duplicates | 易学教程

How to check for duplicate CSS rules?

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问题 I messed up my css and somehow i have a lot of the duplicate rules and my 1800 something lines css file is now of 3000+ lines.. Is there any way/tool that would take my css file as input and check for all the duplicate rules? and possibly generate a css removing those redundancies? 回答1: Install Node JS https://nodejs.org/en/download/ if you have already node js installed or after installing open node command prompt window by typing node( on windows machine) in start. Type following command to

Duplicate rows in pandas DF

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问题 I have a DF in Pandas, which looks like: Letters Numbers A 1 A 3 A 2 A 1 B 1 B 2 B 3 C 2 C 2 I'm looking to count the number of similar rows and save the result in a third column. For example, the output I'm looking for: Letters Numbers Events A 1 2 A 2 1 A 3 1 B 1 1 B 2 1 B 3 1 C 2 2 An example of what I'm looking to do is here. The best idea I've come up with is to use count_values() , but I think this is just for one column. Another idea is to use duplicated(), anyway I don't want

SQL Server 2008: delete duplicate rows

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问题 I have duplicate rows in my table, how can I delete them based on a single column's value? Eg uniqueid, col2, col3 ... 1, john, simpson 2, sally, roberts 1, johnny, simpson delete any duplicate uniqueIds to get 1, John, Simpson 2, Sally, Roberts 回答1: You can DELETE from a cte: WITH cte AS (SELECT *,ROW_NUMBER() OVER(PARTITION BY uniqueid ORDER BY col2)'RowRank' FROM Table) DELETE FROM cte WHERE RowRank > 1 The ROW_NUMBER() function assigns a number to each row. PARTITION BY is used to start

Does adding a duplicate value to a HashSet/HashMap replace the previous value

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Please consider the below piece of code: HashSet hs = new HashSet(); hs.add("hi"); -- (1) hs.add("hi"); -- (2) hs.size() will give 1 as HashSet doesn't allow duplicates so only one element will be stored. I want to know if we add the duplicate element, then does it replace the previous element or it simply doesn't add it? Also, what will happen using HashMap for the same case? In the case of HashMap , it replaces the old value with the new one. In the case of HashSet , the item isn't inserted. Jimmy The first thing you need to know is that HashSet acts like a Set , which means you add your

Tools for matching name/address data [closed]

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问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 3 years ago . Here's an interesting problem. I have an oracle database with name & address information which needs to be kept current. We get data feeds from a number of different gov't sources, and need to figure out matches, and whether or not to update the db with the data, or if a new

Find duplicate rows with PostgreSQL

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We have a table of photos with the following columns: id, merchant_id, url this table contains duplicate values for the combination merchant_id, url . so it's possible that one row appears more several times. 234 some_merchant http://www.some-image-url.com/abscde1213 235 some_merchant http://www.some-image-url.com/abscde1213 236 some_merchant http://www.some-image-url.com/abscde1213 What is the best way to delete those duplications? (I use PostgreSQL 9.2 and Rails 3.) MatthewJ Here is my take on it. select * from ( SELECT id, ROW_NUMBER() OVER(PARTITION BY merchant_Id, url ORDER BY id asc) AS

how to combine duplicate rows and sum the values 3 column in excel

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Hello everyone, I have a problem to create VBA excel to duplicate data. How to combine duplicate rows and sum the values 3 column in excel? Thank you. this one uses Remove Duplicates: Sub dupremove() Dim ws As Worksheet Dim lastrow As Long Set ws = Sheets("Sheet1") ' Change to your sheet With ws lastrow = .Range("A" & .Rows.Count).End(xlUp).Row With .Range("B2:C" & lastrow) .Offset(, 4).FormulaR1C1 = "=SUMIF(C1,RC1,C[-4])" .Offset(, 4).Value = .Offset(, 4).Value End With With .Range("A1:A" & lastrow) .Offset(, 4).Value.Value = .Value End with .Range("E1:G" & lastrow).RemoveDuplicates 1, xlYes

Dealing with duplicate contacts due to linked cards in iOS' Address Book API

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问题 Some beta-users of my upcoming app are reporting that the list of contacts contain a lot of duplicate records. I'm using the result from ABAddressBookCopyArrayOfAllPeople as the data source for my customized table view of contacts, and it baffles me that the results are different from the iPhone's 'Contacts' app. When looking more closely at the Contacts app, it seems that the duplicates originate from entries with "Linked Cards". The screenshots below have been obfuscated a bit, but as you

PHP: Check for duplicate values in a multidimensional array

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I have this issue with multidimensional arrays. Given the following multidimensional array: Array( [0] => Array("a", "b", "c") [1] => Array("x", "y", "z") [2] => Array("a", "b", "c") [3] => Array("a", "b", "c") [4] => Array("a", "x", "z") ) I want to check its values and find duplicates (i.e. keys 0, 2 and 3) leaving just one key - value pair deleting the others, resulting in somthing like this: Array( [0] => Array("a", "b", "c") [1] => Array("x", "y", "z") [2] => Array("a", "x", "z") ) How can I do that?? This will remove duplicate items from your array using array_unique() : $new_arr = array

Removing Duplicates From Array of Custom Objects Swift

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I have a custom class defined as follows : class DisplayMessage : NSObject { var id : String? var partner_image : UIImage? var partner_name : String? var last_message : String? var date : NSDate? } Now I have an array myChats = [DisplayMessage]? . The id field is unique for each DisplayMessage object. I need to check my array and remove all duplicates from it, essentially ensure that all objects in the array have a unique id . I have seen some solutions using NSMutableArray and Equatable however I'm not sure how to adapt them here; I also know of Array(Set(myChats)) however that doesn't seem