My solution to a “Daily Coding Problem” that I received in my mail today.

Given a string, determine whether any permutation of it is a palindrome.

For example, `carrace` should return true, since it can be rearranged to form `racecar`, which is a palindrome. `daily` should return false, since there’s no rearrangement that can form a palindrome.

## Daily Coding Problem solution in Typescript,

``````permutationPalindrome(inputStr:string): boolean {
let isPalindrome = true;
if(inputStr == null || inputStr == undefined) {
return false;
}
let occurenceMap = new Map<string, number>();
for(let i = 0; i <  inputStr.length; i++) {
let c = inputStr.charAt(i);
if(occurenceMap.has(c)) {
let count = occurenceMap.get(c) + 1;
occurenceMap.set(c, count);
} else {
occurenceMap.set(c, 1);
}
}
let occurenceCount = 0;
occurenceMap.forEach((count, char) => {
occurenceCount += count %2;
})
return occurenceCount <= 1;
}``````

#### Like the blog? Subscribe for updates

As usual, if you find any of my posts useful support me by  buying or even trying one of my apps on the App Store.

https://mydaytodo.com/apps/

Also, if you can leave a review on the App Store or Google Play Store, that would help too.

Categories: Algorithms