Extract sub string from a string

[Ali Çehreli]

On 11/9/20 9:53 AM, k2aj wrote:

 > string text = "welcome2worldinfo";
 > string hg = toUpper(text[0..7] ~ "-" ~ text[7..8] ~ "-" ~ text[8..13]);

If those concatenations with the ~ operators prove to be costly at 
runtime, the following range expression may be faster because it does 
not allocate any memory:

import std.string;
import std.range;
import std.algorithm;
import std.stdio;

void main() {

   string text = "welcome2worldinfo";
   auto hg = chain(text[0..7], only('-'), text[7..8], only('-'), 
text[8..13]).map!toUpper;
   writeln(hg);
}

Ali