Move an array element from one array position to another

Question

I\'m having a hard time figuring out how to move an array element. For example, given the following:

var arr = [ \'a\', \'b\', \'c\', \'d\', \'e\'];
<         


        

Answer 1

var ELEMS = ['a', 'b', 'c', 'd', 'e'];
/*
    Source item will remove and it will be placed just after destination
*/
function moveItemTo(sourceItem, destItem, elements) {
    var sourceIndex = elements.indexOf(sourceItem);
    var destIndex = elements.indexOf(destItem);
    if (sourceIndex >= -1 && destIndex > -1) {
        elements.splice(destIndex, 0, elements.splice(sourceIndex, 1)[0]);
    }
    return elements;
}
console.log('Init: ', ELEMS);
var result = moveItemTo('a', 'c', ELEMS);
console.log('BeforeAfter: ', result);