Ruby | Enumerable grep() function
The grep() of enumerable is an inbuilt method in Ruby returns an array of elements which contain every (element == pattern), of all the elements in the pattern. If the optional block is not given, then it returns an array containing the elements in that pattern.
Syntax: enu.grep(pattern) { |obj| block }
Parameters: The function takes a pattern and an optional block.
Return Value: It returns either an array of boolean values or an array containing the elements that are contained in the enumerable.
Example 1:
# Ruby program for grep method in Enumerable # Initialize enu = ( 1 .. 10 ) # Prints enu.grep ( 3 .. 5 ) |
Output:
[3, 4, 5]
Example 2:
# Ruby program for grep method in Enumerable # Initialize enu = ( 1 .. 10 ) # Prints enu.grep ( 3 .. 5 ) { |obj| obj % 2 == 1 } |
Output:
[true, false, true]
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