reading file byLine

[cym13 via Digitalmars-d-learn]

On Wednesday, 2 September 2015 at 13:46:54 UTC, Namal wrote:
> Thx, cym. I have a question about a D strings though. In c++ I 
> would just reuse the string buffer with the "=" how can I clear 
> the string after i store a line in the buffer and do something 
> with it. I also tried to append a line to an array of strings 
> but it failed because the line is a char?

In D you can do as in C++:

buffer = "";  // or a brand new string

You can also reset a variable to its initial state (what you 
would hav had if you hadn't initialized it) using:

buffer.init();

When reading files the default type you get is dchar[]. There are 
different kind of strings in D, you way want to check 
http://dlang.org/arrays.html#strings . If you want to append to 
an array of strings, simply convert your line to type string:

import std.conv;
import std.stdio;

void main() {
     string[] buffer;

     foreach (line ; File("test.txt").byLine)
         buffer ~= line.to!string;     // <- Here is the magic

     writeln(buffer);
}