JSFiddle - React, Tailwind, and code Playground

JavaScript

links = [];
links[0] = 'foo';
links[1] = 'bar';
links[2] = 'foobar';
links[3] = 'a_herring';
links[4] = 'a_shrubery';

order = []; //loaded from JSON, works has the numbers 1 2 3 or 4 as values
           //in this case:
order[0] = 1;
order[1] = 2;
order[2] = 4;
order[3] = false;
order[4] = 3;

    printOrder = [];
    
for(x in order){        
   if(order[x]){
    printOrder[order[x]]=links[x]
    //remember that in this case order[0] would
}
}

    console.log(printOrder);