Re: Sum informations in file....

[bearophile via Digitalmars-d-learn]

Alexandre:

I want to know if have a more better way to make this... maybe 
using lambda or tamplates....

Your code is not bad. This is a bit better (untested):


void main() {
    import std.stdio;
    import std.conv: to;

    auto lines = "oi.txt".File.byLine;

    int tot = 0;
    foreach (const line; lines) {
        if (line[0] == '1')
            tot += line[253 .. 266].to!int;
    }

    tot.writeln;
}


If you want to write in a mode functional style (untested) 
(probably it requires the 2.066beta):

void main() {
    import std.stdio, std.algorithm, std.range, std.conv;

    "oi.txt"
    .File
    .byLine
    .filter!(line => line[0] == '1')
    .map!(line => line[253 .. 266].to!int)
    .sum
    .writeln;
}


Bye,
bearophile