JavaScript (spidermonkey) version

Way to carried away with this… here’s the SpiderMonkey version (as opposed to the rhino) one. Biggest complaint is the File object is a bit of a pain to use…

fd = File('p.test');
fd.open("read",'text');

mre = /^__MULTI_TOKEN__\s+(\S+)\s+(.*)\t?\s*(\d+)\s*$/;
sre = /^__SINGLE_TOKEN__\s+(\S+)\s*\t?\s*(\d+)\s*$/;

var ofd = File('full.txt');
ofd.open('write,create,replace','text');
first = {}

while (line = fd.readln()) {
    if (m = line.match(mre)) {
        first[m[1]] = (first[m[1]] ? first[m[1]] : 0) + parseInt(m[3]);
        ofd.writeln(m[1] + " " + m[2] + "\t" + m[3]);
    } else if (m = line.match(sre)) {
        first[m[1]] = (first[m[1]] ? first[m[1]] : 0) + parseInt(m[2]);
    } else {
        print("Unknown: " + line);
    }
}

ofd.close()

ofd = File('first.txt');
ofd.open('write,create,replace','text');
for (key in first) { 
    ofd.writeln(key + "\t" + first[key]);
}
ofd.close()

This is all based on the PHP/Perl/Python performance code.