How to catenate a string multiple times ?

[H. S. Teoh]

On Sat, Mar 16, 2013 at 04:29:02PM +0100, Peter Sommerfeld wrote:
> Cannot find a reference: What is the best way
> to catenate a string multiple times ?
> Unfortunately this this does not work ;-)
> 
> string tab = "..";
> tab = tab * 4; // -> "........"
[...]

You could define something like this:

	string x(string a, int n) {
		import std.array;
		auto app = appender!string(a);
		while (--n) {
			app.put(a);
		}
		return app.data;
	}

	void main() {
		// prints "abcabcabc"
		writeln("abc".x(3));
	}

It's not as nice as "abc"*3, but unfortunately opBinary only works when
declared inside the class/struct; UFCS doesn't pick it up, so it doesn't
work on native types.


T

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