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I’ve been playing with random array arrangements and was wondering if there is a way to pull word from the array only once. So every time you click on the changeWorld button then it will randomly draw from the array list until all the words where used only once?
Learning JavaScript so I don't need anyone to write me the code, just want get pushed in the right direction and know if it is possable. There isn't anything I can find that address the concept.
<body>
<button id="change-world-btn">Change World</button>
Hello <span class="world-name">World!</span><br />
<script type="text/javascript">
var worlds = new Array ("Pluto", "Mars", "Saturn", "Jupiter", "Uranus");
function newWorld() {
return worlds[Math.floor(Math.random() * worlds.length)];
}
elements = document.getElementsByTagName('span');
document.getElementById('change-world-btn').onclick = function() {
world = newWorld();
for(var i = 0, el; el = elements[i++];) {
if(el.className == 'world-name') {
el.innerHTML = world;
}
}
};
</script>
</body>
218
asked Feb 17 '26 01:02
Remove the words that you have used from the array:
function newWorld() {
var index = Math.floor(Math.random() * worlds.length);
var world = worlds[index];
worlds.splice(index, 1);
return world;
}
You might also want to check if the array is empty first.
146
This sounds like a job for a stack or a queue. You can take your array, shuffle to get your "randomness", push each element from your array into a stack or queue, then pop off an element everytime the user clicks your button. Edit: Here is a small example of a stack.
var stack=new Array();
stack.push("A");
stack.push("B");
stack.push("C");
alert(stack.pop());
alert(stack.pop());
alert(stack.pop());
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