How to get the last element of an array in Ruby?
Example:
a = [1, 3, 4, 5]
b = [2, 3, 1, 5, 6]
How do I get the last value 5 in array a or last value 6 in array b without using a[3] and b[4]?
Use -1 index (negative indices count backward from the end of the array):
a[-1] # => 5
b[-1] # => 6
or Array#last method:
a.last # => 5
b.last # => 6
One other way, using the splat operator:
*a, last = [1, 3, 4, 5]
STDOUT:
a: [1, 3, 4]
last: 5