NSStrings - Basic Term Extraction [closed]

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I'm trying to perform basic text extraction on two NSString instances.

What is the best way to extract the list of words that are common in both strings?

E.g. if I have "It is a sunny day today" and "Today is sunny as it is summer" then the result should be an array containing "it, is, sunny, today"

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Fill 2 arrays with the terms you'll find in each array, then make a loop on one array to see if the term is present in the other one. You can improve the loop by sorting them first and stopping the search earlier.

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This should help you.

NSMutableArray *arrCommonWords =[[NSMutableArray alloc] init];
NSString *stringWithWOrds1;
NSArray *stringArray1 = [stringWithWOrds componentsSeparatedByString:@" "]; //Here put your sepqrator (I have put space)

NSString *stringWithWOrds2;
NSArray *stringArray2 = [stringWithWOrds componentsSeparatedByString:@" "]; //Here put your sepqrator (I have put space)

for(NSString *strTmp in stringArray1)
{
    for(NSString *strTmp1 in stringArray2)
    {
        if([strTmp isEqualToString:strTmp1])
        {
            [arrCommonWords addObject:strTmp];
            break;
        }
    }
}