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]