我有一个二维数组: array1。我希望映射到array1中的每个数组,并对每个数组中的数字进行排序,然后将它们返回到一个新的数组: sortedRows。我知道在数组上的映射会返回一个新的数组,但是当我在映射过程中对每个内部数组进行排序时,它会对array1和sortedRows中的所有数字进行排序。
我已经分别尝试将行映射到行,然后映射/排序到sortedRows,并尝试使用展开操作符( array1 = ...array1)进行复制。两次尝试都会得到下面相同的结果。
let array1 = [[5, 3, 4, 6, 7, 8, 9, 1, 2],
[6, 7, 2, 1, 9, 5, 3, 4, 8],
[1, 9, 8, 3, 4, 2, 5, 6, 7],
[8, 5, 9, 7, 6, 1, 4, 2, 3],
[4, 2, 6, 8, 5, 3, 7, 9, 1],
[7, 1, 3, 9, 2, 4, 8, 5, 6],
[9, 6, 1, 5, 3, 7, 2, 8, 4],
[2, 8, 7, 4, 1, 9, 6, 3, 5],
[3, 4, 5, 2, 8, 6, 1, 7, 9]]
let sortedRows = array1.map(arr => arr.sort((a, b) => a - b))
console.log(array1)
console.log(sortedRows)
// expected
[ [5, 3, 4, 6, 7, 8, 9, 1, 2],
[6, 7, 2, 1, 9, 5, 3, 4, 8],
[1, 9, 8, 3, 4, 2, 5, 6, 7],
[8, 5, 9, 7, 6, 1, 4, 2, 3],
[4, 2, 6, 8, 5, 3, 7, 9, 1],
[7, 1, 3, 9, 2, 4, 8, 5, 6],
[9, 6, 1, 5, 3, 7, 2, 8, 4],
[2, 8, 7, 4, 1, 9, 6, 3, 5],
[3, 4, 5, 2, 8, 6, 1, 7, 9]]
[ [ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ] ]
//actual
[ [ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ] ]
[ [ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ],
[ 1, 2, 3, 4, 5, 6, 7, 8, 9 ] ]
https://stackoverflow.com/questions/56351341
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