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POHow to remove all objects with the same property value but one in NSMutableArray
 

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  1. POHow to remove all objects with the same property value but one in NSMutableArray
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    <p>I have a history object with a url string property and title. I want to search all the history for objects with the url containing a search string, then remove all duplicates. </p> <p>Example: I have an array of history objects and 20 of them are all "<a href="https://www.google.com" rel="nofollow">https://www.google.com</a>" and 4 are "<a href="https://www.google.com/#q=search" rel="nofollow">https://www.google.com/#q=search</a>", I want to get an array back with only one object with the url value of "<a href="https://www.google.com" rel="nofollow">https://www.google.com</a>" and one url value of "<a href="https://www.google.com/#q=search" rel="nofollow">https://www.google.com/#q=search</a>"</p> <p>Here is my current code that searches the history and returns all objects matching the string:</p> <pre><code> - (NSArray *)historyObjectsContainingQuery:(NSString *)query { NSMutableArray *matchingObjects = [[NSMutableArray alloc] init]; HistoryManager *HM = [HistoryManager sharedInstance]; for (int i=0; i&lt;[[HM history] count]; i++) { //History "days" HistoryObject *historyItem = HistoryObject([[HistoryManager sharedInstance] history][i]); for (int o=0; o&lt;[historyItem.objects count]; o++) { //Each object inn each history day HistoryObject *HO = HistoryObject(historyItem.objects[o]); if ([HO.title rangeOfString:query options:NSCaseInsensitiveSearch].location != NSNotFound) { //history objects with their title containing the query string [matchingObjects addObject:HO]; } } } return matchingObjects; } </code></pre> <p>Then i log each url value:</p> <p>self.foundInBookmarksAndHistory = [self historyObjectsContainingQuery:textField.text]; for (HistoryObject *HO in self.foundInBookmarksAndHistory) { NSLog(@"%@",HO.url); }</p> <p>and here is the results:</p> <pre><code>https://www.google.com/ 2013-09-15 13:48:49.382 Flow HD[3599:60b] https://www.google.com/ 2013-09-15 13:48:49.384 Flow HD[3599:60b] https://www.google.com/ 2013-09-15 13:48:49.385 Flow HD[3599:60b] https://www.google.com/ 2013-09-15 13:48:49.387 Flow HD[3599:60b] https://www.google.com/ 2013-09-15 13:48:49.388 Flow HD[3599:60b] https://www.google.com/ 2013-09-15 13:48:49.390 Flow HD[3599:60b] https://www.google.com/ 2013-09-15 13:48:49.391 Flow HD[3599:60b] https://www.google.com/search?q=yahoo 2013-09-15 13:48:49.392 Flow HD[3599:60b] https://www.google.com/ 2013-09-15 13:48:49.394 Flow HD[3599:60b] https://www.google.com/ 2013-09-15 13:48:49.395 Flow HD[3599:60b] https://www.google.com/search?q=Sup 2013-09-15 13:48:49.397 Flow HD[3599:60b] https://www.google.com/ 2013-09-15 13:48:49.398 Flow HD[3599:60b] https://www.google.com/ 2013-09-15 13:48:49.400 Flow HD[3599:60b] https://www.google.com/ 2013-09-15 13:48:49.402 Flow HD[3599:60b] https://www.google.com/ 2013-09-15 13:48:49.404 Flow HD[3599:60b] https://www.google.com/ 2013-09-15 13:48:49.405 Flow HD[3599:60b] https://www.google.com/ </code></pre> <p>There is A LOT more, how can i remove each object with that same value? the objects are not equal, but do have equal urls.</p> <p>I've tried NSPredicate and using more for loops to go through and find matching objects but im always left with 2 or more of the same objects with the same property.</p>
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