Given the numbers in your post, "3-5", "250" and "several", I'd say
you should just split the phrase into words, write an outer loop
for(words in phraseWords), an inner loop for(tag in tags), and inside
it all compare using -isEqualToString, breaking when found. "Just do
it."
You won't even know that this happened unless you log the
millseconds. I'd bet that the amount of time you spend writing this
code is going to exceed the the CPU minutes consumed by 10,000 users
doing 100 searches per day over the 5-year life your app.
Only thing that might require a little digging -- I believe that there
is probably a "correct" way to split a phrase into a set or array of
words which will work for non-Western languages. -[NSString
componentsJoinedByString:@" "] would be a cheesy solution.
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