From: 7stud -- <bbxx789_05ss@...>
Date: 2007-10-20T03:54:24+09:00
Subject: Re: Block iteration issues

Gromobij Swietlisty wrote:
> Hello,
> 
> I'm struggling with this stuff and can't find an answer so please
> advise.
> What I'm trying to achieve
> 
> @collection has 7 elements
> I want to:
> - cycle through all those elements
> - assign element["smth"] through element["smth3"] to @ data.set1_smth
> through @data.set1_smth3
> - the last iteration would be assigning element["smth"] to
> @data.set7_smth etc
> 
> I just don't seem to grasp how to change @data.set1_smth into
> @data.set2_smth etc. when iterating the block.
> 
> i = 1
> @collection.elements.each do |item|
>         @data.set1_smth = item.elements["smth"]   # obviously
> @data.set1_smth should be somehow different
>         @data.set1_smth2 = item.elements["smth2"]
>         @data.set1_smth3 = item.elements["smth3"]
>         i += 1
> end
> 
> Can anybody help?
> I tried @data.send("set" + i + "_smth") but that didn't seem to work.
> Thanks in advance.
> 
> Radek

- assign element["smth"] through element["smth3"] to @ data.set1_smth
through @data.set1_smth3


If you are naming variables like this:

val1 = 5
val2 = 7
val3 = -3

that tells you that you should be using an array instead:

arr = []
arr[0] = 5
arr[1] = 7
arr[2] = -3


>
> @collection.elements
>

------------------------------------------------------- Vector::elements
     Vector::elements(array, copy = true)
------------------------------------------------------------------------
     Creates a vector from an Array. The optional second argument
     specifies whether the array itself or a copy is used internally.


Why are you creating a Vector in order to step through the items of your 
array?

>
> Can anybody help?
>

collection = [1, 2, 3, 4, 5, 6, 7]
data = []

collection.each do |item|
  data << item
end

p data


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