How do I assign random members into a given group number?

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I just started learning JavaScript and I'm new to it. I have this HTML. What this do is, first select how many groups that would be created then input names on the first textarea, then after i click the random button it will automatically distribute the names that you input on the textarea into the groups that would be created. The names are separated by a text splitter which is a comma. Please help guys :( thanks a bunch.

HERE IS THE CODE

HTML

<!DOCTYPE html>
<meta charset="UTC-8">
<html>
	<script>
		//javascript goes here
	</script>
<head>
	
</head>

<body>

	<h2>Add a Group</h2>

<hr>
	
	<table>
		<td>
			<form id="grp">
				Groups:
				<br>
				<input type="number" name="grpmembers" min="1" max="10" id="grps">
			</form>
		</td>
	</table>

	<textarea id="inputNames" rows="10" cols="40"></textarea>
    <br>
	<input type="button" name="Random" value="Random" onclick="textSplitter()">  
	<br>
	<textarea disabled id="results" rows="10" cols="40"></textarea>
    <br>

	<button>Finish</button>

</body>

</html>

Posted 8-Apr-15 16:28pm

Member 11592151

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Comments

Afzaal Ahmad Zeeshan 8-Apr-15 23:12pm

What is the problem?

Member 11592151 9-Apr-15 1:14am

i want to randomly distribute the names in the text area to a group. for example if i selected 3 groups and there are 10 names. it will be automatically distributed. like Group 1: 1,2,3,4 Group 2: 5,6,7 Group 3: 8,9,10. but i can't seem to get it work :(

Peter Leow 9-Apr-15 1:17am

Where to put the split names?

Member 11592151 9-Apr-15 1:23am

the names will be assigned into the created group

Peter Leow 9-Apr-15 1:30am

You have not shown any JavaScript code?

Member 11592151 9-Apr-15 1:32am

oh sorry about that. here is my javascript code but something is wrong about the functions.

function textSplitter() {
var input = document.getElementById("inputNames").value;
var names = input.split(",");

var groupSize = document.getElementById("grps").value;
var groupCount = Math.ceil(names.length / groupSize);
var groups = [];

for (var i = 0; i < groupSize; i++) {
var group = [];
for (var j = 0; j < names.length; j++) {
var random = Math.floor(Math.random() * names.length);
var name = names[random];
if (name != undefined) {
group.push(name);
names.splice(names.indexOf(name), 1);
}
}
group.sort();
groups.push(group);
}
printGroups(groups);
}

function printGroups(group) {
var output = document.getElementById("results");
output.value = "";
for (var i = 0; i < group.length; i++) {
var currentGroup = "";
for (var j = 0; j < group[i].length; j++) {
currentGroup = group[i].join(", ");
}
output.value += currentGroup + "\r";
}
}

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sergey Alexandrovich Kryukov · Answer 1 · 2015-04-08T20:11:00

Let's see. This is a method of getting a random value in the interval between min and max:

JavaScript

function randomInt(min, max) { return Math.floor(Math.random() * (max - min + 1)) + min; }

The numbers will have statistically uniform distribution withing the said interval.

Now, if you have a set of some objects, representing, say, a group, you can put them on an array var objects = [object1, object2, ...]; it does not matter what they are. You can choose one of these objects using the array element syntax, [someIndex]. If your generate a random value for someIndex, you will get an object randomly chosen from this set. Using this idea, you can solve your problem.

—SA

How do I assign random members into a given group number?

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How do I assign random members into a given group number?

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