Mastering Ruby String Methods: Practical Examples

Ruby String Methods Examples

Ruby offers a rich set of string methods that allow you to manipulate text efficiently. Below are some essential string methods along with practical examples.

1. upcase Method

The upcase method converts all lowercase letters in a string to uppercase.

string = "hello world"
upper_string = string.upcase
puts upper_string  # Output: HELLO WORLD

2. downcase Method

Conversely, the downcase method changes all uppercase letters to lowercase.

string = "HELLO WORLD"
down_string = string.downcase
puts down_string  # Output: hello world

3. strip Method

The strip method removes leading and trailing whitespace from a string.

string = "   Ruby Programming   "
trimmed_string = string.strip
puts trimmed_string  # Output: Ruby Programming

4. length Method

The length method returns the number of characters in a string.

string = "String Length"
length_of_string = string.length
puts length_of_string  # Output: 13

5. include? Method

This method checks if a substring exists within a string, returning true or false.

string = "Hello, Ruby!"
contains_ruby = string.include?("Ruby")
puts contains_ruby  # Output: true

6. gsub Method

The gsub method is used for global substitution of a pattern with a specified replacement.

string = "I love Ruby programming."
new_string = string.gsub("Ruby", "Python")
puts new_string  # Output: I love Python programming.

7. split Method

The split method divides a string into an array based on a specified delimiter.

string = "Apple, Banana, Cherry"
fruits = string.split(", ")
puts fruits.inspect  # Output: ["Apple", "Banana", "Cherry"]

8. reverse Method

The reverse method returns a new string with the characters in reverse order.

string = "Ruby"
reversed_string = string.reverse
puts reversed_string  # Output: ybuR

Conclusion

Understanding these Ruby string methods will enhance your ability to work with text data effectively. Use these examples as a reference in your coding journey!