On Saturday, 6 December 2025 at 21:25:27 UTC, Brother Bill wrote:
```
write("foo"); // writes to the console, but it doesn't display
yet.
writeln; // Now it displays, with a new line.
```
How to force writing to the console after ```write("foo");```
I am doing this for a tutorial video, and want the
```write("foo");```
to immediately write to the console.
// A newline will force a flush: write("foo\n"); // appears
immediately
// You could also do it in an 'unsafe' C way, by disabling
buffering.
// D makes it ever so easy to simply drop into C mode code
// Or make a call to stdout.flush() - as others have noted
already.
module myModule;
import std.stdio : write;
import core.thread;
import core.stdc.stdio;
@safe:
private:
@trusted void main()
{
// Disable buffering
setvbuf(core.stdc.stdio.stdout, null, _IONBF, 0); // NOTE:
Calls into C are not @safe
write("foo"); // appears immediately
Thread.sleep(3.seconds);
// NOTE: Toggling buffering modes mid-program is unwise ;-)
// So pick one mode at startup, or use stdout.flush()
}
