How to find the Indices of All Occurrences of Substring in TypeScript - Step by Step Examples

How to find the Indices of All Occurrences of Substring in TypeScript ?

Answer

To find the indices of all occurrences of a substring in TypeScript, you can use a loop with the indexOf method to find all occurrences and store their indices in an array.

✐ Examples

1 Find Indices of All Occurrences in String

In this example,

We create a string variable str with a string value.
We use a loop with the indexOf method to find all occurrences of a specific substring within str and store their indices in an array.
Finally, we print the array of indices.

TypeScript Program

let str: string = 'Hello Hello Hello';
let substr: string = 'Hello';
let indices: number[] = [];
let index: number = str.indexOf(substr);
while (index !== -1) {
    indices.push(index);
    index = str.indexOf(substr, index + 1);
}
console.log('Indices of all occurrences:', indices);

Output

Indices of all occurrences: [ 0, 6, 12 ]

2 Find Indices of All Occurrences in Another String

In this example,

We create two string variables str1 and str2 with different values.
We use a loop with the indexOf method to find all occurrences of str2 within str1 and store their indices in an array.
Finally, we print the array of indices.

TypeScript Program

let str1: string = 'apple banana cherry banana';
let str2: string = 'banana';
let indices: number[] = [];
let index: number = str1.indexOf(str2);
while (index !== -1) {
    indices.push(index);
    index = str1.indexOf(str2, index + 1);
}
console.log('Indices of all occurrences:', indices);

Output

Indices of all occurrences: [ 6, 20 ]

Summary

In this tutorial, we learned How to find the Indices of All Occurrences of Substring in TypeScript language with well detailed examples.

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How to find the Indices of All Occurrences of Substring in TypeScript - Step by Step Examples

How to find the Indices of All Occurrences of Substring in TypeScript ?

Answer

✐ Examples

1 Find Indices of All Occurrences in String

TypeScript Program

Output

2 Find Indices of All Occurrences in Another String

TypeScript Program

Output

Summary

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