insert a string into another string at a specific index in ruby

To insert a string into another string at a specific index in Ruby, you can make use of the insert method. The syntax for inserting a string is as follows:

main.rb
string_to_insert = "new string"
original_string = "original string"
index = 7

original_string.insert(index, string_to_insert)
127 chars
6 lines

In the code above, string_to_insert is the new string that you want to insert into original_string, index is the index at which you want to insert the new string, and original_string.insert(index, string_to_insert) inserts the new string at the specified index and returns the modified string.

For example:

main.rb
string_to_insert = "world "
original_string = "Hello, Ruby!"
index = 6

original_string.insert(index, string_to_insert) # "Hello, world Ruby!"
143 chars
6 lines

In this example, the string "world " is inserted at index 6, resulting in the modified string "Hello, world Ruby!".