Move an item in array to a position.

moveto.js

moveTo = function (arr, value, position) {
    var index = arr.indexOf(value), newPos = position - 1, temp = arr[newPos];
    if (index === -1) return;
    if (newPos >= arr.length || newPos < 0) return;
    if (index === newPos) return;
    arr.splice(newPos, 1, value); // Remove 1 item at newPos insert value
    arr.splice(index, 1, temp); // Remove 1 item at index, insert temp
}

//var a = ['Matt', 'Ralph', 'Jason'];
//var a = [{name:'Matt'}, {name:'Ralph'}, {name:'Jason'}];
//1,2,3 non zero based
//moveTo(a, a[0], 2);
//moveTo(a, a[1], 2); //move ralph to pos 2
//moveTo(a, a[2], 1); //move jason to pos 1
//moveTo(a, a[0], 3); //move matt to pos 3
//console.dir(a);