radix sort

# Python program for implementation of Radix Sort 
  
# A function to do counting sort of arr[] according to 
# the digit represented by exp. 
def countingSort(arr, exp1): 
  
    n = len(arr) 
  
    # The output array elements that will have sorted arr 
    output = [0] * (n) 
  
    # initialize count array as 0 
    count = [0] * (10) 
  
    # Store count of occurrences in count[] 
    for i in range(0, n): 
        index = (arr[i]/exp1) 
        count[ (index)%10 ] += 1
  
    # Change count[i] so that count[i] now contains actual 
    #  position of this digit in output array 
    for i in range(1,10): 
        count[i] += count[i-1] 
  
    # Build the output array 
    i = n-1
    while i>=0: 
        index = (arr[i]/exp1) 
        output[ count[ (index)%10 ] - 1] = arr[i] 
        count[ (index)%10 ] -= 1
        i -= 1
  
    # Copying the output array to arr[], 
    # so that arr now contains sorted numbers 
    i = 0
    for i in range(0,len(arr)): 
        arr[i] = output[i] 
  
# Method to do Radix Sort 
def radixSort(arr): 
  
    # Find the maximum number to know number of digits 
    max1 = max(arr) 
  
    # 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 
    exp = 1
    while max1/exp > 0: 
        countingSort(arr,exp) 
        exp *= 10
  
# Driver code to test above 
arr = [ 170, 45, 75, 90, 802, 24, 2, 66] 
radixSort(arr) 
  
for i in range(len(arr)): 
    print(arr[i])

function getDigit(num, i) {
  return Math.floor(Math.abs(num) / Math.pow(10,i)) % 10
}

function digitCount(num) {
  if(num === 0 ) return 1
  return Math.floor(Math.log10(Math.abs(num))) + 1
}

function mostDigitCount(nums) {
  let maxDigit = 0
  for(let i = 0;i< nums.length;i++) {
    maxDigit = Math.max(maxDigit, digitCount(nums[i]))
  }
  return maxDigit
}

function Radix(nums){
  let maxDigitCount = mostDigitCount(nums)
  for(let k=0; k< maxDigitCount; k++) {
    let digitbucket = Array.from({length:10} , () => [])
    for(let i=0; i< nums.length; i++) {
      let digit = getDigit(nums[i], k)
      digitbucket[digit].push(nums[i])
    }
    nums = [].concat(...digitbucket)
  }
  return nums
}

console.log(Radix([23,123, 23333,444444,55555555]))

Radix-Sort(A, d)
       for j = 1 to d do
            int count[10] = {0};
            for i = 0 to n do
                count[key of(A[i]) in pass j]++
            for k = 1 to 10 do
                count[k] = count[k] + count[k-1]
            for i = n-1 downto 0 do
                result[ count[key of(A[i])] ] = A[j]
                count[key of(A[i])]--
            for i=0 to n do
                A[i] = result[i]
       end for(j)
 end func 

import java.io.*; 
import java.util.*; 
class Radix { 
           static int getMax(int arr[], int n){ 
           int mx = arr[0]; 
           for (int i = 1; i < n; i++) 
                 if (arr[i] > mx) 
                        mx = arr[i]; 
           return mx; 
    } 
   static void countSort(int arr[], int n, int exp) 
    {   
           int output[] = new int[n]; 
           int i; 
           int count[] = new int[10]; 
           Arrays.fill(count,0);
           for (i = 0; i < n; i++) 
                   count[ (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[ (arr[i]/exp)%10 ] - 1] = arr[i]; 
                   count[ (arr[i]/exp)%10 ]--; 
        }
           for (i = 0; i < n; i++) 
                   arr[i] = output[i]; 
    } 
   static void radixsort(int arr[], int n) 
       { // Find the maximum number to know number of digits 
           int m = getMax(arr, n);
           for (int exp = 1; m/exp > 0; exp *= 10) 
                  countSort(arr, n, exp); 
    } 
   static void print(int arr[], int n) 
    { 
        for (int i=0; i<n; i++) 
               System.out.print(arr[i]+" "); 
    } 
    public static void main (String[] args) 
    {    int arr[] = {170, 45, 75, 90, 802, 24, 2, 66}; 
         int n = arr.length; 
         radixsort(arr, n); 
         print(arr, n); 
    } 
} 
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