我想创建Object-type数组，for循环只推送最后一个值，为什么？

Question

我想创建Object-type数组，for循环只推送最后一个值？

＆＃13;

＆＃13;

parse

＆＃13;

＆＃13;

＆＃13;

结果：

Answer 1

描述

通过代码中的评论添加

＆＃13;

＆＃13;

var arr = [];
// removed object declaration
// removed initialization
a = [1, 2, 3, 4];
b = ['tom', 'sun', 'bob', 'kiki'];
for (var i = 0; i < 4; i++) {
  // initialize new object
  var k = {};
  // set properties
  k.num = a[i];
  k.name = b[i];
  arr.push(k)
}
console.log(arr)

//result [{name:'kiki',num:4},{name:'kiki',num:4},{name:'kiki',num:4},{name:'kiki',num:4}]

＆＃13;

＆＃13;

＆＃13;

另一种方式

＆＃13;

＆＃13;

var arr = [];
a = [1, 2, 3, 4];
b = ['tom', 'sun', 'bob', 'kiki'];
for (var i = 0, length = a.length; i < length; i++) {
  arr.push({num: a[i], name: b[i]})
}
console.log(arr)

//result [{name:'kiki',num:4},{name:'kiki',num:4},{name:'kiki',num:4},{name:'kiki',num:4}]

＆＃13;

＆＃13;

＆＃13;