public/subjects/string_permutation

string_permutation

Instructions

Define the function is_permutation that returns true if:

• the string s1 is a permutation of s2, otherwise it returns false.
• s1 is a permutation of s2 if all the elements in s1 appear the same number of times in s2 and all the characters in s1 appear in s2 even if they are in different order.

Notions

hash maps

Expected Function

pub fn is_permutation(s1: &str, s2: &str) -> bool {
}

Usage

Here is a program to test your function.

use string_permutation::*;

fn main() {
	let word = "thought";
	let word1 = "thougth";
	println!(
		"Is `{}` a permutation of `{}`? = {}",
		word,
		word1,
		is_permutation(word, word1)
	);
}

And its output

$ cargo run
Is `thought` a permutation of `thougth`? = true
$