JSFiddle - React, Tailwind, and code Playground

by jongobar

HTML

<pre id="out"></pre>

JavaScript

var dbg=[];
dbg.targetNode=document.getElementById("out");
dbg.out=function (msg){
    if(msg){
        this.targetNode.textContent=msg; 
        return;   
    }
    this.targetNode.textContent=this.join('\n');
};

var array1 = ['zzzzz', 'aaaaaa', 'ccccc'];
var array2 = [3, 7, 1];
var indices=arrVirtualSortGetIndices(array1);
var array2sorted=arrReorderByIndices(array2,indices);
dbg.push(array2sorted);
dbg.out();



function arrVirtualSortGetIndices(array,fnCompare){
    var index=array.map(function(e,i,a){return i;});
    fnCompare=fnCompare || defaultStringCompare;
    var idxCompare=function (aa,bb){return fnCompare(array[aa],array[bb]);};
    index.sort(idxCompare);
    return index;

    function defaultStringCompare(aa,bb){
        if(aa<bb)return -1;
        if(bb<aa)return 1;
        return 0;
    }
    function defaultNumericalCompare(aa,bb){
        return aa-bb;
    }   
}

function arrReorderByIndices(array,indices){
    return array.map(
        function(el,ix,ar){
            return ar[indices[ix]];
        }
    );
}