Trusted answers to developer questions
Trusted Answers to Developer Questions

Related Tags

ruby
communitycreator

What is the hash.shift method in Ruby?

okwudili onyejiaku

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

Answers Code

Overview

The shift method of a hash is used to return the first hash entry of a hash.

Syntax

hash.shift

Parameters

This method does not take any parameters.

Return value

This method returns a 2-element array that contains the removed key and value.

Example

# create hashes
h1 = {one: 1, two: 2, three: 3}
h2 = {name: "okwudili", stack: "ruby"}
h3 = {"foo": 0, "bar": 1}
h4 = {M:"Mango", A: "Apple", B: "Banana"}
# use the shift method
puts "#{h1.shift}"
puts "#{h2.shift}"
puts "#{h3.shift}"
puts "#{h4.shift}"
Getting the first hash entry in a 2-element array form in Ruby

Explanation

  • Lines 2 to 5: We create several hashes.
  • Lines 8 to 11: We print the results using the shift to return the first hash entry in a 2-element array containing the key and value

RELATED TAGS

ruby
communitycreator

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

Answers Code
Keep Exploring