从单个数组创建嵌套数组的最快方法？

Question

我在 .txt 文件中有大量数据。我正在用 node.js fs.readFile 阅读它，当我将数据作为 data.toString() 时，我得到这样的东西：

II IY 9C JD 2D QC QY 6Y 3C ID
KI JI 2Y 6Y 5Y QY QI 3Y 7C 6D
TC 3Y 4I 7Y QC 2Y 3I 8C JI KH
AH 8H 5I 4C 9H JD 3H 7I JC AC

我需要创建一个嵌套数组，每行分成五个。它应该是这样的：

[
[[["I","I"] ["I","Y"] ["9","C"] ["J","D"] ["2","D"]], [["Q","C"] ["Q","Y"] ["6","Y"] ["3","C"] ["I","D"]]]
[[["K","I"] ["J","I"] ["2","Y"] ["6","Y"] ["5","Y"]], [["Q","Y"] ["Q","I"] ["3","Y"] ["7","C"] ["6","D"]]]
[[["T","C"] ["3","Y"] ["4","I"] ["7","Y"] ["Q","C"]], [["2","Y"] ["3","I"] ["8","C"] ["J","I"] ["K","H"]]]
[[["A","H"] ["8","H"] ["5","I"] ["4","C"] ["9","H"]], [["J","D"] ["3","H"] ["7","I"] ["J","C"] ["A","C"]]]
]

最好的方法是什么？

编辑：

当前代码：

const fs = require('fs');
  fs.readFile(path, async (err, data) => {
    if (err) {
      return console.error(err);
    }
    console.log(data.toString());
  });

文件片段：

8C TS KC 9H 4S 7D 2S 5D 3S AC
5C AD 5D AC 9C 7C 5H 8D TD KS
3H 7H 6S KC JS QH TD JC 2D 8S
TH 8H 5C QS TC 9H 4D JC KS JS
7C 5H KC QH JD AS KH 4C AD 4S
5H KS 9C 7D 9H 8D 3S 5D 5C AH
6H 4H 5C 3H 2H 3S QH 5S 6S AS
TD 8C 4H 7C TC KC 4C 3H 7S KS
7C 9C 6D KD 3H 4C QS QC AC KH
JC 6S 5H 2H 2D KD 9D 7C AS JS
AD QH TH 9D 8H TS 6D 3S AS AC
2H 4S 5C 5S TC KC JD 6C TS 3C
QD AS 6H JS 2C 3D 9H KC 4H 8S
KD 8S 9S 7C 2S 3S 6D 6S 4H KC
3C 8C 2D 7D 4D 9S 4S QH 4H JD
8C KC 7S TC 2D TS 8H QD AC 5C
3D KH QD 6C 6S AD AS 8H 2H QS
6S 8D 4C 8S 6C QH TC 6D 7D 9D

Answer 1

您可以进行一些字符串操作，尤其是 split()。

更新

答案似乎没有满足OP的问题。这是实际版本：

const data = 
`8C TS KC 9H 4S 7D 2S 5D 3S AC
5C AD 5D AC 9C 7C 5H 8D TD KS
3H 7H 6S KC JS QH TD JC 2D 8S
TH 8H 5C QS TC 9H 4D JC KS JS
7C 5H KC QH JD AS KH 4C AD 4S
5H KS 9C 7D 9H 8D 3S 5D 5C AH
6H 4H 5C 3H 2H 3S QH 5S 6S AS
TD 8C 4H 7C TC KC 4C 3H 7S KS
7C 9C 6D KD 3H 4C QS QC AC KH
JC 6S 5H 2H 2D KD 9D 7C AS JS
AD QH TH 9D 8H TS 6D 3S AS AC
2H 4S 5C 5S TC KC JD 6C TS 3C
QD AS 6H JS 2C 3D 9H KC 4H 8S
KD 8S 9S 7C 2S 3S 6D 6S 4H KC
3C 8C 2D 7D 4D 9S 4S QH 4H JD
8C KC 7S TC 2D TS 8H QD AC 5C
3D KH QD 6C 6S AD AS 8H 2H QS
6S 8D 4C 8S 6C QH TC 6D 7D 9D`;
const lines = data.split("\n"); // Each line will be an array value
let result = []; // Define our result
lines.forEach(item => {
  let current = [];
  let now = item.split(" ");
  let fir = [];
  let sec = [];
  for(let i = 0; i < now.length; i++) {
    if(i < 5) fir.push(now[i].split(""));
    else sec.push(now[i].split(""));
  }
  current.push(fir);
  current.push(sec);
  result.push(current);
});
console.log(result);

旧版本

const data = 
`8C TS KC 9H 4S 7D 2S 5D 3S AC
5C AD 5D AC 9C 7C 5H 8D TD KS
3H 7H 6S KC JS QH TD JC 2D 8S
TH 8H 5C QS TC 9H 4D JC KS JS
7C 5H KC QH JD AS KH 4C AD 4S
5H KS 9C 7D 9H 8D 3S 5D 5C AH
6H 4H 5C 3H 2H 3S QH 5S 6S AS
TD 8C 4H 7C TC KC 4C 3H 7S KS
7C 9C 6D KD 3H 4C QS QC AC KH
JC 6S 5H 2H 2D KD 9D 7C AS JS
AD QH TH 9D 8H TS 6D 3S AS AC
2H 4S 5C 5S TC KC JD 6C TS 3C
QD AS 6H JS 2C 3D 9H KC 4H 8S
KD 8S 9S 7C 2S 3S 6D 6S 4H KC
3C 8C 2D 7D 4D 9S 4S QH 4H JD
8C KC 7S TC 2D TS 8H QD AC 5C
3D KH QD 6C 6S AD AS 8H 2H QS
6S 8D 4C 8S 6C QH TC 6D 7D 9D`;
const lines = data.split("\n"); // Each line will be an array value
let result = []; // Define our result
lines.forEach(item => {
  let current = [];
  let now = item.split(" ");
  let fir = [];
  let sec = [];
  for(let i = 0; i < now.length; i++) {
    if(i < 5) fir.push(now[i].split(""));
    else sec.push(now[i].split(""));
  }
  current.push(fir);
  current.push(sec);
  result.push(current);
});
console.log(result);

Answer 2

这将为您提供多组 2 组 5 项的预期输出

let data = `II IY 9C JD 2D QC QY 6Y 3C ID
KI JI 2Y 6Y 5Y QY QI 3Y 7C 6D
TC 3Y 4I 7Y QC 2Y 3I 8C JI KH
AH 8H 5I 4C 9H JD 3H 7I JC AC`;

let nested = data.split("\n").map(l => ([
  [...l.split(" ").filter((n, i) => i < 5).map(n => n.split(''))],
  [...l.split(" ").filter((n, i) => i >= 5).map(n => n.split(''))]
]))

console.log(nested)

// or even more concise

const gset = (grp,setn) => [...grp.split(" ").filter((n, i) => setn == 0 ? (i < 5) : (i>=5)).map(n => n.split(''))]
let nested2 = data.split("\n").map(g => ([gset(g,0), gset(g,1)]))
console.log('More concise version:', nested2)

Answer 3

split()就是你要用的。

let data = `II IY 9C JD 2D QC QY 6Y 3C ID
KI JI 2Y 6Y 5Y QY QI 3Y 7C 6D
TC 3Y 4I 7Y QC 2Y 3I 8C JI KH
AH 8H 5I 4C 9H JD 3H 7I JC AC`;

const createArray = (str) => {
    const splitedByLines = str.split('\n');
    const splitedByBlank = splitedByLines.map(line => line.split(' '));
    const result = splitedByBlank.map(line => line.map(e => e.split('')));
    return result;
}

console.log(createArray(data));

您甚至可以在一行中完成所有内容：

let data = `II IY 9C JD 2D QC QY 6Y 3C ID
KI JI 2Y 6Y 5Y QY QI 3Y 7C 6D
TC 3Y 4I 7Y QC 2Y 3I 8C JI KH
AH 8H 5I 4C 9H JD 3H 7I JC AC`;

const createArray2 = str => str.split('\n').map(line => line.split(' ')).map(line => line.map(e => e.split('')));

console.log(createArray2(data));

从单个数组创建嵌套数组的最快方法？

Fastest way for creating nested arrays from single array?

javascript

node.js

arrays

fs

tostring

更新

旧版本