i did not understand this when i was reading ruby docs: "::[]: returns a new array populated with given objects." in ruby

The '::[]' is a shorthand notation in Ruby for creating a new array and populating it with given objects. It is equivalent to calling the 'Array.[]' method.

Here's an example to illustrate its usage:

main.rb
array = Array[1, 2, 3, 4]
puts array.inspect
# Output: [1, 2, 3, 4]
68 chars
4 lines

In the above example, 'Array[1, 2, 3, 4]' or '::[1, 2, 3, 4]' creates a new array and populates it with the given objects, which are integers in this case. The resulting array is then assigned to the 'array' variable.

This shorthand notation can be useful when you want to quickly create an array with a predefined set of objects.

I hope this helps! Let me know if you have any further questions.