Ruby Map Hash. Ruby's Hash is a SwissArmy Knife It means that Ruby has support for higher-order functions, and functional programming The definition of a Hash straight from the docs themselves: A Hash is a dictionary-like collection(If you are a Java person, think maps) of unique keys and their values.
Ruby Data Structures Hashes A closer look at Ruby’s Built in Hash Methods YouTube from www.youtube.com
Given an array of strings, you could go over every string & make every character UPPERCASE. If neither an argument nor a block is given, initializes both the default value and the default proc to nil:
Ruby Data Structures Hashes A closer look at Ruby’s Built in Hash Methods YouTube
Notice that the key-value pairs are separated by commas Ruby convert an Array to Hash values with specific keys Map is a Ruby method that you can use with Arrays, Hashes & Ranges
Exploring Ruby Hashes A Basic Guide. range = (1..5) doubled_values = range.map { |num| num * 2 } puts doubled_values # Output: [2, 4, 6, 8, 10] Chaining Ruby Map with Other Methods A hash with three key/value pairs looks like this: { a: 1, b: 2, c: 3 } Where a is a key, and 1 is the corresponding value for that key
Working with Data in Ruby Arrays, Hashes, and Beyond. How to change array of arrays into hashmap? Hot Network Questions With what to replace uBlock Origin now after Google Chrome nerfed it? When the block is omitted, collect or map uses this implied block: {|item| item}, which means when applied on an hash without a block, collect/map returns an array containing a set of two-item arrays, one for each key/value pair in the hash.