From: sawadatsuyoshi@...
Date: 2015-12-09T12:34:05+00:00
Subject: [ruby-core:71995] [Ruby trunk - Feature #11781] Would it be possible to alias .prepend() towards .unshift() for class Array by default?

Issue #11781 has been updated by Tsuyoshi Sawada.


`String#prepend` and `String#concat` are a pair that work similarly (with just the difference on where the new substring is inserted). And since there is already `Array#concat`, introducing `Array#prepend` would suggest that they should work similarly. However, while `Array#concat` takes an array and uses that as sub-array of the original array, the proposed `Array#prepend` takes an element and uses that as an element of the original array. This is higly confusing. I don't think the proposal is good.

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Feature #11781: Would it be possible to alias .prepend() towards .unshift() for class Array by default?
https://bugs.ruby-lang.org/issues/11781#change-55406

* Author: Robert A. Heiler
* Status: Open
* Priority: Normal
* Assignee: 
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Hello.

For Strings we can do:

    abc = 'world!'
    abc[0,0] = 'Hello '
    abc # => "Hello world!"

For Arrays we can do:

    abc = ['world!']
    abc[0,0] = 'Hello '
    abc # => ["Hello ", "world!"]

This is nice.

For Strings we can also use .prepend() to add to the beginning.

For Arrays, we have to use .unshift().

I have a hard time remembering .unshift though, .prepend() seems
to be easier for me to remember.

I'd like to use both .prepend for Strings and Arrays; right now
I have to use different names. I could alias prepend to unshift
for class Array, but then I'd have to carry these modifications
into my projects, which is not so good - I would prefer to just
stick to what MRI is doing.

Could we have the alias .prepend() for class Array, meaning 
.unshift() too? That way I could use .prepend() for both Arrays
and Strings.

Thanks for reading!



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