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04-binary.html
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<!-- recursively generate n-binary digits -->
<!DOCTYPE html>
<html>
<head>
<style>
#content
{
padding: 20px;
border: 2px solid black;
background-color: green
}
</style>
</head>
<body>
<div id="content">
Enter number of binary digits to generate
</div>
<input type="text" id="text_digits" />
<input type="button" value="Generate" id="button" />
<script>
var button = document.getElementById('button');
button.onclick = processClick;
var content = document.getElementById('content');
var permutations = '';
function processClick() {
var digits = document.getElementById('text_digits').value;
var content = document.getElementById('content');
content.innerHTML = '';
permutations = '';
if (digits) {
generateBinary(parseInt(digits),'');
} else {
alert('Not a valid input');
}
content.innerHTML = permutations;
}
function generateBinary(num,str) {
if (str.length === num) {
permutations += (str + '</br>');
} else {
generateBinary(num,str+'0');
generateBinary(num,str+'1');
}
}
</script>
</body>
</html>