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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
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{ a: 'a', b: 'b' }.map { |k, str| [k, "%#{str}%"] }.to_h
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Convert an Array of Hashes to a Hash
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# I have an array of hashes
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array = [ {id: 1, name: "test"} ]
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​
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# I want to turn it to a hash, where the key is `id`
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array.map { |h| [h[:id], h] }.to_h
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#=> { 1 => {:id => 1, :name => "test"} }
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Lazy Enumerators

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Using .map on a Hash

Convert an Array of Hashes to a Hash