duplicates

问题 I know what the error means, and why it's occurring, meaning this is not a duplicate of the many topics covering State 23000. I'm using PDO to insert a duplicate record into a table that has a compound PK. I did this on purpose, in order to automatically cancel the insertion of any duplicated records in to this specific table. The error, SQLSTATE[23000]: Integrity constraint violation , is killing the script. Is there a way to set the warn level for this particular error, to literally tell it

问题 This question already has answers here : Finding ALL duplicate rows, including “elements with smaller subscripts” (5 answers) Remove all duplicate rows including the “reference” row [duplicate] (3 answers) Closed 4 years ago . For example I have two columns: Var1 Var2 1 12 1 65 2 68 2 98 3 49 3 24 4 8 5 67 6 12 And I need to display only values which are unique for column Var1: Var1 Var2 4 8 5 67 6 12 I can do you like this: mydata=mydata[!unique(mydata$Var1),] But when I use the same formula

问题 Yeah, I know I post a lot of questions, but thats because I either need assurance that I am doing it right, what I am doing wrong, or if I am totally clueless, and cant find anything in the documentation. Anyways, I am trying to check for duplicate nodes. Here is how I would want to do it: Loop thru my nodes, and compare each single node's text (record), but if I got many nodes, wouldnt that be too time and memory consuming? Would there be a better approach for this? Thanks! - Jeff. EDIT:

问题 I have found somewhat similar questions however the answers that I think could work are too complex for me to morph into what I need. I could use some help figuring out how to accomplish the following in Python: I have a CSV file which contains three columns of data. In the first column I have duplicate values (as in duplicated in other rows) of which I need to combine to a single row along with specific data from columns two and three. The result should be another CSV. In addition, for each

问题 Problem here is that I'm getting duplicates in my table view and I know why but I don't know how to fix it and implement a different system. My app is a blog reader that reads from a MYSQL database using PHP to send JSON to my Swift app. My table view has two sections, one for all the objects from the database and second section is for when I click the follow button on the cells, basically move the objects from mainArray to followedArray. Each section is using an array so for example I move

问题 I have MyObject with field: id, a, b, c, e, f and I have List with 500 000 items, now how can I remove all duplicate items with of the same value of the parameter a, c, f? I am looking for only the fastest and most efficient method. UPDATE I implemented comparator Fields in my class are of different types so I use ToString() . It is good way? IdLoc , IdMet , Ser are long? Value is Object IdDataType is long class Comparer : IEqualityComparer<MyObject> { public bool Equals(MyObject x, MyObject

问题 I'm looking for the most efficient way to rename (append-1, -2 etc.) a variable, if it already exists in a string. So I'm keeping an array" dupeCheck = []; And as soon as I see that a variable: var UID; Is already in my dupeCheck array, I want to immediately append the value of UID with -1, Also, I need to prevent a third duplicate becoming string-1-1, but rather string-2.. I saw this: Appending the count to duplicates in a javascript string array before, but It's nog exactly what I want...

问题 How to Duplicate a UIView. requirement is there should be two views inside a view for ex consider View A and View B. changing one view also should change another view. for example consider am added a mpmediaplayer in view A means view B should show same video which is there in view A and if i moving anything in view A means ie forwarding video, volume control etc.. the scond view shold display the same thing. 回答1: There is no easy way to clone a view and then to update two views by one line

问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: Easiest way to find duplicate values in a JavaScript array Javascript array sort and unique I have the following array var output = new array(7); output[0]="Rose"; output[1]="India"; output[2]="Technologies"; output[3]="Rose"; output[4]="Ltd"; output[5]="India"; output[6]="Rose"; how can i remove the duplicate elements in above array.Is there any methods to do it? 回答1: You can write a function like this function

问题 Given x <- cbind(c(10,15,20,20,25,30,30,30,35,40,40,40,40,45),rep(c('M','F'),7)) , I want to calculate the rank sums of of categories M and F automatically , without doing it by hand. The thing I couldn't figure out is how to adjust the rank numbers when there is a tie. In this case, #3 and #4 are both 20 and thus share the rank value of 3.5 (instead of 3 and 4). Likewise #6 ~ #8 have the rank value of 7, and #10 ~ #13 have 11.5. Without this adjustment, the sums would be wrong. #Wrong sum