The Annoyance Filter.pdf - Fourmilab

§23 ANNOYANCE-FILTER DICTIONARY 27
23. We import a dictionary from a CSV file by importing successive records into a dictionaryWord,
which is then appended to the dictionary. When the pseudo-word containing the number of mail and junk
messages used to assemble the dictionary is encountered, those quantities are added to the running totals.
Note that the CSV input file may be in any order—it need not be sorted in the order exportCSV creates,
nor need the message count pseudo-word be the first record of the file.
〈 Class implementations 11 〉 +≡
void dictionary ::importCSV (istream &is )
{
if (verbose ) {
cerr ≪ "Importing␣dictionary␣from␣CSV␣file." ≪ endl ;
}
}
dictionaryWord dw ;
while (dw .importCSV (is )) {
if (dw .getJunkProbability ( ) ≡ −1 ∧ (dw .get ( ) ≡ pseudoCountsWord )) {
messageCount [dictionaryWord ::Mail ] += dw .n mail ( );
messageCount [dictionaryWord ::Junk ] += dw .n junk ( );
}
else if (dw .getJunkProbability ( ) ≥ −1) {
include (dw ) ;
}
else {
if (verbose ) {
cerr ≪ "Ill−formed␣record␣in␣CSV␣import:␣\"" ≪ dw .get ( ) ≪ "\"" ≪ endl ;
}
}
}