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Re:Ruby basics (1 viewing) (1) Guest
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TOPIC: Re:Ruby basics
#4493
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Iterators are nothing but methods supported by collections.

Objects that store a group of data members are called collections. In Ruby, arrays and hashes can be termed collections.
 
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#4494
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Iterators return all the elements of a collection, one after the other.

We will be discussing two iterators here, each and collect.
 
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#4495
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Ruby each Iterator:

The each iterator returns all the elements of an array or a hash
 
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#4496
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
The each iterator returns all the elements of an array or a hash.

Syntax:

collection.each do |variable|
code
end


Executes code for each element in collection. Here collection could be an array or a ruby hash.
 
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#4497
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
We always associate the each iterator with a block. It returns each value of the array, one by one, to the block.

The value is stored in the variable i and then displayed on the screen.
 
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#4498
ShriNi (User)
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Re:Ruby basics 3 Years, 10 Months ago Karma: 0  
Ruby collect Iterator:

The collect iterator returns all the elements of a collection.

Syntax:

collection = collection.collect
 
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