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);
}
}
}

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