Swift Tips

The easiest way to sort an Array in Swift is to use the sort method. This method is available for all Arrays that have Equatable elements and it sorts your array in place: var words = [“hello”, “world”, “this”, “is”, “a”, “list”, “of”, “strings”] words.sort() // words is now [“a”, Read more…

You can use Array’s insert(_:at:) method to insert a new element at the start, or any other arbitrary position of an Array: var array = [“world”] array.insert(“hello”, at: 0) // array is now [“hello”, “world”] Make sure that the position that you pass to the at: argument isn’t larger than Read more…

Dates in Swift can be compared to each other. This allows you to check whether one date comes before or after another date: if dateOne > dateTwo { print(“dateOne comes after dateTwo”) } else if dateOne < dateTwo { print(“dateOne comes before dateTwo”) } else if dateOne == dateTwo { Read more…

Arrays in Swift are powerful and they come with many built-in capabilities. One of these capabilities is the ability to remove objects. If you want to remove a single, specific object from an Array and you know its index, you can use remove(at:) to delete that object: var array = Read more…

When you have an Array of elements, and you want to drop all elements that don’t match specific criteria from the Array, you’re looking for Array’s filter(isIncluded:) method. Let’s say you have an array of words and you only want to keep the words that are longer than three characters: Read more…

You can reverse an Array, and any other Collection in Swift using the reverse method. For example var input = [1, 2, 3] print(input) // [1, 2, 3] input.reverse() print(input) // [3, 2, 1] The code above takes an array (input) and reverses it in-place using the reverse() method. This Read more…