duplicates

问题 How do I prevent duplicate entries into a list, and then ideally, sort that list? What I'm doing, is when information at one level is missing, taking the information from a level below it, to building the missing list, in the level above. Currently, I have XML similar to this: <c03 id="ref6488" level="file"> <did> <unittitle>Clinic Building</unittitle> <unitdate era="ce" calendar="gregorian">1947</unitdate> </did> <c04 id="ref34582" level="file"> <did> <container label="Box" type="Box">156<

问题 I have two tables. One for users and one for posts. The users table has the following fields: id, username, password, created_at, modified_at The posts table has the following fields: id, user_id, title, body, created_at, modified_at When I use a query like: SELECT * FROM `users` LEFT OUTER JOIN `posts` ON users.id=posts.user_id And fetch the results using PDO: $sth = $this->$default_connection->prepare($query); $sth->execute(); $sth->fetchAll(PDO::FETCH_ASSOC); The returned array overwrites

问题 How can I check for duplicate email addresses in PHP , with the possibility of Gmail's automated labeler and punctuation in mind? For example, I want these addressed to be detected as duplicates: username@gmail.com user.name@gmail.com username+label@gmail.com user.name+label@gmail.com Despite what Daniel A. White claims: In Gmail, dots at random places before the '@' (and label) can be placed as much as you like. user.name@gmail.com and username@gmail.com are in fact the same user. 回答1:

问题 I want to duplicate a model instance (row) in SQLAlchemy using the orm. My first thought was to do this: i = session.query(Model) session.expunge(i) old_id = i.id i.id = None session.add(i) session.flush() print i.id #New ID However, apparently the detached object still "remembers" what id it had, even though I set the id to None while it was detached. Thus, session.flush() tries to execute an UPDATE changing the primary key to null. Is this expected behavior? How can I remove the 'memory' of

问题 I have a Ruby array which contains duplicate elements. array = [1,2,2,1,4,4,5,6,7,8,5,6] How can I remove all the duplicate elements from this array while retaining all unique elements without using for-loops and iteration? 回答1: array = array.uniq The uniq method removes all duplicate elements and retains all unique elements in the array. One of many beauties of Ruby language. 回答2: You can also return the intersection. a = [1,1,2,3] a & a This will also delete duplicates. 回答3: You can remove

问题 I have the below XML <Automobiles> <Cars> <YearofMfr>2010</YearofMfr> <Mileage>12</Mileage> <MeterReading>1500</MeterReading> <Color>Red</Color> <Condition>Excellent</Condition> </Cars> <Cars> <YearofMfr>2010</YearofMfr> <Mileage>12</Mileage> <MeterReading>1500</MeterReading> <Color>Red</Color> <Condition>Excellent</Condition> </Cars> <Cars> <YearofMfr>2008</YearofMfr> <Mileage>11</Mileage> <MeterReading>20000</MeterReading> <Color>Pearl White</Color> <Condition>Good</Condition> </Cars> <

问题 In my code this command is run only once: jQuery("#commentrating").append('A'); but inside the div #commentrating there appears two "A" elements! What may be causing this bug? P.S. .after() is buggy as well :S 回答1: Maybe it's caused by event-bubbling.(just a guess as long as no further info is available) Assuming this: <script type="text/javascript"> jQuery( function($) { $('div') .click(function(e) { $('span',this).append('A'); } ); } ); </script> <div><div><b>click here:</b><span></span><

问题 I was wondering if anyone could help me out, I'm trying to find a script that will check my entire array and remove any duplicates if required, then spit out the array in the same format. Here's an example of my array (as you will see there are some duplicates): Array ( [0] => Array ( [0] => stdClass Object ( [bid] => 34 [name] => Adrianos Pizza & Pasta [imageurl] => sp_adrian.gif [clickurl] => # ) [1] => stdClass Object ( [bid] => 42 [name] => Ray White Mordialloc [imageurl] => sp_raywhite

问题 I am integrating my project into another app in android studio but it shows the below error, I am googling the issue but no use. Error:Execution failed for task ':app:packageAllDebugClassesForMultiDex'. > java.util.zip.ZipException: duplicate entry: android/support/v4/accessibilityservice/AccessibilityServiceInfoCompatJellyBeanMr2.class below is my app dependencies configurations { all*.exclude group: 'com.android.support', module: 'support-annotations' } dependencies { compile fileTree(dir:

问题 I have an n-by-m rectangular matrix (n != m). What's the best way to find out if there are any duplicate rows in it in MATLAB? What's the best way to find the indices of the duplicates? 回答1: Use unique() to find the distinct row values. If you end up with fewer rows, there are duplicates. It'll also give you indexes of one location of each of the distinct values. All the other row indexes are your duplicates. x = [ 1 1 2 2 3 3 4 4 2 2 3 3 3 3 ]; [u,I,J] = unique(x, 'rows', 'first')