unique

问题 In my data.frame I have three columns on the SUBJECT of a row. I want an additional column with a unique subject for each row. First, how my data looks like: DATE <- c("1","2","3","4","5","6","7","1","2","3","4","5","6","7") COMP <- c("A", "A", "A", "A", "A", "A", "A", "B", "B", "B", "B", "B", "B", "B") RET <- c(-2.0,1.1,3,1.4,-0.2, 0.6, 0.1, -0.21, -1.2, 0.9, 0.3, -0.1,0.3,-0.12) CLASS <- c("positive", "negative", "aneutral", "positive", "positive", "negative", "aneutral", "positive",

问题 I have an excel file which gets updated on a daily basis i.e the data is always different every time. I am pulling the data from the Excel sheet into the table using Talend . I have a primary key Company_ID defined in the table. The error I am facing is that the Excel sheet has few duplicate Company_ID values. It will also pick up more duplicate values in the future as the Excel file will be updated daily. I want to choose the first record where the Company ID field is 1 and the record doesn

问题 I'll try explain this as well as I can. I've created a function that uses Tkinter's tkFileDialog.askopenfilename() to let you select a photograph. The script comes back with the coordinates in two variables: def getCoordinates(): # code to get coordinates here # variables for lat and long global latitude global longitude latitude longitude Now, I've created a function that calls the first function getCoordinates() TWICE. So this asks for TWO photographs to be selected. def TwoPic(): run = 0

问题 i want to add (product) ids to a "table of numbers" in PL/SQL. Is there a option to check if the table contains a specific number? i created the table with: type list_of_produktid_t IS TABLE OF NUMBER INDEX BY binary_integer; now i iterate over a big table which contains some informations about the product. This informatons, i need to group and order the products. So i can't use the "unique" keyword in the select clause i need something like: IF NOT list_of_produktid.contains(l_items(i).item

问题 It's not clear for me from the documentation if a db4o server in java without persistent class can handle unicity constraint, I see nothing saying no, but the way to configure it on the server we need the class on the classpath. (and I don't want that in that case). Same question for indexes ? Thanks in advance. 回答1: My recommendation: Don't do a db4o server without the persistent classes available. That leads to countless issues. Anyway, you should be able to just specify the full qualified

问题 I'm struggling tremendously with this problem. I have a row (B14:CW15) of integers that count how many times each unique string occurs within the original string. It is structured like so. Biagrams: +h hb bl I) )m mj jk km mm mk k^ mm +h Unique Biagrams: +h hb bl I) )m mj jk km mm mk k^ Biagram Count: 2 1 1 1 1 1 1 1 2 1 1 I can't for the life of my figure out how I can extract the top n biagrams from this without excel selecting duplicate biagrams. The Large() function has not worked as it

问题 This is an add-on to this question here I have a table like this: ID_____PostingDate_____PosterID____CategoryID ---------------------------------------------- 1______05/01/2012______450_________a 2______05/30/2012______451_________a 3______06/17/2012______451_________b 4______12/10/2012______451_________c 5______06/14/2012______452_________l 6______09/15/2012______452_________l 7______05/01/2012______453_________m 8______07/04/2012______453_________n 9______04/05/2013______454_________p 10___

问题 I have a schema. And the only prescription, is a uniqueness validation. User.path("email").validate(hasUnique("email"), "uniqueness"); hasUnique returns the function that will be used by mongoose to validate the uniqueness of the value. function hasUnique(key) { return function(value, respond) { var query = {}; query[key] = /A regex used to look up the email/; User.findOne(query, function(err, user) { respond(!user); } } } This works well when a new document is created. But when I query a

问题 As MySQL-Noob I am struggeling to solve the following task: Assuming 3 tables: location groceries and person with the following properties: Every table has a primary autoincremented integer id and a varchar column. The entrys in the tables are all unique. Every entry in groceries has a foreign key of an entry in person . It is possible that more then one entry from groceries share the same foreign key. (3) and (4) apply to person and location , too So we have a many to one to many relation.

问题 I have my facilityListArray as below and I have clinicServices array inside it and I want to filter only unique elements from this clinicServices (get unique parentName object ) array list. Below is the screen shot of facilityListArray. In the attached image, I have shown the expanded list for first array list which has list of clinicService. Similarly inside second list, I have list of clinicServices which has duplicates of the first list. So i want to get only unique clincServices from