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NSString: Get all matching NSRange of a substring
- (NSArray *)rangesInSubstring:(NSString *)substring
{
NSError *error = NULL;
NSString *regex = [NSString stringWithFormat:@"\\b%@", substring];
NSRegularExpression *regExpression = [NSRegularExpression regularExpressionWithPattern:regex options:NSRegularExpressionCaseInsensitive error:&error];
NSMutableArray *ranges = [NSMutableArray array];
NSArray *matches = [regExpression matchesInString:self options:NSRegularExpressionSearch range:NSMakeRange(0, self.length)];
for (NSTextCheckingResult *match in matches) {
[ranges addObject:[NSValue valueWithRange:match.range]];
}
return ranges;
}
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