https://www.cnblogs.com/xxmb/archive/2013/11/19/3431118.html

https://www.cnblogs.com/platycoden/p/5204362.html

对于json对象:

var arr={\'a\':1,\'b\':2,\'c\':3};
for (var k in arr){  
alert(k+\' : \'+arr[k]);  
}

对于数组对象:

var arr = [
        [10,\'zhangsan\',\'male\'],
        [11,\'lisi\',\'female\'],
        [12,\'wangwu\',\'male\']
    ];
for (var i in arr){
    for(var j in arr[i]){
        document.write(arr[i][j]);
    }
    document.write(\'<br>\');
}