join an array of characters into a string in typescript

In Typescript, you can join an array of characters into a string by using the join() method of the Array class. The join() method concatenates all the elements of an array into a string, with an optional separator between each element.

Here is an example:

index.ts
const characters: string[] = ['H', 'e', 'l', 'l', 'o'];
const str: string = characters.join('');
console.log(str); // Output: "Hello"
134 chars
4 lines

In this example, we create an array of characters (['H', 'e', 'l', 'l', 'o']) and then use the join() method to concatenate them into a single string (Hello). Because we don't pass in a separator to the join() method, it defaults to using an empty string between each element.

Alternatively, you can pass a separator to the join() method to separate each element in the resulting string. For example:

index.ts
const characters: string[] = ['H', 'e', 'l', 'l', 'o'];
const str: string = characters.join('-');
console.log(str); // Output: "H-e-l-l-o"
139 chars
4 lines

In this example, we pass in a hyphen (-) as the separator to the join() method, resulting in a string with hyphens between each character.