Question

我在javascript中具有以下数组：

DATA[
[ 3, "Name1" ],
[ 5, "Name2" ],
[ 10, "Name3" ],
[ 55, "Name4" ]
]

我想将其转换为：

DATA[ "Name1", "Name2", "Name3", "Name4" ]

可以在javascript中使用吗？

谢谢

Answer 1

有几种方法可以做到这一点，但这是一种：

for(var i=0;i<DATA.length;i++){
  DATA[i] = DATA[i][1];//only grab the 2nd item in the array
}

Answer 2

Array.prototype.map的简单用例

let data = [
  [3, "Name1"],
  [5, "Name2"],
  [10, "Name3"],
  [55, "Name4"]
];

data = data.map(arr => arr[1]);

console.log(data);

Answer 3

只需使用map并获取每个子数组的第二项即可构建新数组。

const DATA = [
  [ 3, "Name1" ],
  [ 5, "Name2" ],
  [ 10, "Name3" ],
  [ 55, "Name4" ]
]

const newArr = DATA.map(i => i[1])

console.log(newArr)

Answer 4

尝试一下：

let data = [
  [3, "Name1"],
  [5, "Name2"],
  [10, "Name3"],
  [55, "Name4"]
];

const result =  data.map(([k, v])=>v);

console.log(result);

Answer 5

尝试一下：

Year          2017    2018    2019       All      Mean  Change  Change_mean
Branch                                                                     
BILING        1406    1280       4    2690.0     897.0  -100.0       -100.0
BILWPL         199     117     239     555.0     185.0   104.0         29.0
BKCLUB          94     161     238     493.0     164.0    48.0         45.0

删除Javascript中数组内部的每个数组的第一项

5 个答案: