On Thursday, 5 December 2019 at 11:28:51 UTC, Marcone wrote:
Simple example:
writeln("Hi\nHow are
you?\nGood".splitLines()[0][0..?lastIndexOf(r"\")]);
How to refer to this string in lastIndexOf() without create a
variable?
Thank you.
.splitLines[0] already just produces "Hi", containing no "\", so
this example is a bit broken.
writeln("#", "Hi\nHow are you?\nGood".splitLines()[0], "#"); //
#Hi#
You could write a function to work around having to declare a
variable:
string upto(string input, string delim)
{
return input[0 .. input.countUntil(delim)];
}
void main()
{
writeln(upto("Up to colon: skip this", ":")); // Up to colon
writeln("Up to colon: skip this".upto(":")); // Up to colon
}
You can use a function literal or lambda, but it isn't pretty:
writeln((string s){return s[0..s.countUntil(":")];}("Up to
colon: skip this")); // Up to colon
writeln((s => s[0..s.countUntil(":")])("Up to colon: skip
this")); // Up to colon
Bastiaan.
