Re: Extract sub string from a string

[Vino via Digitalmars-d-learn]

On Monday, 9 November 2020 at 18:55:44 UTC, Ali Çehreli wrote:

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

Hi Both,

  Thank you very much, your solution resolved our issue.