Ruby | Array class join() function

join() is an Array class method which returns the string which is created by converting each element of the array to a string, separated by the given separator.

Syntax: Array.join()
Parameter: Array 
separator
Return: join value of the array elements

Example #1:

Ruby

# Ruby code for join() method

# declaring array
a = [18, 22, 33, nil, 5, 6]

# declaring array
b = [1, 4, 1, 1, 88, 9]

# declaring array
c = [18, 22, nil, nil, 50, 6]

# join
puts "join : #{a.join("4")}\n\n"

# join
puts "join : #{b.join('-')}\n\n"

# join
puts "join : #{c.join("*")}\n\n"

Output :

join : 1842243344546

join : 1-4-1-1-88-9

join : 18*22***50*6

Example #2:

Ruby

# Ruby code for join() method

# declaring array
a = ["abc", "nil", "dog"]

# declaring array
b = ["cow", nil, "dog"]

# declaring array
c = ["cat", nil, nil]

# join
puts "join : #{a.join("4")}\n\n"

# join
puts "join : #{b.join('-')}\n\n"

# join
puts "join : #{c.join("*")}\n\n"

Output : 

join : abc4nil4dog

join : cow--dog

join : cat**