Ruby Remove First Element From Array Top 4 Favorites

To remove the first element from an array in Ruby, you can use the shift method. Here’s an example:

ruby
arr = [1, 2, 3, 4, 5]
arr.shift
# => 1
puts arr.inspect
# => [2, 3, 4, 5]

In this example, the shift method is called on the arr array, which removes the first element of the array and returns it (1). The remaining elements in the array are [2, 3, 4, 5]. The inspect method is then called on the modified arr array to print it to the console for verification.

In Ruby on Rails, you can remove an element from an array by its index using the delete_at method. The delete_at method takes the index of the element you want to remove as an argument.

Here’s an example:

ruby
# create an array of fruits
fruits = ["apple", "banana", "orange", "pear"]

# remove the second element (banana)
fruits.delete_at(1)

# the array now contains ["apple", "orange", "pear"]

In this example, we create an array of fruits, and then use the delete_at method to remove the second element (which has an index of 1) from the array. The resulting array contains only the remaining elements: “apple”, “orange”, and “pear”.

To remove the last element from an array in Ruby, you can use the pop method. Here’s an example:

ruby
arr = [1, 2, 3, 4, 5]
arr.pop
# => 5
puts arr.inspect
# => [1, 2, 3, 4]

The pop method removes the last element of the array and returns it. In the example above, it removes 5 from the array and returns it. After that, the array only contains elements 1, 2, 3, and 4.