Samuel Lampa:
python has an even more compact syntax for creating generator
objects:
D doesn't have a generator syntax, but it's easy to do what you
want using UFCS in D.
gen_lines = (line.rstrip("\n") for line in open("infile.txt"))
gen_uppercase_lines = (line.upper() for line in gen_lines)
gen_final_lines = ("Line: " + line for line in gen_lines)
# Drive the pipeline, one line at a time
for line in gen_final_lines:
print line
==>
import std.stdio, std.algorithm, std.string;
void main() {
auto gen = File("infile.txt")
.byLine()
.map!chomp
.map!toUpper
.map!(line => "Line: " ~ line);
writefln("%-(%s\n%)", gen);
}
Bye,
bearophile
