duplicates

问题 OK This is driving me nuts since a day. I am mainly an iOS guy so i dont know much about Proguard and stuff. I have made an Android app which includes both dropbox and Google Drive API. The app is working great if i deploy it on a phone thru Eclipse but I am getting a nasty error on Console when i try to export the app for apk file generation. My project.properties files was like so... # To enable ProGuard to shrink and obfuscate your code, uncomment this (available properties: sdk.dir, user

问题 I have an array a as follows: a = [ 1 2; 3 4; 1 2 ]; I want to delete all rows appearing more than once in a and get c : c = [ 3 4 ]; Please note that this is not the same operation as keeping unique rows, since I don't want rows that had duplicates to appear at all. How can I accomplish this? 回答1: The third output of unique gives you the index of the unique row in the original array. You can use this with accumarray to count the number of occurrences, which can be used to select rows that

问题 I am aiming to identify and keep DUPLICATE, TRIPLICATE, etc. lines, i.e., all lines that occur more than once in Notepad++? In other words, how can I delete all unique lines only? For example, here are seven (7) separate lists and the desired true duplicate lines of each lists (shown as 7 columns, regard each column as an individual list or file!). (The lists here are shown side by side only to save space , in real life, each of the 7 lists occurs alone and independently from the others and

问题 I have a large data.frame (20000+ entries) in this format: id D1 D2 1 0.40 0.21 1 0.00 0.00 1 0.53 0.20 2 0.17 0.17 2 0.25 0.25 2 0.55 0.43 Where each id may be duplicated 3-20 times. I would like to merge the duplicated rows into new columns, so my new data.frame looks like: id D1 D2 D3 D4 D5 D6 1 0.40 0.21 0.00 0.00 0.53 0.20 2 0.17 0.17 0.25 0.25 0.55 0.43 I've manipulated data.frames before with plyr, but I'm not sure how to approach this problem. Any help would be appreciated.Thanks. 回答1

问题 I have this table messages ; sender_id recipient_id 1 2 1 3 1 3 2 1 3 1 2 3 I wish to select rows such that: Either sender_id or receiver_id = current_user.id . The other field should be unique. I.e. I want to select unique from table where sender_id = 2 or recipient_id = 2 and I need this result: sender_id recipient_id 2 1 2 3 How to do it? Why? Because I wish to build a facebook-like inbox in which sent and received messages are aggregated, and this query is the bottleneck so far. I am

问题 I have this table messages ; sender_id recipient_id 1 2 1 3 1 3 2 1 3 1 2 3 I wish to select rows such that: Either sender_id or receiver_id = current_user.id . The other field should be unique. I.e. I want to select unique from table where sender_id = 2 or recipient_id = 2 and I need this result: sender_id recipient_id 2 1 2 3 How to do it? Why? Because I wish to build a facebook-like inbox in which sent and received messages are aggregated, and this query is the bottleneck so far. I am

问题 I'm looking for a tool to find duplicate or similar code of Java/Javascript. I can't tell the exact definition of " similar ", but I wish the tool is smart enough and give me advices to refactor the code, e.g., (1) class A and class B have imilar methods (e.g., there 5 methods have same method name, arguments and similar implementation appearing in both classes), then it should advise to move these similar methods into a base class. (2) class A has similar code lines at different places

问题 I am looking for a way to save or update records, according to the table's unique key which is composed of several columns). I want to achieve the same functionality used by INSERT ... ON DUPLICATE KEY UPDATE - meaning to blindly save a record, and have the DB/Hibernate insert a new one, or update the existing one if the unique key already exists. I know I can use @SQLInsert( sql="INSERT INTO .. ON DUPLICATE KEY UPDATE") , but I was hoping not to write my own SQLs and let Hibernate do the job

问题 I have an array of values that I use as a reference for order when I'm printing out hash values. I'd like to modify the array so that the array values are "prettier". I figured I'd just dup or clone the array, change the values and the original object would remain unchanaged. However (in irb)... @arr = ['stuff', 'things'] a = @arr.clone b = @arr.dup So, at the very least, a and @arr are different objects: a.object_id == @arr.object_id => false But now it gets strange a[0].capitalize! a => [

问题 Given a list of lists, I want to make sure that there are no two lists that have the same values and order. For instance with my_list = [[1, 2, 4, 6, 10], [12, 33, 81, 95, 110], [1, 2, 4, 6, 10]] it is supposed to return me the existence of duplicate lists, i.e. [1, 2, 4, 6, 10] . I used while but it doesn't work as I want. Does someone know how to fix the code: routes = [[1, 2, 4, 6, 10], [1, 3, 8, 9, 10], [1, 2, 4, 6, 10]] r = len(routes) - 1 i = 0 while r != 0: if cmp(routes[i], routes[i +