Question

我有这个数组，其第一列为id：

var mainarray = [
["1001","P6","P8"],
["1002","P7"],
["1003","P7","P8","P10"],
["1004","P6","P10"],
];

我想用下面的'lookup'数组中的相应动物替换每个'P'元素：

var arraylookup= [
["P6","dog"],
["P7","cat"],
["P8","mouse"],
["P9","horse"],
["P10","cow"],
];

...这将为我提供以下新数组

var newarray= [
["1001","dog","mouse"],
["1002","cat"],
["1003","cat","mouse","cow"],
["1004","dog","cow"],
];

我已经完全迷惑了自己。感谢您的帮助。

Answer 1

首先，您应该将arraylookup转换为对象，即：

const objLookUp= {
  "P6": "dog"],
  "P7": "cat",
  ...
};

const arrayLookUp= [
  ["P6","dog"],
  ["P7","cat"],
  ["P8","mouse"],
  ["P9","horse"],
  ["P10","cow"],
];

const objLookUp = arrayLookUp.reduce((r, [key, value]) => (r[key]= value, r), {});

console.log(objLookUp);

然后，将输入数组转换为所需格式会更加容易：

const mainArray = [
  ["1001","P6","P8"],
  ["1002","P7"],
  ["1003","P7","P8","P10"],
  ["1004","P6","P10"],
];

const arrayLookUp= [
  ["P6","dog"],
  ["P7","cat"],
  ["P8","mouse"],
  ["P9","horse"],
  ["P10","cow"],
];

const objLookUp = arrayLookUp.reduce((r, [key, value]) => (r[key]= value, r), {});
const result = mainArray.map(
  arr => arr.map(v => v in objLookUp ? objLookUp[v] : v)
);

console.log(result);

.as-console-wrapper { max-height: 100% !important; top: 0; }

查找并替换多维数组中的每个元素

1 个答案: