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My beloved Ruby Cheat Sheet

Eric The Coder on December 14, 2020

Follow me!: Follow @EricTheCoder_ Here is my cheat sheet I created along my learning journey. If you have any recommendations (addition/subtract...

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Tom Mulkins • Feb 22 '22

Thanks for putting this out there.

I have one suggestion:

Consider making "dealing with Nil values" its own section. :)

Pascal Gautherot • Jul 18 '24 • Edited

# I have some fruits...
fruits = <<END_OF_FRUITS
Apple Orange Banana
Pineapple Strawberry Apple
Orange Apple Strawberry
END_OF_FRUITS
# "Apple Orange Banana\nPineapple Strawberry Apple\nOrange Apple Strawberry\n"

# I want to split with space and CR
fruits.split(/ |\n/)
# ["Apple", "Orange", "Banana", "Pineapple", "Strawberry", "Apple", "Orange", "Apple", "Strawberry"]

# I want to make a GROUP BY like a DB
fruits.split(/ |\n/).tally
# {"Apple"=>3, "Orange"=>2, "Banana"=>1, "Pineapple"=>1, "Strawberry"=>2}

# How many Apples can I eat this morning?
fruits.split(/ |\n/).tally["Apple"]
# 3

Lee • Dec 14 '20

This is great!

Norris Mei • Oct 4 '23

Thank you for this summary! I'm brushing up my Ruby skills and this cheat sheet jogged a lot of things for me.

For the exception handling part, I think you meant 1 / 0 for ZeroDivisionError. It's written as 0 / 1 in two lines and one comment, which is just 0 and shouldn't produce an error.