Hello, I wanted to remove the lastchar in a string and figured that you can do that wit

str = str[0..$-2];

but why is

str = str[0..$] and str=str[0..$-1]

the same ?

On Wednesday, 19 February 2020 at 07:04:48 UTC, Namal wrote:
> Hello, I wanted to remove the lastchar in a string and figured that you can do that wit
>
> str = str[0..$-2];
>
> but why is
>
> str = str[0..$] and str=str[0..$-1]
>
> the same ?

Why do you think that they are the same?

$ rdmd --eval 'auto str = "hello"; writeln(str = str[0..$]); writeln(str = str[0..$-1])'
hello
hell

oooh... I used

str = std.readln();

to get my string and there must have been some other sign, line break or whitespace or something at the end  :(

Now I understand it, thx

On Wednesday, 19 February 2020 at 07:49:36 UTC, Namal wrote:
> oooh... I used
>
> str = std.readln();
>
> to get my string and there must have been some other sign, line break or whitespace or something at the end  :(
>
> Now I understand it, thx

That makes sense. readln includes the newline:

$ echo hello | rdmd --eval 'readln.map!(std.uni.isWhite).writeln'
[false, false, false, false, false, true]

You can use std.string.chomp to drop it:

$ echo hello | rdmd --eval 'readln.chomp.map!(std.uni.isWhite).writeln'
[false, false, false, false, false]