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radix.js
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radix.js
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<script>
// Radix sort Javascript implementation
// A utility function to get maximum value in arr[]
function getMax(arr,n)
{
let mx = arr[0];
for (let i = 1; i < n; i++)
if (arr[i] > mx)
mx = arr[i];
return mx;
}
// A function to do counting sort of arr[] according to
// the digit represented by exp.
function countSort(arr,n,exp)
{
let output = new Array(n); // output array
let i;
let count = new Array(10);
for(let i=0;i<10;i++)
count[i]=0;
// Store count of occurrences in count[]
for (i = 0; i < n; i++)
count[Math.floor(arr[i] / exp) % 10]++;
// Change count[i] so that count[i] now contains
// actual position of this digit in output[]
for (i = 1; i < 10; i++)
count[i] += count[i - 1];
// Build the output array
for (i = n - 1; i >= 0; i--) {
output[count[Math.floor(arr[i] / exp) % 10] - 1] = arr[i];
count[Math.floor(arr[i] / exp) % 10]--;
}
// Copy the output array to arr[], so that arr[] now
// contains sorted numbers according to current digit
for (i = 0; i < n; i++)
arr[i] = output[i];
}
// The main function to that sorts arr[] of size n using
// Radix Sort
function radixsort(arr,n)
{
// Find the maximum number to know number of digits
let m = getMax(arr, n);
// Do counting sort for every digit. Note that
// instead of passing digit number, exp is passed.
// exp is 10^i where i is current digit number
for (let exp = 1; Math.floor(m / exp) > 0; exp *= 10)
countSort(arr, n, exp);
}
// A utility function to print an array
function print(arr,n)
{
for (let i = 0; i < n; i++)
document.write(arr[i] + " ");
}
/*Driver Code*/
let arr=[170, 45, 75, 90, 802, 24, 2, 66];
let n = arr.length;
// Function Call
radixsort(arr, n);
print(arr, n);
// This code is contributed by rag2127
</script>