Ruby | Array class join() function Last Updated : 31 May, 2021 Summarize Comments Improve Suggest changes Share Like Article Like Report 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 separatorReturn: 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** Comment More infoAdvertise with us Next Article Ruby | Array class join() function M mayank5326 Follow Improve Article Tags : Ruby Ruby-Methods Ruby Array-class Similar Reads Ruby | Array class index() function index() is an Array class method which returns the index of the first object in the array. Syntax: Array.index() Parameter: Array obj - object to search for Return: Index value of the first array Example #1 : Ruby # Ruby code for index() method # declaring array a = [18, 22, 33, nil, 5, 6] # declari 1 min read Ruby | Array class insert() function insert() is a Array class method which returns the array by inserting a given element at the specified index value. Syntax: Array.insert() Parameter: Array index element Return: insert elements the specific index value Example #1 : Ruby # Ruby code for insert() method # declaring array a = [18, 22, 2 min read Ruby | Array class inspect() function Inspect() is an Array class method which returns the all array elements. Syntax: Array.inspect() Parameter: Array Return: all array elements Example #1 : Ruby # Ruby code for inspect() method # declaring array a = [18, 22, 33, nil, 5, 6] # declaring array b = [1, 4, 1, 1, 88, 9] # declaring array c 1 min read Ruby | Array class hash() function hash() is an Array class method which returns the hash code of the array elements Syntax: Array.hash() Parameter: Array Return: hash code of the array elements Example #1 : Ruby # Ruby code for hash() method # declaring array a = [18, 22, 33, nil, 5, 6] # declaring array b = [1, 4, 1, 1, 88, 9] # de 1 min read Ruby | Array class last() function last() is a Array class method which returns the last element of the array or the last 'n' elements from the array. The first form returns nil, If the array is empty . Syntax: Array.last() Parameter: Array n - no. of elements Return: last element of the array or the last 'n' elements from the array 1 min read Like