duplicates

问题 How to build a .bundle from source code? This might sound like a simple problem but it has been hurdling me for a week... Here is my problem: I have a bunch of .c and .h files that are organized in a folder and its sub folders. The source code was written and compiled with gcc make and tested by many other make tools. The source code has some utilities and command line tools and it has more code that serve as library for those utilities and tools. It is the files that serve as libraries that

问题 I have a table that looks like this: name | surname<br> John | John<br> Jessica | Madson<br> I have a query like this: SELECT * FROM table WHERE name LIKE '%j%' OR surname LIKE '%j%' What I get: John John John John Jessica Madson What I want: John John Jessica Madson How can I get rid of the duplicate results? 回答1: Use DISTINCT : SELECT DISTINCT name, surname FROM yourtable WHERE name LIKE '%j%' OR surname LIKE '%j%' 回答2: Try: SELECT DISTINCT name, surname FROM table WHERE name LIKE '%j%' OR

问题 I've declared a constant with the same name in some different classes, in their .m file, this way: @implementation MyViewController const NSInteger numberOfItems = 6; ... @end But I get a "duplicate symbol" error when trying to build the project. I've found several posts dealing with this issue regarding extern or global constants, but what I'd want is just declaring some constants private to their class, how can I do that? Thanks 回答1: If you want to use constant only in one .m file then

问题 I have a list of lists (sublist) that contains numbers and I only want to keep those exists in all (sub)lists. Example: x = [ [1, 2, 3, 4], [3, 4, 6, 7], [2, 3, 4, 6, 7]] output => [3, 4] How can I do this? 回答1: common = set(x[0]) for l in x[1:]: common &= set(l) print list(common) or: import operator print reduce(operator.iand, map(set, x)) 回答2: In one liner: >>> reduce(set.intersection, x[1:], set(x[0])) set([3, 4]) 回答3: def f(a, b): return list(set(a).intersection(set(b))) reduce(f, x) 回答4

问题 I have a list of lists (sublist) that contains numbers and I only want to keep those exists in all (sub)lists. Example: x = [ [1, 2, 3, 4], [3, 4, 6, 7], [2, 3, 4, 6, 7]] output => [3, 4] How can I do this? 回答1: common = set(x[0]) for l in x[1:]: common &= set(l) print list(common) or: import operator print reduce(operator.iand, map(set, x)) 回答2: In one liner: >>> reduce(set.intersection, x[1:], set(x[0])) set([3, 4]) 回答3: def f(a, b): return list(set(a).intersection(set(b))) reduce(f, x) 回答4

问题 When using LOAD DATA INFILE, is there a way to either flag a duplicate row, or dump any/all duplicates into a separate table? 回答1: From the LOAD DATE INFILE documentation: The REPLACE and IGNORE keywords control handling of input rows that duplicate existing rows on unique key values: If you specify REPLACE, input rows replace existing rows. In other words, rows that have the same value for a primary key or unique index as an existing row. See Section 12.2.7, “REPLACE Syntax”. If you specify

问题 This question already has answers here : Python: Uniqueness for list of lists (5 answers) Closed 2 years ago . I have a list of lists that looks like this: animal_groups = [['fox','monkey', 'zebra'], ['snake','elephant', 'donkey'],['beetle', 'mole', 'mouse'],['fox','monkey', 'zebra']] What is the best to remove duplicate lists? Using the above example, I am looking for code that would produce this: uniq_animal_groups = [['fox','monkey', 'zebra'], ['snake','elephant', 'donkey'],['beetle',

问题 I'am attempting to build a register page and the current code runs correctly but I'am getting duplicate inserts on the DB side. I've researched and have tried several different solutions but nothing has worked out yet. I'm hoping its something very simple that I'am missing. How can I prevent my current code from inserting twice? <?php session_start(); $error=''; // Variable To Store Error Message if (isset($_POST['register'])) { //if (empty($_POST['email']) || empty($_POST['hash'])) { //

问题 Using MySQL 5.1.49, I'm trying to implement a tagging system the problem I have is with a table with two columns: id(autoincrement) , tag(unique varchar) (InnoDB) When using query, INSERT IGNORE INTO tablename SET tag="whatever" , the auto increment id value increases even if the insert was ignored. Normally this wouldn't be a problem, but I expect a lot of possible attempts to insert duplicates for this particular table which means that my next value for id field of a new row will be jumping

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . Lets compile a list of 3rd party java libraries that we like and/or find useful. I will post my choices as a reply 回答1: Google Collections Google Collections rules. Gives you predicates, BiMaps, synchronization wrappers around java.util collections, etc. 回答2: Lucene "Apache Lucene is a high-performance, full