使用 Javascript 将列表列表转换为字典列表

Question

是否有使用 javascript 的内置方式将列表列表转换为字典列表？

前

[
   [
      "x", 
      "y", 
      "z",  
      "total_count", 
      "total_wins"
   ], 
   [
      25.18, 
      24.0, 
      27520.0, 
      16, 
      6, 
   ], 
   [
      25.899, 
      24.0, 
      27509.0, 
      336, 
      8
   ], 
   [
      26.353, 
      26.0, 
      27256.0, 
      240.0, 
      15 
   ], 
   [
      119.0, 
      5.0, 
      6.0, 
      72, 
      0
   ]
]

后

[
   {
      "x": 25.18, 
      "y": 24.0, 
      "z": 27520.0, 
      "total_count": 16, 
      "total_wins": 6, 
   }, 
   {
      "x": 25.899, 
      "y": 24.0, 
      "z": 27509.0, 
      "total_count": 336, 
      "total_wins": 8
   }, 
   {
      "x": 26.353, 
      "y": 26.0, 
      "z": 27256.0, 
      "total_count": 240.0, 
      "total_wins": 15 
   }, 
   {
      "x": 119.0, 
      "y": 5.0, 
      "z": 6.0, 
      "total_count": 72, 
      "total_wins": 0
   }
]

Answer 1

也许没有内置，但有一种方法

 const input = [["x", "y", "z", "total_count", "total_wins"], [25.18, 24.0, 27520.0, 16, 6,], [25.899, 24.0, 27509.0, 336, 8], [26.353, 26.0, 27256.0, 240.0, 15], [119.0, 5.0, 6.0, 72, 0]]; const keys = input.shift(); console.log(input.map(values => Object.fromEntries(keys.map((key, idx) => [ key, values[idx] ]))));

Answer 2

您可以使用rest operator, map and Object.fromEntries

 let data = [["x", "y", "z", "total_count", "total_wins"], [25.18, 24.0, 27520.0, 16, 6,], [25.899, 24.0, 27509.0, 336, 8], [26.353, 26.0, 27256.0, 240.0, 15], [119.0, 5.0, 6.0, 72, 0]]; let [keys, ...rest] = data let final = rest.map(inp => Object.fromEntries(inp.map((value, index) => [keys[index], value]))) console.log(final)

---

如果您在不支持 Object.fromEntries 的环境中工作，那么您可以使用 reduce

 let data = [["x", "y", "z", "total_count", "total_wins"], [25.18, 24.0, 27520.0, 16, 6,], [25.899, 24.0, 27509.0, 336, 8], [26.353, 26.0, 27256.0, 240.0, 15], [119.0, 5.0, 6.0, 72, 0]]; let [keys, ...rest] = data let buildObject = (valueArr) => { return valueArr.reduce((op, inp, index) => { op[keys[index]] = inp return op }, {}) } let final = rest.map(inp => buildObject(inp, keys)) console.log(final)