From: nicolas.rodriguez13@...
Date: 2016-09-14T21:40:25+00:00
Subject: [ruby-core:77279] [Ruby trunk Feature#12746] class Array: alias	.prepend to .unshift ?

Issue #12746 has been updated by Nicolas Rodriguez.


Also `.prepend` sounds more natural than `.unshift`. But it also implies `.append` which should be aliased to `.push`.

Example :

`[1, 2, 3,].append(4).append(5)`

----------------------------------------
Feature #12746: class Array: alias .prepend to .unshift  ?
https://bugs.ruby-lang.org/issues/12746#change-60509

* Author: Robert A. Heiler
* Status: Open
* Priority: Normal
* Assignee: 
----------------------------------------
This code works:

    array = %w( b c )  # => ["b", "c"]
    array.unshift "a"
    array              # => ["a", "b", "c"]

I would like for .prepend to also work on class Array.

Rationale:

I found myself to sometimes .prepend to a String object
in Ruby, which works very well.

Sometimes I do not want to care whether I have a String
or an Array, I just want to prepend stuff (add to the
beginning).

I can do so via .unshift, fair enough, and I also can
use [] such as:

    array[0,0] = 'a'

Which works on both class String and Array.

Since class Hash is sorted (kept in order) these days,
perhaps they can also use a .prepend variant, which
either works for prepending both a key-value pair,
or optionally, to make the value default to nil and
just provide a key (if the user does not need to 
specify a specific value) such as:

    hash.prepend :cat
    hash.prepend cat: :Tom

But primarily, I only ask for class Array since I 
have had use cases for class Array; I did not yet
have a similar use case for class Hash.

Feel free to close this if it is considered unwanted
for any reason!



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