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Ruby | Enumerable collect_concat() function

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The collect_concat() of enumerable is an inbuilt method in Ruby returns a new array with the concatenated results of running block once for every element in enum. In case no block is given, an enumerator is returned instead.
Syntax: block.collect_concat { |obj| block } Parameters: The function takes the block according to which the every block is to be returned. If no block is given, an enumerator is returned. Return Value: It returns a new array.
Example 1:
# Ruby program for collect_concat method in Enumerable
  
# Initialize
enu = [12, 18]
  
# returns enumerator
res = enu.collect_concat { |el| [2*el, 3*el] }

                    
Output:
[24, 36, 36, 54]
Example 2:
# Ruby program for collect_concat method in Enumerable
  
# Initialize
enu = [[17, 21], [19, 100]]
  
# returns enumerator
res = enu.collect_concat { |el| el + [1000] }

                    
Output:
[17, 21, 1000, 19, 100, 1000]

Last Updated : 05 Dec, 2019
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