From: matz@...
Date: 2016-08-09T07:06:11+00:00
Subject: [ruby-core:76779] [Ruby trunk Feature#11818] `Hash#compact`

Issue #11818 has been updated by Yukihiro Matsumoto.


Accepted.

Matz.


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Feature #11818: `Hash#compact`
https://bugs.ruby-lang.org/issues/11818#change-60003

* Author: Tsuyoshi Sawada
* Status: Assigned
* Priority: Normal
* Assignee: Yukihiro Matsumoto
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I request `Hash#compact` and `Hash#compact!` that remove the key-value pairs whose value is `nil`, as follows:

    h1 = {a:, 1, b: nil, c: 2}
    h1.compact # => {a: 1, c: 2}
    h1 # => {a: 1, b: nil, c: 2}

    h2 = {a:, 1, b: nil, c: 2}
    h2.compact! # => {a: 1, c: 2}
    h2 # => {a: 1, c: 2}

    h3 = {a:, 1, c: 2}
    h3.compact! # => nil
    h3 # => {a: 1, c: 2}

I believe people have frequent need to do this.



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