duplicates

问题 I am trying to write a simulator for playing the Powerball lottery , where the program would ask for 5 numbers (aka the white balls) and be inputted into a 6 element array and another number (the red Powerball) into the 6 th element. I need to figure out how to test for duplicates in the first 5 elements but the 6 th doesn't need to be unique. I have a loop that I thought would work but it doesn't even execute and is rather messy. Is there a more efficient way to test for duplicates, maybe

问题 I have the following query that I want to return all the duplicated rows to the user for them to decide which one to use: SELECT * FROM `table` INNER JOIN (SELECT * FROM table GROUP BY barcode HAVING (COUNT(id) > 1)) dup ON `table`.`column` = `dup`.`column` Each part of this query appears to return the correct response but when adding the 2 together I am getting duplicates of the duplicates if that makes sense. Any ideas on what is going on? My table data +----+------------------------+------

问题 I'm stumped with a problem illustrated in the sample below: "ID","NAME","PHONE","REF","DISCARD" 1,"JOHN",12345,, 2,"PETER",6232,, 3,"JON",12345,, 4,"PETERSON",6232,, 5,"ALEX",7854,, 6,"JON",12345,, I want to detect duplicates in column "PHONE", and mark the subsequent duplicates using the column "REF", with a value pointing to the "ID" of the first item and the value "Yes" for the "DISCARD" column "ID","NAME","PHONE","REF","DISCARD" 1,"JOHN",12345,1, 2,"PETER",6232,2, 3,"JON",12345,1,"Yes" 4,

问题 I'm trying to duplicate an 8-bit value to 32-bit and wanted to ask if it's possible to write a single line algorithm to duplicate the bit values. For example: 1100 1011 -> 1111 1111 0000 0000 1111 0000 1111 1111 If it's possible, I would like to understand what's the logic behind it. 回答1: It's simple - solve the simplest case, then do more complex ones. You just need to spread bits by inserting 3 zero bits between then. Once this is done, the final step is: x = (x << 0) | (x << 1) | (x << 2)

问题 I'm trying to detect duplicate IDs, http://jsfiddle.net/HB7ev/10/ And if I understand correctly: if (id in dupeUIDCheck) Checks if the value of id is in the array: dupeUIDCheck , however, it seems that the: dupeUIDCheck[id] = true; that is set at the end actually makes the check work. It doesn't really look inside the: dupeUIDCheck = $(document).find('DIV') .map(function(){ return this.id || undefined}) .toArray(); for values, that I call first. How can I fix this? For some reason I do have

问题 Just playing with OpenCarts DB to see if I can lear something. If I use the following SELECT the result returns duplicated rows: SELECT DISTINCT p.product_id AS pid, p.model AS modelo, SUBSTRING(p.model,1,25) AS substr_modelo, p.image AS foto, p.price AS preco, pd.name AS nome, cd.name AS category FROM product p LEFT JOIN product_description pd ON p.product_id = pd.product_id LEFT JOIN product_to_category p2c ON p.product_id = p2c.product_id LEFT JOIN category_description cd ON p2c.category

问题 EDIT: I seem to get the error listed below on every insert no matter what data I try to insert. So maybe my table was corrupted or something? Anyway, here's my question: I have a MySQL table CREATE TABLE `AcpConfig` ( `ndss_id` int(11) NOT NULL default '0', `acp_id` int(11) NOT NULL default '0', `run_date` date NOT NULL default '0000-00-00', `hw_5_threshold` tinyint(1) NOT NULL default '0', `stp_on` tinyint(1) NOT NULL default '0', `sort_on` tinyint(1) NOT NULL default '0', `afcs_ocr_message

问题 I have a table with rows like id, length, time and some of them are duplicates, where length and time is the same in some rows. I want to delete all copies of the first row submitted. id | length | time 01 | 255232 | 1242 02 | 255232 | 1242 <- Delete that one I have this to show all duplicates in table. SELECT idgarmin_track, length , time FROM `80dage_garmin_track` WHERE length in ( SELECT length FROM `80dage_garmin_track` GROUP BY length HAVING count(*) > 1 ) ORDER BY idgarmin_track, length

问题 My problem is very similar to the one linked below except that if there was a [2,1] element I would need that to be deleted too. Removing duplicates from a list of lists I've tried all sorts of things but just can't make it work. Any help would be much appreciated! Thanks. 回答1: Maybe what you really want is a set of set s unique = set(map(set, list_of_lists)) Edit: well, but that doesn't work. alas, sets cannot contain sets because sets are unhashable. frozenset is, though: unique = set(map

问题 I have a table with a postal code column (Dutch format, but never mind that) CREATE TABLE "TEST" ( "ID" NUMBER(10) NOT NULL ENABLE, "POSTALCODE" VARCHAR2(6) NOT NULL ENABLE, .... CONSTRAINT "TEST_PK" PRIMARY KEY ("ID") ENABLE ) I'm trying to create a trigger that limits the number of records with duplicate postal codes; only two rows may contain the same postal code at once. I tried the following code: CREATE OR REPLACE TRIGGER TR_TEST_PC BEFORE UPDATE OR INSERT OF "POSTALCODE " ON "TEST" FOR