An algorithm for segmentation? | Objective-C

Forum: CAT Tools Technical Help
Topic: An algorithm for segmentation?
Poster: Joakim Braun
Post title: Objective-C

Core Foundation and Cocoa on MacOS. Not very portable, but it illustrates the general approach: An object that slices up a string based on delimiters (in this case built into CFStringTokenizer). This should work across many languages and writing systems. If locale was irrelevant we wouldn't need the tokenizer and could reduce the code to one line or a couple of lines.

NSMutableArray<NSString*>* sentences = [NSMutableArray array];
CFLocaleRef locale = CFLocaleCopyCurrent ();
NSString* aStr = @"A string? With some sentences. In it!";
CFStringTokenizerRef tokenizer = CFStringTokenizerCreate(kCFAllocatorDefault, (__bridge CFStringRef) aStr, CFRangeMake(0, aStr.length), kCFStringTokenizerUnitSentence, locale);

for(;;)
{
CFStringTokenizerTokenType tokenType = CFStringTokenizerAdvanceToNextToken (tokenizer);

if(tokenType != kCFStringTokenizerTokenNone)
{
CFRange cfr = CFStringTokenizerGetCurrentTokenRange (tokenizer);

[sentences addObject:[aStr substringWithRange:NSMakeRange(cfr.location, cfr.length)]];
}
else
{
break;
}
}

CFRelease(tokenizer);
CFRelease(locale);

[Bearbeitet am 2022-02-05 20:35 GMT]