From: Lazaridis Ilias <ilias@...>
Date: 2011-06-06T16:32:49+09:00
Subject: [ruby-core:36781] [Ruby 1.9 - Feature #4830] Provide Default Variables for Array#each and other iterators


Issue #4830 has been updated by Lazaridis Ilias.


[please, if possible, delete the non-relevant quoted message in your reply. You can still do this via http://redmine.ruby-lang.org/issues/4830]

Rodrigo Rosenfeld Rosas wrote:
> Sorry, forgot to say that for hashes this becomes:
>
>  [key_name: 'value', another_key: 'another_value'].each{ println 
>  "${it.key}: ${it.value}"}
[...]
>  Em 05-06-2011 15:56, Rodrigo Rosenfeld Rosas escreveu:
>  > I would just like to point it out that in Groovy, one can write either:
>  >
>  > [1, 2].each{ println it }
[...]

"it" is not speakable. 

"with each it"
"for each it"

where "item" or "value" is speakable

"with each item" or "with each value"
"for each item" or "for each value"

----------------------------------------
Feature #4830: Provide Default Variables for Array#each and other iterators
http://redmine.ruby-lang.org/issues/4830

Author: Lazaridis Ilias
Status: Assigned
Priority: Low
Assignee: Yukihiro Matsumoto
Category: core
Target version: 


for arrays: use "item" by default
for hashes: use "key" and "value" by default

names = ["Jane", "Michele", "Isabella"]
names.each { |name| print name, "\n" } 
names.each { print item, "\n" } 

contact = {name:"Jane", phone:"1234567"}
contact.each { |key, value| print key, ": ", value, "\n"}
contact.each { print key, ": ", value, "\n"}

-

The benefits are:

* more compact code (without loosing clarity of the code).
* no repetitions ("names, name, name") in a one-liner with {} block

This extension does not break any existent behaviour.


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