function that takes any question and returns a randomly selected item from an array code example
Example 1: function that takes any question and returns a randomly selected item from an array
function randomNoRepeats(array) {
var copy = array.slice(0);
return function() {
if (copy.length < 1) { copy = array.slice(0); }
var index = Math.floor(Math.random() * copy.length);
var item = copy[index];
copy.splice(index, 1);
return item;
};
}
var chooser = randomNoRepeats(['Foo', 'Bar', 'Gah']);
chooser(); // => "Bar"
chooser(); // => "Foo"
chooser(); // => "Gah"
chooser(); // => "Foo" -- only repeats once all items are exhausted.
Example 2: function that takes any question and returns a randomly selected item from an array
var a = ["Roger", "Russell", "Clyde", "Egbert", "Clare", "Bobbie", "Simon", "Elizabeth", "Ted", "Caroline"];
var chooseName = function () {
var unique = true;
num = Math.floor(Math.random() * a.length - 5);
name = a.splice(num,1);
a.push(name);
}
window.addEventListener("keypress", function (e) {
var keycode = e.keyCode;
if (keycode == 13) {
chooseName();
}
}, false);