Ruby insert array method

In ruby programming language, insert()method of array are used to insert elements in particular position in array. Syntax of this method as follows.

Syntax Array.insert(index,elements)
Parameter First is insert position, other is inserting elements
Return Returns reference of resultant array

This method can take two and more than two parameters. First parameter is indicate the position of inserting elements. And other parameters is indicates inserting object element into the array. When inserting more than one element that is separated by comma.

Ruby insert method example

This method are modifying actual (self) array by inserting new elements. In this section view few example which is describe the its working functionality.

# Example add single element

# Our array
record = [10,true,[1,2]]

# Before insert
print(" Before Record : ", record)

# Insert element 10 in second index position
record.insert(2,10)

# After insert
print("\n After Record  : ", record)
Ruby insert method example 1
  Before Record : [10, true, [1, 2]]
 After Record  : [10, true, 10, [1, 2]]

In above example adding single element which is belong to index position. Note that adding new element at index after that other element index will be changed.

Using of this method are possible to add multiple elements at given index. Lets seen an example.

# Example of add multiple element

# Our arrays
record = [5, 7, 10, 6]
data = [1,4,3]

# Before insert
print(" Before Record : ", record)

# Insert element (8,9,[2,5],data) in third index position
record.insert(3,8,9,[2,5],data)

# After insert
print("\n After Record  : ", record)
Ruby insert method example 2
 Before Record : [5, 7, 10, 6]
 After Record  : [5, 7, 10, 8, 9, [2, 5], [1, 4, 3], 6]

In case positioned are greater than array length. Then in this situation, it method are add nil value to previous position which is not exists in array. See this example.

# Our array
record = [1,2,3]

# Before insert
print(" Before Record : ", record)

# Insert element ([10,20]) in fifth index position
record.insert(5,[10,20])

# After insert
print("\n After Record  : ", record)
Ruby insert method example 3
 Before Record : [1, 2, 3]
 After Record  : [1, 2, 3, nil, nil, [10, 20]]


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