What is the removeFirst() method in Swift?
Overview
The removeFirst() method of an array in Swift removes and returns the first element of an array.
Syntax
arr.removeFirst()
Parameters
This method takes no parameters.
Return value
The removed element is returned.
Code example
// create arraysvar numbers = [1, 3, 10, 4]var techCoys = ["Google", "Amazon", "Netflix"]var letters = ["a", "b", "c", "d", "e"]var fruits = ["apple", "mango"]// remove first elementslet num = numbers.removeFirst()let tech = techCoys.removeFirst()let letter = letters.removeFirst()let fruit = fruits.removeFirst()// print resultsprint(num)print(tech)print(letter)print(fruit)// print arrays againprint("New Arrays: \n")print(numbers)print(techCoys)print(letters)print(fruits)
Explanation
- Lines 2-5: We create arrays.
- Lines 8-11: We use the
removeFirst()method to remove the first elements of the arrays that we’ve created. We then store the results in some variables. - Lines 14-17: We print the removed elements.
- Lines 20-24: Because elements have been removed from the arrays, we print the arrays and discover that they have been modified because of the
removeFirst()method.
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