String Polyfills and Common Interview Methods in JavaScript

The provided content covers a wide range of topics related to JavaScript strings, including polyfills for ES6 string methods and common interview problems. Below is an organized summary with additional insights and examples:

Polyfills for ES6 String Methods

startsWith(), endsWith(), and includes()

These methods are used to check if a string starts with, ends with, or includes another string.

Polyfill Example:

javascript
 
1String.prototype.myStartsWith = function(search) {
2    return this.slice(0, search.length) === search;
3};
4
5String.prototype.myEndsWith = function(search) {
6    return this.slice(this.length - search.length) === search;
7};
8
9String.prototype.myIncludes = function(search) {
10    return this.indexOf(search) !== -1;
11};

repeat()

This method repeats a string a specified number of times.

Polyfill Example:

javascript
 
1String.prototype.myRepeat = function(count) {
2    if (count < 0 || count === Infinity) throw new RangeError("Invalid count value");
3    let result = "";
4    for (let i = 0; i < Math.floor(count); i++) {
5        result += this;
6    }
7    return result;
8};
9
10[Read the full article at DEV Community](https://dev.to/satyasootar/string-polyfills-and-common-interview-methods-in-javascript-5bhn)
11
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13
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