Dear Monks,

My question is about a faster way to do phrase matching in a sentence.
+ The usual standard way would be:

$sentence="Jack and Jill went up the hill to fetch a pail of water.";
$sentence=~/pail of water/\#pail of water\#/g; #tag the phrase 'pail o
+f water' in the sentence.

However, the above method becomes too slow when I have a long list of 
+phrases and also sentences. If I have single words instead of phrases
+, I could use hash matching on 'split' sentence words, such as:

@temp=split(' ', $sentence);
my %hash=("pail of water"=>1);

foreach my $i (@temp) {
    if ($hash{$i}) {
        ---
    }
}

However, this method cannot be applied to phrases. Can something simil
+ar/faster be used for phrase tagging of sentences?

On a related note, how to club the words of the marked phrase in the s
+entence as a single unit (i.e. the phrase appears in a single array e
+lement when the split is done on the sentence on the space character)
+.

Thanks.

[download]

In reply to phrase marking by newbio

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