Common algorithms for Javascript implementation (e.g. Bubble fast pigeon nest parity etc.)

  • 2020-03-30 02:44:18
  • OfStack


l = [6, 2, 4, 1, 98, 34, 5, 9, 23, 8, 10, 32]

       
//Bubble sort


       
//Quick sort
/*function quickSort(arr) {
    if (arr.length <= 1) return arr;
    var left = [],
        right = [],
        middle = [];
    var mid = arr[Math.floor(arr.length / 2)]
    for (var i = 0; i < arr.length; i++) {
        if (arr[i] < mid) {
            left.push(arr[i]);
        } else if (arr[i] > mid) {
            right.push(arr[i]);
        } else {
            middle.push(mid);
        }
    }
    return [].concat(quickSort(left), middle, quickSort(right))

}

var results = quickSort(l)
console.log(results)

       
*/

//Selection sort


       
//Insertion sort


//Bucket sort


//Pigeon nest sort, non-negative integer


//Merge sort
/*function mergeSort(arr) {
    if (arr.length <= 1) return arr;
    var mid = Math.floor(arr.length / 2);
    var left = MergeSort(arr.slice(0, mid));
    var right = MergeSort(arr.slice(mid));
    var result = [];

    while (left.length && right.length) {
        if (left[left.length - 1] <= right[0]) {
            result = result.concat(left);
            left = [];
        } else if (right[right.length - 1] < left[0]) {
            result = result.concat(right);
            right = [];
        } else {
            if (right[0] < left[0]) {
                result.push(right.shift());
            } else {
                result.push(left.shift());
            }
        }
    }
    result = result.concat(left, right);

    return result;
}*/

       

/*function mergeSort(arr) {
    var merge = function(left, right) {
        var result = [];
        while (left.length > 0 && right.length > 0) {
            if (left[0] < right[0]) {
                result.push(left.shift());
            } else {
                result.push(right.shift());
            }
        }
        return result.concat(left).concat(right);
    }

    if (arr.length == 1) return arr;
    var middle = Math.floor(arr.length / 2),
        left = arr.slice(0, middle),
        right = arr.slice(middle);
    return merge(mergeSort(left), mergeSort(right));
}

var results = mergeSort(l)
console.log(results)

*/

       
//Heap sort



       

//Parity is arranged



function oddEvenSort(arr) {
    var swaped = true;
    while (swaped) {
        swaped = false;
        for (var i = 0; i < arr.length; i += 2) {
            if (arr[i] > arr[i + 1]) {
                arr[i] = [arr[i + 1], arr[i + 1] = arr[i]][0];
                swaped = true;
            }
        }
        for (var i = 1; i < arr.length; i += 2) {
            if (arr[i] > arr[i + 1]) {
                arr[i] = [arr[i + 1], arr[i + 1] = arr[i]][0];
                swaped = true;
            }
        }
    }
    return arr;
}

var results = oddEvenSort(l)
console.log(results)

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