JSFiddle - React, Tailwind, and code Playground

by cincodenada

HTML

In: <span id="in"></span><br/>
Out: <span id="out"></span>

JavaScript

var testarr = ["one","two","three"];
var curpos = 2; // This represents some externally-controlled position in the array

var invar = [];
var outvar = [];
for(i in testarr) {
    if(i === curpos) {
        invar.push(testarr[i]);
    } else {
        outvar.push(testarr[i]);
    }
}

document.getElementById('in').innerHTML = invar.join(',');
document.getElementById('out').innerHTML = outvar.join(',');