General

Tabs are 2 spaces when writing Ruby
Data types are first-class citizens in Ruby, like in JavaScript
We can print on the screen with puts

Primitive Data Types

String interpolation in Ruby requires the use of double quotes.

"I am #{first_name}"

Symbols are often used as hash keys; Start them with a letter.
In number operations, combining an int and a float will return a float

Objects

Putting a question mark at the end of a method indicates a boolean return value:

"foobar".empty?

Arrays

Calling an array method with the bang operator at the end will allow that array to be mutated.
The shovel operator << can append items to the end of an array.
The to_a method converts a range into an array

Blocks

Blocks are closures with which are often used to perform operations on a list or range of values.

Methods

Ruby methods have an implicit return, meaning that they return the last statement that's evaluated is a return isn't explicitly declared.
Ruby supports multiple returns, like Golang