Port of Python's difflib.SequenceMatcher class

[Oskar Linde]

Bill Baxter wrote:

> V get(V,K)(V[K] dict, K key, V def = V.init)
> {
>     V* ptr = key in dict;
>     return ptr? *ptr: def;
> }
> 
[snip]
>     char[][int] i2s;
>     i2s[1] = "Hello";
>     i2s[5] = "There";
> 
>     writefln( i2s.get(1, "yeh") );
>     writefln( i2s.get(2, "default") );
>     writefln( i2s.get(1) );
>     writefln( i2s.get(2) );
> 
> Too bad the template version doesn't work.
> D doesn't seem to be able to pick out the V and K from an associative 
> array argument.

Sorry, i missed this part. The compiler is confused by not being able to 
tell if V should be char[] or char[3].

writefln( i2s.get(1, "yeh"[]) );
writefln( i2s.get(2, "default"[]) );

both works. So you are right. The IFTI could perhaps be improved by 
figuring out that both V argument types are implicitly convertible to 
the same type.

/Oskar