js 3种归并操作的实例代码

第一种：
代码如下:
/**良哥的*/
function merge(a, b) {
    var aLen = a.length,
        bLen = b.length,
        maxLen = Math.max(aLen, bLen),
        sumLen = aLen + bLen,
        result = [],
        ap = 0,
        bp = 0;

     while (result.length < sumLen) {
        if (ap < aLen && bp < bLen) {
            if(a[ap] > b[bp]){
                result.push(b[bp++]);
            } else {
                result.push(a[ap++]);
            }
        } else if (!(ap < aLen)){
            while(bp < bLen){
                result.push(b[bp++]);
            }
        } else if (!(bp < bLen)){
            while(ap < aLen){
                result.push(a[ap++]);
            }
        }
    }
    return result;
}

第二种：
代码如下:
/**鲁军*/
function merge(arr1, arr2){

    var i = 0;
    var j = 0;
    var c = 0;
    var k;
    var len1 = arr1.length;
    var len2 = arr2.length;
    var arr = [];
    for(;i<len1 && j<len2;){
        if( arr1[i] > arr2[j]  ){
            arr.push( arr2[j] );
            j++;
        }else{
            arr.push( arr1[i] );
            i++;
        }
        //if(i==len1 || j==len2){
        //    break;
        //}
    }