How can I remove the last character of a String in Swift 4? [duplicate]
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) //StrThe 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"
A literal Swift 4 conversion of your code is
temp = String(temp[..<temp.index(before: temp.endIndex)])foo.substring(from: index)becomesfoo[index...]foo.substring(to: index)becomesfoo[..<index]and in particular cases a new
Stringmust be created from theSubstringresult.
but the solution in the4kmen's answer is much better.