On Tuesday, 2 November 2021 at 23:45:39 UTC, pascal111 wrote:
Next code originally was a classic C code I've written, it's
pure vertical thinking, now, I converted it successfully to D
code, but I think I made no much changes to make it has more
horizontal thinking style that it seems D programmers care in
horizontal thinking style. Is there any additions I can make in
the code to make it suitable with D style or it's fine?
By "vertical" vs. "horizontal" thinking, do you mean imperative
vs. functional style?
https://en.wikipedia.org/wiki/Functional_programming#Imperative_vs._functional_programming
It's supported in many modern programming languages and it's not
a unique feature of the D language alone. Your code can be
changed to something like this:
import std.stdio, std.algorithm, std.conv, std.string;
void main()
{
auto numbers = [-3, 14, 47, -49, -30, 15, 4, -82, 99, 26];
char negativity, even;
write("Would you like in list (n=negatives, p=positives,
b=both)? ");
readf(" %c", &negativity);
write("Would you like in list (e=evens, o=odds, b=both)? ");
readf(" %c", &even);
numbers.filter!(x => !((negativity == 'n' && x > 0) ||
(negativity == 'p' && x < 0)))
.filter!(x => !((even == 'e' && (x % 2)) ||
(even == 'o' && !(x % 2))))
.map!text.join("\n").writeln;
}
