Swift version: 5.10
In Swift we normally loop over arrays like this:
let numbers = [1, 2, 3, 4, 5]
for number in numbers {
print(number)
}
However, Swift provides us an alternative: a dedicated array method called forEach()
, that loops over each item in the array and does something with it. For example, the above loop would be written like this:
numbers.forEach {
print($0)
}
The difference is that forEach()
can’t skip over any items – you can’t exit the loop part way, without processing the rest of the items. This helps people reading your code to figure out your intent: you want to act on all items, and won’t stop in the middle.
SPONSORED Transform your career with the iOS Lead Essentials. Unlock over 40 hours of expert training, mentorship, and community support to secure your place among the best devs. Click for early access to this limited offer and a FREE crash course.
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 8.0 – learn more in my book Pro Swift
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
Link copied to your pasteboard.