What is Ruby's method with a bang (!)

Understanding Rub’s bang/exclamation mark

Originally Published in https://asyncq.com/

Introduction

• I have been doing Java development for 6+ years of my software developer career.
• But recently I started learning Ruby and Ruby on Rails.
• As a Java developer, there are lots of similarities and surprises when I jump on the ruby boat, one of them seeing the exclamation operator.
• In this blog, we will understand what is the meaning of this exclamation mark in Ruby

Exclamation Mark

• Methods with an exclamation mark are called bang methods in ruby.
• The use of exclamation marks mainly tells the programmer that these methods are dangerous and used with caution.
• Dangerous in the sense that this method will modify the input. Let's see the example.

Using Array Example

#1: We have a numbers array that we would like to reverse.

numbers = [1,2,3,4,5]

numbers.reverse
puts numbers.join(",")

• In the above example, the reverse operation didn’t modify the actual numbers array because when we print the numbers array…