duplicates

Is there a way to remove duplicate (key-value) pairs from NSDictionary ? EDIT: My description was misleading, I have duplicate pairs e.g. key1-value1 key1-value1 key2-value2 key1-value1 etc.. Vladimir reversing key-value is not good idea because not all values can be keys. You can do it with: // dict is original dictionary, newDict new dictionary withot duplicates. NSMutableDictionary * newDict = [NSMutableDictionary dictionaryWithCapacity:[dict count]]; for(id item in [dict allValues]){ NSArray * keys = [dict allKeysForObject:item]; [newDict setObject:item forKey:[keys objectAtIndex:0]]; }

I have a table, say table1, which has 3 columns: id, number, and name. id is auto_incremented. I want to achieve an sql statement which inserts entries into a table, but if the row already exists, then ignore it. However, Every time I run: INSERT INTO table1( number, name) VALUES(num, name) ON DUPLICATE KEY UPDATE number = VALUES(number), name = VALUES(name) It seems to ignore rows with matching number and name values and appends entries to the end of the table no matter what. Is there anything I can do to prevent this? I have a feeling it has something to do with having the auto_incrementing

ISSUE: Getting duplicate items, i.e more threads are getting created than the array size... Hi Folks, I am creating thread in the loop for each element of array. The real use is that the of sending a batch of messages using amazon ses. the messages are stored in the messageamazonRequestBatch and the loop runs through the batch and sends the messages. HERE IS THE CODE: Thread thrdSendEmail; try { string amazonMessageID = string.Empty; List<Thread> lstThread = new List<Thread>(); foreach (int n in arrMessageid) { thrdSendEmail = new Thread(() => { try { amazonMessageID = SendSimpleEmail_Part2

I want to read a csv File and put words " Jakarta " and " Bandung " in a combobox. Here's the input id,from, 1,Jakarta 2,Jakarta 5,Jakarta 6,Jakarta 10,Bandung 11,Bandung 12,Bandung I managed to get the words and put it in the combobox, but as you can see, the text file itself contains a lot word " Jakarta " and " Bandung " while i want to show both only once in the combobox. Here's my temporary code, which works for now but inefficient and probably can't be used if the word has more variety public String location; private void formWindowOpened(java.awt.event.WindowEvent evt) { String csvFile

I've got an old forum which contains threads with duplicate first posts (perhaps differing replies). I want to delete all but one of these threads (leaving the thread with the highest view count). I have the following SQL query to help identify duplicate threads, but I can't find a way for it to list only duplicates with the lowest value for the xf_thread.view_count column: SELECT t.thread_id, MIN(t.view_count) FROM xf_thread t INNER JOIN xf_post p ON p.thread_id = t.thread_id WHERE t.first_post_id = p.post_id GROUP BY t.title, t.username, p.message HAVING COUNT(t.title) > 1 AND COUNT(t

I have a dataframe with an id column that is repeated, with site counts. I want to know how I can remove the duplicates ID records only when Site_Count record is more than 0. Generate DF: DF <- data.frame( 'ID' = sample(100:300, 100, replace=T), 'Site_count' = sample(0:1, 100, replace=T) ) My attempt at the subset: subset(DF[!duplicated(DF$ID),], site_count > 0) But in this case it will remove all 0 site counts - I want to subset to only remove the record when there is a duplicate record with more than 0 site count. Desirable results would look something like this (notice there site IDs with 0

I have two tables like the following hotels ------ hotelID hotelName Second table operators --------- opID opName opServices opHotelID a short explanation: In the first table I have a lot of hotels which have an increment id which is unique. The second table contains all the operators offering this hotel with additional services. The opID here is unique too but the opHotelID exists multiple times, because there can be many operators offering the hotel. Now, what I want to get is the following: I want to get the HotelName and an additional Column (called Operators) which lists all the operators