使用javascript对数组进行数字排序

Question

我有这个数组:

[ [ 1, 'a' ], [ 2, 'b' ], [ 1, 'd' ], [ 9, 'e' ], [ 1, 'f' ], [ 11, 'g' ], [ 9, 'h' ], [ 3, 'i' ] ]

我希望:

[ [ 11, 'g' ], [ 9, 'e' ], [ 9, 'h' ], [ 3, 'i' ], [ 2, 'b' ], [ 1, 'a' ], [ 1, 'd' ], [ 1, 'f' ] ]

我怎么能用javascript做到这一点？

我试过了sort(),我也尝试过sort(compare):

function compare(x, y) {
  return x - y;
}

Answer 1

您可以使用.sort()具有Array Destructuring这样的:

function compare([a], [b]) {
  return b - a;
}

演示:

let a = [ [ 1, 'a' ], [ 2, 'b' ], [ 1, 'd' ], [ 9, 'e' ], [ 1, 'f' ], [ 11, 'g' ], [ 9, 'h' ], [ 3, 'i' ] ];

a.sort(compare);

function compare([a], [b]) {
  return b - a;
}

console.log(a);

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如果第一个元素匹配,您也可以基于第二个元素进行排序:

function compare([a, c], [b, d]) {
  return (b - a) || c.localeCompare(d)
}

演示:

let a = [ [ 2, 'b' ], [ 1, 'd' ], [ 9, 'e' ], [ 1, 'f' ], [ 11, 'g' ], [ 9, 'h' ], [ 3, 'i' ], [ 1, 'a' ] ];

a.sort(compare);

function compare([a, c], [b, d]) {
  return (b - a) || c.localeCompare(d);
}

console.log(a);

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