Ruby | Enumerable first() function
The first() of enumerable is an inbuilt method in Ruby returns the first N elements or the first element of the enumerable. If there is no first element, it returns nil. If there are less than N elements, then it returns all the elements.
Syntax: enu.first(N)
Parameters: The function takes N which signifies the first N elements which is to be returned. If N is not given, then it assumes N = 1.
Return Value: It returns the first or first N elements.
Example 1:
# Ruby program for first method in Enumerable # Initialize enu = ( 1 .. 10 ) # Prints enu.first( 6 ) |
Output:
[1, 2, 3, 4, 5, 6]
Example 2:
# Ruby program for first method in Enumerable # Initialize enu = [ 1 , 7 , 10 , 11 ] # Prints enu.first |
Output:
1
Example 3:
# Ruby program for first method in Enumerable # Initialize enu = [1, 7, 10, 11] # Prints enu.first(10) |
Output:
[1, 7, 10, 11]
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