How do I remove the last character of a string in Swift 4? I used to use substring
in earlier versions of Swift, but the substring
method is deprecated.
Here's the code I have.
temp = temp.substring(to: temp.index(before: temp.endIndex))
dropLast()
is your safest bet, because it handles nils and empty strings without crashing (answer by OverD), but if you want to return the character you removed, use removeLast()
:
var str = "String"
let removedCharacter = str.removeLast() //str becomes "Strin"
//and removedCharacter will be "g"
A different function, removeLast(_:)
changes the count of the characters that should be removed:
var str = "String"
str.removeLast(3) //Str
The difference between the two is that removeLast()
returns the character that was removed, while removeLast(_:)
does not have a return value:
var str = "String"
print(str.removeLast()) //prints out "g"
You can use dropLast()
You can find more information on Apple documentation
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