duplicate-removal

I have a rather large array that contains data for all of the forums on a message board, unfortunately I am running into an issue where I am having repeat entries for some keys. The array is ordered in an hierarchy by parents, which is why it gets deep at some points. Array ( [0] => Array ( [cat_data] => Array() [forum_data] => Array ( [2] => Array ( [subforums] => Array ( [6] => Array ( [subforums] => Array ( [15] => Array() [16] => Array() ) ) [7] => Array() [15] => Array() [16] => Array() ) ) [3] => Array() ) ) ) The subforums on the forum id 6 are repeated as subforums for forum id 2. I

I have the responsibility of switching our code from sqlite to postgres. One of the queries I am having trouble with is copied below. INSERT INTO group_phones(group_id, phone_name) SELECT g.id, p.name FROM phones AS p, groups as g WHERE g.id IN ($add_groups) AND p.name IN ($phones); The problem arises when there is a duplicate record. In this table the combination of both values must be unique. I have used a few plpgsql functions in other places to do update-or-insert operations, but in this case I can do several inserts at once. I am not sure how to write a stored routine for this. Thanks for

Can anyone please let me know how to remove duplicate values from String s="Bangalore-Chennai-NewYork-Bangalore-Chennai"; and output should be like String s="Bangalore-Chennai-NewYork-"; using Java.. Any help would be appreciated. This does it in one line: public String deDup(String s) { return new LinkedHashSet<String>(Arrays.asList(s.split("-"))).toString().replaceAll("(^\\[|\\]$)", "").replace(", ", "-"); } public static void main(String[] args) { System.out.println(deDup("Bangalore-Chennai-NewYork-Bangalore-Chennai")); } Output: Bangalore-Chennai-NewYork Notice that the order is preserved

This question already has an answer here: Get all unique values in a JavaScript array (remove duplicates) 74 answers I have string values that contain a list of items separated with a comma, e.g. the value could be val1,val2,val3,val1,val4,val3,val2,val5 . Is there an easy way I can remove all duplicates from such a string so that each value only appears once within the string ? E.g. in the above example I would like to get val1,val2,val3,val4,val5 instead. Many thanks in advance, Tim. Make an array by split string and use unique() try like this: data = "val1,val2,val3,val4,val5"; arr = $

I'm working on a large dataset with n covariates. Many of the rows are duplicates. In order to identify the duplicates I need to use a subset of the covariates to create an identification variable. That is, (n-x) covariates are irrelevant. I want to concatenate the values on the x covariates to uniquely identify the observations and eliminate the duplicates. set.seed(1234) UNIT <- c(1,1,1,1,2,2,2,3,3,3,4,4,4,5,6,6,6) DATE <- c("1/1/2010","1/1/2010","1/1/2010","1/2/2012","1/2/2009","1/2/2004","1/2/2005","1/2/2005", "1/1/2011","1/1/2011","1/1/2011","1/1/2009","1/1/2008","1/1/2008","1/1/2012","1

The question is a little complex. The problem here is to get rid of duplicates and save the unique elements of array into another array with their original sequence. For example : If the input is entered b a c a d t The result should be : b a c d t in the exact state that the input entered. So, for sorting the array then checking couldn't work since I lost the original sequence. I was advised to use array of indices but I don't know how to do. So what is your advise to do that? For those who are willing to answer the question I wanted to add some specific information. char** finduni(char

My multiple solution problem arises due to Prolog's backtracking looping through the goals. Whilst I understand that, technically, each solution provided is correct, it is not useful to me. Is there a method to remove duplicates? Here is my code so far: flight(london, paris). flight(paris, amsterdam). flight(amsterdam, rome). flight(rome, paris). flight(rome, rio_de_janeiro). route_from(A,B) :- flight(A,B). route_from(A,B) :- flight(A,R), route_from(R,B). An example query is: ?- route_from(A, paris). A = london ; A = rome ; A = london ; A = london ; A = london ; A = london ; A = london ; A =