# StringMethods

This package provides a collection of utility methods for manipulating strings.

## Installation

```bash
npm install stringmethods
```

Methods

• replaceCount(str, oldSubstr, newSubstr, count)

Replaces the first count occurrences of oldSubstr in str with newSubstr.

Usage:

const StringMethods = require("stringmethods");

const str = "hello world hello world";
const newStr = StringMethods.replaceCount(str, "hello", "hi", 2);
console.log(newStr); // Output: hi world hello world

• count(str, substr)

Counts the number of occurrences of substr in str.

Usage:

const StringMethods = require("stringmethods");

const str = "hello world hello world";
const count = StringMethods.count(str, "hello");
console.log(count); // Output: 2

• isAlnum(str)

Checks if str contains only alphanumeric characters (a-z, A-Z, 0-9).

Usage:

const StringMethods = require("stringmethods");

const str1 = "hello123";
const str2 = "hello world";
console.log(StringMethods.isAlnum(str1)); // Output: true
console.log(StringMethods.isAlnum(str2)); // Output: false

• isDigit(str)

Checks if str contains only digits (0-9).

Usage:

const StringMethods = require("stringmethods");

const str1 = "12345";
const str2 = "hello123";
console.log(StringMethods.isDigit(str1)); // Output: true
console.log(StringMethods.isDigit(str2)); // Output: false

• isLower(str)

Checks if str contains only lowercase letters (a-z).

Usage:

const StringMethods = require("stringmethods");

const str1 = "hello";
const str2 = "Hello";
console.log(StringMethods.isLower(str1)); // Output: true
console.log(StringMethods.isLower(str2)); // Output: false

• isUpper(str)

Checks if str contains only uppercase letters (A-Z).

Usage:

const StringMethods = require("stringmethods");

const str1 = "HELLO";
const str2 = "hello";
console.log(StringMethods.isUpper(str1)); // Output: true
console.log(StringMethods.isUpper(str2)); // Output: false

• isSpace(str)

Checks if str contains only whitespace characters.

Usage:

const StringMethods = require("stringmethods");

const str1 = "   ";
const str2 = "hello";
console.log(StringMethods.isSpace(str1)); // Output: true
console.log(StringMethods.isSpace(str2)); // Output: false

• capitalize(str)

Capitalizes the first letter of str and converts the rest to lowercase.

Usage:

const StringMethods = require("stringmethods");

const str = "hello world";
const capitalizedStr = StringMethods.capitalize(str);
console.log(capitalizedStr); // Output: Hello world

• title(str)

Capitalizes the first letter of each word in str.

Usage:

const StringMethods = require("stringmethods");

const str = "hello world";
const titleStr = StringMethods.title(str);
console.log(titleStr); // Output: Hello World

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