Ruby's Hash is a Swiss-Army Knife
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A Hash is a built-in data structure in Ruby that maps values to keys and has a constant-time O(1) lookup. This article shows the capabilities of this simple, but equally powerful tool. We’ll start with the basics but also cover some obscure but equally useful features of hash.
  • 𝕽𝖚𝖆𝖎𝖉𝖍𝖗𝖎𝖌𝖍
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    1 year ago

    Hash is very handy, except that it’s extension mechanism is double-and-copy. That means that worth large data sets you can find a program that otherwise performs acceptably suddenly halting your entire machine.