# Hash name increment on iteration? **URL:** \ **Category:** Ruby\ **Created:** [April 8, 2010, 3:30am UTC](https://www.ruby-forum.com/t/hash-name-increment-on-iteration/186508 "2010-04-08T03:30:54Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![shaz](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/ba9def/32.png) [@shaz](https://www.ruby-forum.com/u/shaz)\ **Post date:** [April 8, 2010, 3:30am UTC](https://www.ruby-forum.com/t/hash-name-increment-on-iteration/186508/1 "2010-04-08T03:30:54Z")
Is it possible to add to the name of a hash while running through an iteration? What I’m trying to achieve: SomeArray.each do |i, name, content| info[i+1] = { “name” =\> name, “content” =\> content } end So that I can call, for example info[1] [name] or info[5][content]… ---
**Author:** ![shaz](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/ba9def/32.png) [@shaz](https://www.ruby-forum.com/u/shaz)\ **Post date:** [April 8, 2010, 9:15am UTC](https://www.ruby-forum.com/t/hash-name-increment-on-iteration/186508/2 "2010-04-08T09:15:41Z")
On 08.04.2010 03:27, Shaz wrote: > Is it possible to add to the name of a hash while running through an > iteration? What I’m trying to achieve: > > SomeArray.each do |i, name, content| > info[i+1] = { “name” =\> name, “content” =\> content } > end > > So that I can call, for example info[1] [name] or info[5][content]… Make info an Array and just use info \<\< { :name =\> name, :content =\> content } Kind regards robert ---
**Author:** ![shaz](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/ba9def/32.png) [@shaz](https://www.ruby-forum.com/u/shaz)\ **Post date:** [April 8, 2010, 9:44am UTC](https://www.ruby-forum.com/t/hash-name-increment-on-iteration/186508/3 "2010-04-08T09:44:08Z")
Is this what you want? SomeArray.each\_with\_index do |(name,content),i| … end ---
**Author:** ![shaz](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/ba9def/32.png) [@shaz](https://www.ruby-forum.com/u/shaz)\ **Post date:** [April 11, 2010, 9:30am UTC](https://www.ruby-forum.com/t/hash-name-increment-on-iteration/186508/4 "2010-04-11T09:30:48Z")
Shaz wrote: > Each with index worked for me - didn’t realize each variable in the > array has an index that can be called. Not exactly. The ‘each\_with\_index’ method just yields the array index to the block being called. Inside it will be implemented something like this: module Enumerable def each\_with\_index i = 0 each do |elem| yield elem, i i += 1 end end end But you could consider it like this: class Array def each\_with\_index size.times do |i| yield self[i], i end end end ---
**Author:** ![shaz](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/ba9def/32.png) [@shaz](https://www.ruby-forum.com/u/shaz)\ **Post date:** [April 11, 2010, 2:40am UTC](https://www.ruby-forum.com/t/hash-name-increment-on-iteration/186508/5 "2010-04-11T02:40:58Z")
On 8 Apr, 08:44, Brian C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Is this what you want? > > SomeArray.each\_with\_index do |(name,content),i| > … > end > > – > Posted viahttp://www.ruby-forum.com/. Each with index worked for me - didn’t realize each variable in the array has an index that can be called. Thanks! ---
**Author:** ![shaz](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/ba9def/32.png) [@shaz](https://www.ruby-forum.com/u/shaz)\ **Post date:** [April 11, 2010, 10:12pm UTC](https://www.ruby-forum.com/t/hash-name-increment-on-iteration/186508/6 "2010-04-11T22:12:11Z")
On Sun, Apr 11, 2010 at 5:32 PM, Li Chen [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > ``` > > end > > > > ``` > > > > end > > 1. which one is the reciever for “each”? > 2. which one is the reciever for “size”? When there’s no explicit receiver, the method call happens on the object that is “self” at that point. Jesus. ---
**Author:** ![shaz](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/ba9def/32.png) [@shaz](https://www.ruby-forum.com/u/shaz)\ **Post date:** [April 12, 2010, 12:34am UTC](https://www.ruby-forum.com/t/hash-name-increment-on-iteration/186508/7 "2010-04-12T00:34:20Z")
Jesús Gabriel y Galán wrote: > On Sun, Apr 11, 2010 at 5:32 PM, Li Chen [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > > > > � � end > > > � end > > > > 1. which one is the reciever for “each”? > > 2. which one is the reciever for “size”? > > When there’s no explicit receiver, the method call happens on the > object that is “self” at that point. > > Jesus. Hi Gabriel, Where can I find more info about method call on implicit receiver? Li ---
**Author:** ![shaz](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/ba9def/32.png) [@shaz](https://www.ruby-forum.com/u/shaz)\ **Post date:** [April 12, 2010, 5:21am UTC](https://www.ruby-forum.com/t/hash-name-increment-on-iteration/186508/8 "2010-04-12T05:21:47Z")
On 4/11/10, Li Chen [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Where can I find more info about method call on implicit receiver? Seems like we’ve had a number of newbies who’ve been perplexed about this recently. Maybe this should be in the faq. Isn’t there a faq somewhere? ---
**Author:** ![shaz](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/ba9def/32.png) [@shaz](https://www.ruby-forum.com/u/shaz)\ **Post date:** [April 11, 2010, 5:32pm UTC](https://www.ruby-forum.com/t/hash-name-increment-on-iteration/186508/9 "2010-04-11T17:32:38Z")
Brian C. wrote: > Inside it will be implemented something like this: > > module Enumerable > def each\_with\_index > i = 0 > each do |elem| > yield elem, i > i += 1 > end > end > end > > But you could consider it like this: > > class Array > def each\_with\_index > size.times do |i| > yield self[i], i > end > end > end Hi Brian, Just some follow-up questions for these codes: I recall the the method call in Ruby follow this format: “receiver.method” So 1. which one is the reciever for “each”? 2. which one is the reciever for “size”? Thanks, Li