duplicate-removal

I have a table with columns for ID , firstname , lastname , address , email and so on. Is there any way to delete duplicate email addresses from the TABLE? Additional information (from comments): If there are two rows with the same email address one would have a normal firstname and lastname but the other would have 'Instant' in the firstname . Therefore I can distinguish between them. I just want to delete the one with first name 'instant'. Note, some records where the firstname='Instant' will have just 1 email address. I don't want to delete just one unique email address, so I can't just

In the documentation for mongoDB it says: "Changed in version 3.0: The dropDups option is no longer available." Is there anything I can do (other than downgrading) if I actually want to create a unique index and destroy duplicate entries? please keep in mind the I receive about 300 inserts per second so I can't just delete all duplicates and hope none will come in by the time I'm done indexing. Yes dropDupes is now deprecated since version 2.7.5 because it was not possible to predict correctly which document would be deleted in the process. Typically, you have 2 options : Use a new collection

I have an array of objects. I'd like to remove the duplicates based on the "name" value in the object. [0]=> object(stdClass)#337 (9) { ["term_id"]=> string(2) "23" ["name"]=> string(12) "Assasination" ["slug"]=> string(12) "assasination" } [1]=> object(stdClass)#44 (9) { ["term_id"]=> string(2) "14" ["name"]=> string(16) "Campaign Finance" ["slug"]=> string(16) "campaign-finance" } [2]=> object(stdClass)#298 (9) { ["term_id"]=> string(2) "15" ["name"]=> string(16) "Campaign Finance" ["slug"]=> string(49) "campaign-finance-good-government-political-reform" } So in this case, how do I remove

I am trying to remove duplicates from 2 lists. so I wrote this function: a = ["abc", "def", "ijk", "lmn", "opq", "rst", "xyz"] b = ["ijk", "lmn", "opq", "rst", "123", "456", ] for i in b: if i in a: print "found " + i b.remove(i) print b But I find that the matching items following a matched item does not get remove. I get result like this: found ijk found opq ['lmn', 'rst', '123', '456'] but i expect result like this: ['123', '456'] How can I fix my function to do what I want? Thank you. Here is what's going on. Suppose you have this list: ['a', 'b', 'c', 'd'] and you are looping over every

Here is an example of my data set; Date Time(GMT)Depth Temp Salinity Density Phosphate 24/06/2002 1000 1 33.855 0.01 24/06/2002 1000 45 33.827 0.01 01/07/2002 1000 10 13.26 33.104 24.873 0.06 01/07/2002 1000 30 12.01 33.787 25.646 0.13 08/07/2002 1000 5 13.34 33.609 25.248 0.01 08/07/2002 1000 40 12.01 34.258 26.011 1.33 15/07/2002 1000 30 12.04 34.507 26.199 0.01 22/07/2002 1000 5 13.93 33.792 25.269 0.01 22/07/2002 1000 30 11.9 34.438 26.172 0.08 29/07/2002 1000 5 13.23 34.09 25.642 0.01 I want to delete duplicate rows so that I only have one row per date, I want to do this based on the

I'm looking to remove duplicate CSS declarations from a number of files to make implementing changes easier. Is there a tool that can help me do that? Right now I'm faced with something like this: styles.css #content { width:800px; height:1000px; background: green; } styles.game.css #content { width:800px; height:1000px; background: blue; } And I want this: styles.css #content { width:800px; height:1000px; background: green; } styles.game.css #content { background: blue; } The total number of lines across all files is well over 10k, so techniques that rely on manual editing aren't an option. I