Extraneous argument label 'with:' in call

Question

In this code

text = prospectiveText.substring( with: Range<String.Index>(prospectiveText.startIndex ..< prospectiveText.characters.index(prospectiveText.startIndex, offsetBy: maxLength)) )

i get the error Extraneous argument label 'with:' in call after I updated xcode to 10.01

How to fix the bug?

@Paulw11 after removing it, I get `Cannot invoke initializer for type 'Range' with an argument list of type '(Range)'` this error — sharon, Oct 08 '18 at 07:57

Martin R · Accepted Answer · 2018-10-08T08:22:30.410

As in Cannot invoke initializer for type 'Range<String.Index>' with an argument list of type '(Range<String.Index>)', the compiler error can be fixed by removing the Range<String.Index>(...) conversion. This will still cause warnings

'characters' is deprecated: Please use String or Substring directly
substring(with:)' is deprecated: Please use String slicing subscript.

which can be fixed with

text = prospectiveText[..<prospectiveText.index(prospectiveText.startIndex, offsetBy: maxLength)]

However, you can achieve the same result far simpler with

text = String(prospectiveText.prefix(maxLength))

Extraneous argument label 'with:' in call

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