Pattern Matching Magic

pattern_matching_magic.rb

# Creating a complex hash, with nested keys 
my_complex_hash = {
  users: [
    {name: "Yukihiro Matsumoto", age: 57},
    {name: "Kabosu the Shiba Inu", age: 16},
    {name: "Thiago Massa", age: 33}
  ]
}

# What if we want to find the age of Matz?
my_complex_hash => {
 users: [*_, {name: "Yukihiro Matsumoto", age: matz_age}, *_]
}
matz_age # => 57

# 😱 WTF! What happened there? 

# The _ just means we want to ignore the output and not want to assign it to a variable.

# We are using the Find pattern. (experimental feature on Ruby 3.1)
# By specifying *_ in the beginning and end we can search through the data structure... 
# Similar to a Regexp! 🤯 So cool!

# Coming next we'll look into variable pinning in Pattern Matching 😊