duplicates

I need to find every duplicate filenames in a given dir tree. I dont know, what dir tree user will give as a script argument, so I dont know the directory hierarchy. I tried this: #!/bin/sh find -type f | while IFS= read vo do echo `basename "$vo"` done but thats not really what I want. It finds only one duplicate and then ends, even, if there are more duplicate filenames, also - it doesnt print a whole path (prints only a filename) and duplicate count. I wanted to do something similar to this command: find DIRNAME | tr '[A-Z]' '[a-z]' | sort | uniq -c | grep -v " 1 " but it doenst work for me

I am trying to find a way to determine when a set of columns changes value in a data.frame. Let me get straight to the point, please consider the following example: x<-data.frame(cnt=1:10, code=rep('ELEMENT 1',10), val0=rep(5,10), val1=rep(6,10),val2=rep(3,10)) x[4,]$val0=6 The cnt column is a unique ID (could be a date, or time column, for simplicity it's an int here) The code column is like an code for the set of rows (imagine several such groups but with different codes). The code and cnt are the keys in my data.table. The val0,val1,val2 columns are something like scores. The data.frame

I have a table that contains, for example, two fields that I want to make unique within the database. For example: create table Subscriber ( ID int not null, DataSetId int not null, Email nvarchar(100) not null, ... ) The ID column is the primary key and both DataSetId and Email are indexed. What I want to be able to do is prevent the same Email and DataSetId combination appearing in the table or, to put it another way, the Email value must be unique for a given DataSetId. I tried creating a unique index on the columns CREATE UNIQUE NONCLUSTERED INDEX IX_Subscriber_Email ON Subscriber

Suppose I have a class Event, and it has 2 properties: action (NSString) and date (NSDate). And suppose I have an array of Event objects. The problem is that "date" properties can match. I need to remove the duplicates, meaning that 2 different objects with the same date IS a duplicate. I can remove duplicates in any array of strings or nsdates, they are easy to compare. But how to do it with complex objects, where their properties are to be compared? Don't ask me what I did so far, cos' the only thing coming in my mind is a bubble sort, but it's a newbie solution, and slow . Quite any help is