Doing exercise from book, but I'm getting error with splitter

[Andrew Brown via Digitalmars-d-learn]

I'm giving up

On Monday, 16 June 2014 at 16:49:46 UTC, Andrew Brown wrote:
> Sorry, comments split over two lines, this should work:
>
> import std.stdio, std.array, std.string; //need to import
> std.array
>
> void main() {
>    ulong[string] dictionary; // the length property is ulong, 
> not
> uint
>    foreach (line; stdin.byLine()) {
>      foreach (word; splitter(strip(line))) {
>        if (word in dictionary) continue;
>        auto newID = dictionary.length;  //dictionarys need
> immutable keys, you // can create this with .idup
>        dictionary[word.idup] = newID;
>        writeln(newID, '\t', word);
>      }
>    }
> }