Duplicate Character Counter in Typescript

Welcome to the Duplicate Character Counter in Typescript page! Here, you'll find the source code for this program as well as a description of how the program works.

Current Solution

const error_msg: string = "Usage: please provide a string"
let str: string = (process.argv.length == 3) ? process.argv[2] : "";
if (str.length == 0) {
    console.log(error_msg);
    process.exit(1);
}

let hash_map: Map<string, number> = new Map<string, number>();
for (let i = 0; i < str.length; i++) {
    let char: string = str[i];
    let count: number = hash_map.get(char) || 0;
    hash_map.set(char, count + 1);
}
let has_duplicate: boolean = false;
hash_map.forEach((value, key) => {
    if (value > 1) {
        has_duplicate = true;
        console.log(`${key}: ${value}`);
    }
});

if (!has_duplicate) {
    console.log("No duplicate characters");
}

Duplicate Character Counter in Typescript was written by:

• Vipin Yadav

If you see anything you'd like to change or update, please consider contributing.

How to Implement the Solution

No 'How to Implement the Solution' section available. Please consider contributing.

How to Run the Solution

No 'How to Run the Solution' section available. Please consider contributing.