Array.prototype.swap = function(i, j) {
var temp = this[i];
this[i] = this[j];
this[j] = temp;
}
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);
}
}
}
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);
}
}
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;
}
}
谢尔排序:
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;
}
}
}
}
快速排序(递归):
Array.prototype.quickSort = function(s, e) {
if (s == null) s = 0;
if (e == null) e = this.length – 1;
if (s >= e) return;
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);
}
this.quickSort(s, index - 1);
this.quickSort(index + 1, e);
}
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);
}
}
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];
}
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);
}
}
}