排序方式
置换
Array.prototype.swap = function(i, j) { var temp = this[i]; this[i] = this[j]; this[j] = temp; }
算法 - 冒泡排序
Array.prototype.bubbleSort = function(){ for (var i = this.length - 1; i > 0; --i){ for (var j = 0; j < i; ++j){ if (this[j] > this[j + 1]) this.swap(j, j + 1); } } }
算法 - 选择排序
Array.prototype.selectionSort = function(){ for (var i = 0; i < this.length; ++i){ var index = i; for (var j = i + 1; j < this.length; ++j) { if (this[j] < this[index]) index = j; } this.swap(i, index); } }
算法 - 插入排序
Array.prototype.insertionSort = function(){ for (var i = 1; i < this.length; ++i){ var j = i, value = this[i]; while (j > 0 && this[j - 1] > value) { this[j] = this[j - 1]; --j; } this[j] = value; } }
算法 - 希尔排序
Array.prototype.shellSort = function(){ for (var step = this.length >> 1; step > 0; step >>= 1){ for (var i = 0; i < step; ++i){ for (var j = i + step; j < this.length; j += step){ var k = j, value = this[j]; while (k >= step && this[k - step] > value){ this[k] = this[k - step]; k -= step; } this[k] = value; } } } }
算法 - 快速排序(堆栈)
Array.prototype.stackQuickSort = function() { var stack = [0, this.length - 1]; while (stack.length > 0){ var e = stack.pop(), s = stack.pop(); if (s >= e) continue; this.swap((s + e) >> 1, e); var index = s - 1; for (var i = s; i <= e; ++i){ if (this[i] <= this[e]) this.swap(i, ++index); } stack.push(s, index - 1, index + 1, e); } }
算法 - 归并排序
Array.prototype.mergeSort = function(s, e, b){ if (s == null) s = 0; if (e == null) e = this.length - 1; if (b == null) b = new Array(this.length); if (s >= e) return; var m = (s + e) >> 1; this.mergeSort(s, m, b); this.mergeSort(m + 1, e, b); for (var i = s, j = s, k = m + 1; i <= e; ++i){ b[i] = this[(k > e || j <= m && this[j] < this[k]) ? j++ : k++]; } for (var i = s; i <= e; ++i) this[i] = b[i]; }
算法 - 堆排序
Array.prototype.heapSort = function() { for (var i = 1; i < this.length; ++i){ for (var j = i, k = (j - 1) >> 1; k >= 0; j = k, k = (k - 1) >> 1) { if (this[k] >= this[j]) break; this.swap(j, k); } } for (var i = this.length - 1; i > 0; --i){ this.swap(0, i); for (var j = 0, k = (j + 1) << 1; k <= i; j = k, k = (k + 1) << 1){ if (k == i || this[k] < this[k - 1]) --k; if (this[k] <= this[j]) break; this.swap(j, k); } } }