Ruby | Array class insert() function

Ruby | Array class index() function

Last Updated : 08 Jan, 2020

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]

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

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

# index
puts "index : #{a.index(5)}\n\n"

# index
puts "index : #{b.index(4)}\n\n"

# index
puts "index : #{c.index(nil)}\n\n"

Output :

index : 4

index : 1

index : 2

Example #2 :

Ruby

# Ruby code for index() method

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

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

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

# index
puts "index : #{a.index("abc")}\n\n"

# index
puts "index : #{b.index(nil)}\n\n"

# index
puts "index : #{c.index(nil)}\n\n"

Output :

index : 0

index : 1

index : 1

Ruby | Array class insert() function

M

mayank5326

Improve

Article Tags :

Similar Reads

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,

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.Â Syntax: Array.join()Parameter: ArrayÂ separatorReturn: join value of the array elements Example #1:Â Ruby # Ruby code for join() method # d

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

Ruby | Array rindex() function

Array#rindex() : rindex() is a Array class method which returns the index of the last object in the array. Syntax: Array.rindex() Parameter: Array Return: the index of the last object in the array. if not present then nil Example #1 : Ruby # Ruby code for rindex() method # declaring array a = [18, 2

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

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

Ruby | Array class to_s() function

to_s() is an Array class method which returns the string representation of the array elements. Syntax: Array.to_s() Parameter: Array Return: string representation of the array elements. Example #1: Ruby # Ruby code for to_s() method # declaring array a = [18, 22, 33, nil, 5, 6] # declaring array b =

Ruby | Array assoc() function

The assoc() function in Ruby is used to search through an array of arrays whose first element is compared with the index of the function and return the contained array if match found otherwise return either nil or vacant. Syntax: Array.assoc(Object) Here Array is the array of arrays. Parameters: Obj

Ruby | Array class first() function

first() is a Array class method which returns the first element of the array or the first 'n' elements from the array. Syntax: Array.first() Parameter: Array n - no. of elements Return: first element of the array or the first 'n' elements from the array Example #1 : Ruby # Ruby code for first() meth

Ruby | Array one?() function

Array#one?() : one?() is a Array class method which checks whether the array is having only one array element. Syntax: Array.one?() Parameter: Array Return: true - if array has only one element otherwise return false. Example #1 :Â Ruby # Ruby code for one?() method # declaring array a = [18, 22, 33