There is a large pile of socks that must be paired by color. Given an array of integers representing the color of each sock, determine how many pairs of socks with matching colors there are.
Large pile of socksThere is a large pile of socks that must be paired by color. Given an array of integers representing the color of each sock, determine how many pairs of socks with matching colors there are.
Large pile of socksFor example, there are n=7 socks with colors ar=[1,2,1,2,1,3,2]. There is one pair of color 1 and one of color 2.
function sockMerchant(n, ar) {
//Need to initiate a count variable to count pairs and return the value
let count = 0
//sort the given array
ar = ar.sort()
//loop through the sorted array
for (let i=0; i < n-1; i++) {
//if the current item equals to the next item
if(ar[i] === ar[i+1]){
//then that's a pair, increment our count variable
count++
//also increment i to skip the next item
i+=1
}
}
//return the count value
return count
}Copyright © 2021 Codeinu
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