What is the set.popFirst() method in Swift?
Overview
We use the popFirst() method in Swift to remove and return the first element of a set. It is important to remember that a set in Swift is unordered, so the first element may not be the first element on the set as we see it.
Syntax
set.popFirst()
Syntax for the "popFirst()" method
Parameter value
This method does not take any parameter values.
Return value
This method returns the first element of the set that was removed.
Code
// create some setsvar names: Set = ["Alicia", "Bethany", "Chris", "Diana", "Eric"]var workers: Set = ["Alicia", "Bethany", "Diana"]var numbers: Set = [1, 2, 3, 4, 5, 7, 8, 9, 10]// pop and return first elementprint(names.popFirst()!)print(workers.popFirst()!)print(numbers.popFirst()!)
Explanation
- Lines 2–4: We create some set instances and initialize them with values.
- Lines 7–9: We remove the first element of the set using the
popFirst()method. Then, we return the popped or removed element.
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