Re: Using regular expressions when reading a file

[Alexander Zhirov via Digitalmars-d-learn]

On Thursday, 5 May 2022 at 19:19:26 UTC, Ali Çehreli wrote:

Couldn't help myself from improving. :) The following regex works in my Linux console. No issues with '\n'. (?) It also allows for leading and trailing spaces:

import std.regex;
import std.stdio;
import std.algorithm;
import std.array;
import std.typecons;
import std.functional;

void main() {
  auto p_property = regex(r"^ *(\w+) *= *(\w+) *$");
  const properties = File("settings.conf")
                     .byLineCopy
                     .map!(line => matchFirst(line, p_property))

.filter!(not!empty) // OR: .filter!(m => !m.empty)

                     .map!(m => tuple(m[1], m[2]))
                     .assocArray;

  writeln(properties);
}

It will need to be sorted out with a fresh head. 😀 Thanks!