Kaedah pelaksanaan JS beberapa algoritma pengisihan klasik_Pengetahuan asas

1. Isih gelembung

function BubbleSort(array) {
  var length = array.length;
  for (var i = length - 1; i > 0; i--) { //用于缩小范围
    for (var j = 0; j < i; j++) { //在范围内进行冒泡，在此范围内最大的一个将冒到最后面
      if (array[j] > array[j+1]) { 
        var temp = array[j];
        array[j] = array[j+1];
        array[j+1] = temp;
      }
    }
    console.log(array);
    console.log("-----------------------------");
  }
  return array;
}


var arr = [10,9,8,7,7,6,5,11,3];
var result = BubbleSort(arr);
console.log(result); 
/*
[ 9, 8, 7, 7, 6, 5, 10, 3, 11 ]
-----------------------------
[ 8, 7, 7, 6, 5, 9, 3, 10, 11 ]
-----------------------------
[ 7, 7, 6, 5, 8, 3, 9, 10, 11 ]
-----------------------------
[ 7, 6, 5, 7, 3, 8, 9, 10, 11 ]
-----------------------------
[ 6, 5, 7, 3, 7, 8, 9, 10, 11 ]
-----------------------------
[ 5, 6, 3, 7, 7, 8, 9, 10, 11 ]
-----------------------------
[ 5, 3, 6, 7, 7, 8, 9, 10, 11 ]
-----------------------------
[ 3, 5, 6, 7, 7, 8, 9, 10, 11 ]
-----------------------------
[ 3, 5, 6, 7, 7, 8, 9, 10, 11 ]
*/

2. Pilih pengisihan

function SelectionSort(array) {
  var length = array.length;
  for (var i = 0; i < length; i++) { //缩小选择的范围
    var min = array[i]; //假定范围内第一个为最小值
    var index = i; //记录最小值的下标
    for (var j = i + 1; j < length; j++) { //在范围内选取最小值
      if (array[j] < min) {
        min = array[j];
        index = j;
      }
    }
    if (index != i) { //把范围内最小值交换到范围内第一个
      var temp = array[i];
      array[i] = array[index];
      array[index] = temp;
    }
    console.log(array);
    console.log("---------------------");
  }
  return array;
}

var arr = [ 1, 10, 100, 90, 65, 5, 4, 10, 2, 4 ];
var result = SelectionSort(arr);
console.log(result);
/*
[ 1, 10, 100, 90, 65, 5, 4, 10, 2, 4 ]
---------------------
[ 1, 2, 100, 90, 65, 5, 4, 10, 10, 4 ]
---------------------
[ 1, 2, 4, 90, 65, 5, 100, 10, 10, 4 ]
---------------------
[ 1, 2, 4, 4, 65, 5, 100, 10, 10, 90 ]
---------------------
[ 1, 2, 4, 4, 5, 65, 100, 10, 10, 90 ]
---------------------
[ 1, 2, 4, 4, 5, 10, 100, 65, 10, 90 ]
---------------------
[ 1, 2, 4, 4, 5, 10, 10, 65, 100, 90 ]
---------------------
[ 1, 2, 4, 4, 5, 10, 10, 65, 100, 90 ]
---------------------
[ 1, 2, 4, 4, 5, 10, 10, 65, 90, 100 ]
---------------------
[ 1, 2, 4, 4, 5, 10, 10, 65, 90, 100 ]
---------------------
[ 1, 2, 4, 4, 5, 10, 10, 65, 90, 100 ]
*/

3. Isih sisipan

function InsertionSort(array) {
  var length = array.length;
  for (var i = 0; i < length - 1; i++) {
    //i代表已经排序好的序列最后一项下标
    var insert = array[i+1];
    var index = i + 1;//记录要被插入的下标
    for (var j = i; j >= 0; j--) {
      if (insert < array[j]) {
        //要插入的项比它小，往后移动
        array[j+1] = array[j];
        index = j;
      }
    }
    array[index] = insert;
    console.log(array);
    console.log("-----------------------");
  }
  return array;
}

var arr = [100,90,80,62,80,8,1,2,39];
var result = InsertionSort(arr);
console.log(result);
/*
[ 90, 100, 80, 62, 80, 8, 1, 2, 39 ]
-----------------------
[ 80, 90, 100, 62, 80, 8, 1, 2, 39 ]
-----------------------
[ 62, 80, 90, 100, 80, 8, 1, 2, 39 ]
-----------------------
[ 62, 80, 80, 90, 100, 8, 1, 2, 39 ]
-----------------------
[ 8, 62, 80, 80, 90, 100, 1, 2, 39 ]
-----------------------
[ 1, 8, 62, 80, 80, 90, 100, 2, 39 ]
-----------------------
[ 1, 2, 8, 62, 80, 80, 90, 100, 39 ]
-----------------------
[ 1, 2, 8, 39, 62, 80, 80, 90, 100 ]
-----------------------
[ 1, 2, 8, 39, 62, 80, 80, 90, 100 ]
*/

4. Isih bukit

function ShellSort(array) {
  var length = array.length;
  var gap = Math.round(length / 2);
  while (gap > 0) {
    for (var i = gap; i < length; i++) {
      var insert = array[i];
      var index = i;
      for (var j = i; j >= 0; j-=gap) {
        if (insert < array[j]) {
          array[j+gap] = array[j];
          index = j;
        }
      }
      array[index] = insert;
    }
    console.log(array);
    console.log("-----------------------");
    gap = Math.round(gap/2 - 0.1);
  }
  return array;
}

var arr = [ 13, 14, 94, 33, 82, 25, 59, 94, 65, 23, 45, 27, 73, 25, 39, 10 ];
var result = ShellSort(arr);
console.log(result); 
/*
[ 13, 14, 45, 27, 73, 25, 39, 10, 65, 23, 94, 33, 82, 25, 59, 94 ]
-----------------------
[ 13, 14, 39, 10, 65, 23, 45, 27, 73, 25, 59, 33, 82, 25, 94, 94 ]
-----------------------
[ 13, 10, 39, 14, 45, 23, 59, 25, 65, 25, 73, 27, 82, 33, 94, 94 ]
-----------------------
[ 10, 13, 14, 23, 25, 25, 27, 33, 39, 45, 59, 65, 73, 82, 94, 94 ]
-----------------------
[ 10, 13, 14, 23, 25, 25, 27, 33, 39, 45, 59, 65, 73, 82, 94, 94 ]
*/

5. Isih gabung

function MergeSort(array) {
  var length = array.length;
  if (length <= 1) {
    return array;
  } else {
    var num = Math.ceil(length/2);
    var left = MergeSort(array.slice(0, num));
    var right = MergeSort(array.slice(num, length));
    return merge(left, right);
  }
}

function merge(left, right) {
  console.log(left);
  console.log(right);
  var a = new Array();
  while (left.length > 0 && right.length > 0) {
    if (left[0] <= right[0]) {
      var temp = left.shift();
      a.push(temp);
    } else {
      var temp = right.shift();
      a.push(temp);
    }
  }
  if (left.length > 0) {
    a = a.concat(left);
  }
  if (right.length > 0) {
    a = a.concat(right);
  }
  console.log(a);
  console.log("-----------------------------");
  return a;
}

var arr = [ 13, 14, 94, 33, 82, 25, 59, 94, 65, 23, 45, 27, 73, 25, 39, 10 ];
var result = MergeSort(arr);
console.log(result);
/*
[ 13 ]
[ 14 ]
[ 13, 14 ]
-----------------------------
[ 94 ]
[ 33 ]
[ 33, 94 ]
-----------------------------
[ 13, 14 ]
[ 33, 94 ]
[ 13, 14, 33, 94 ]
-----------------------------
[ 82 ]
[ 25 ]
[ 25, 82 ]
-----------------------------
[ 59 ]
[ 94 ]
[ 59, 94 ]
-----------------------------
[ 25, 82 ]
[ 59, 94 ]
[ 25, 59, 82, 94 ]
-----------------------------
[ 13, 14, 33, 94 ]
[ 25, 59, 82, 94 ]
[ 13, 14, 25, 33, 59, 82, 94, 94 ]
-----------------------------
[ 65 ]
[ 23 ]
[ 23, 65 ]
-----------------------------
[ 45 ]
[ 27 ]
[ 27, 45 ]
-----------------------------
[ 23, 65 ]
[ 27, 45 ]
[ 23, 27, 45, 65 ]
-----------------------------
[ 73 ]
[ 25 ]
[ 25, 73 ]
-----------------------------
[ 39 ]
[ 10 ]
[ 10, 39 ]
-----------------------------
[ 25, 73 ]
[ 10, 39 ]
[ 10, 25, 39, 73 ]
-----------------------------
[ 23, 27, 45, 65 ]
[ 10, 25, 39, 73 ]
[ 10, 23, 25, 27, 39, 45, 65, 73 ]
-----------------------------
[ 13, 14, 25, 33, 59, 82, 94, 94 ]
[ 10, 23, 25, 27, 39, 45, 65, 73 ]
[ 10, 13, 14, 23, 25, 25, 27, 33, 39, 45, 59, 65, 73, 82, 94, 94 ]
-----------------------------
[ 10, 13, 14, 23, 25, 25, 27, 33, 39, 45, 59, 65, 73, 82, 94, 94 ]
*/

6. Isih pantas

function QuickSort(array) {
  var length = array.length;
  if (length <= 1) {
    return array;
  } else {
    var smaller = [];
    var bigger = [];
    var base = [array[0]];
    for (var i = 1; i < length; i++) {
      if (array[i] <= base[0]) {
        smaller.push(array[i]);
      } else {
        bigger.push(array[i]);
      }
    }
    console.log(smaller.concat(base.concat(bigger)));
    console.log("-----------------------");
    return QuickSort(smaller).concat(base.concat(QuickSort(bigger)));
  }
}


var arr = [ 8, 10, 100, 90, 65, 5, 4, 10, 2, 4 ];
var result = QuickSort(arr);
console.log(result);
/*
[ 5, 4, 2, 4, 8, 10, 100, 90, 65, 10 ]
-----------------------
[ 4, 2, 4, 5 ]
-----------------------
[ 2, 4, 4 ]
-----------------------
[ 2, 4 ]
-----------------------
[ 10, 10, 100, 90, 65 ]
-----------------------
[ 90, 65, 100 ]
-----------------------
[ 65, 90 ]
-----------------------
[ 2, 4, 4, 5, 8, 10, 10, 65, 90, 100 ]
*/

Kaedah pelaksanaan JS di atas bagi beberapa algoritma pengisihan klasik adalah semua kandungan yang dikongsi oleh editor. Saya harap ia boleh memberi anda rujukan dan saya harap anda akan menyokong Script Home.