> For the complete documentation index, see [llms.txt](https://wiki.omar.engineer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.omar.engineer/programming-languages/ruby/snippets.md).

# Snippets

A couple of snippets for things I have to do a lot but forget how every once in a while

## Using `.map` on a Hash

```ruby
{ a: 'a', b: 'b' }.map { |k, str| [k, "%#{str}%"] }.to_h
```

## Convert an Array of Hashes to a Hash

```ruby
# I have an array of hashes
array = [ {id: 1, name: "test"} ]

# I want to turn it to a hash, where the key is `id`
array.map { |h| [h[:id], h] }.to_h
#=> { 1 => {:id => 1, :name => "test"} }
```