夕顔 | 排序虐我千百遍,我待排序如初恋

归并排序

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function mergeSort(arr) {
const length = arr.length;
if (length <= 1) {
return arr;
}
const middle = parseInt(length / 2);
const left = arr.slice(0, middle);
const right = arr.slice(middle);
return merge(mergeSort(left), mergeSort(right));
}

function merge(left, right) {
const result = [];
while (left.length && right.length) {
if (left[0] <= right[0]) {
result.push(left.shift());
} else {
result.push(right.shift());
}
}
while (left.length) {
result.push(left.shift());
}
while (right.length) {
result.push(right.shift());
}

return result;
}
如何优雅的要钱