duplicates

问题 Here is the error message I receive when compiling ... Ld /Users/ilia3546/Library/Developer/Xcode/DerivedData/MasterDetail-fhgogwnbpzovbtaskgecptdnvgjs/Build/Products/Debug-iphonesimulator/MasterDetail.app/MasterDetail normal i386 cd /Users/ilia3546/Проекты/iDecide setenv IPHONEOS_DEPLOYMENT_TARGET 5.0 setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"

问题 I'm trying to remove duplicate values in my dict but its not working: samples_antibiotics_with_duplicates = {'S00541-09': ['Streptomycin', 'Sulfamethoxazole', 'Trimethoprim', 'Spectinomycin', 'Streptomycin', 'Streptomycin', 'Trimethoprim']} samples_antibiotics = {} for key,value in samples_antibiotics_with_duplicates.iteritems(): if value not in samples_antibiotics.values(): samples_antibiotics[key] = value print samples_antibiotics This prints: {'S00541-09': ['Streptomycin',

问题 I have this cell array in MATLAB: y = { 'd' 'f' 'a' 'g' 'g' 'a' 'w' 'h'} I use unique(y) to get rid of the duplicates but it rearranges the strings in alphabetical order: >> unique(y) ans = 'a' 'd' 'f' 'g' 'h' 'w' I want to remove the duplicates but keep the same order. I know I could write a function do do this but was wondering if there was a simpler way using unique to remove duplicates while keeping the same order just with the duplicates removed. I want it to return this: >> unique(y)

问题 Question: in pandas when dropping duplicates you can specify which columns to keep. Is there an equivalent in Spark Dataframes? Pandas: df.sort_values('actual_datetime', ascending=False).drop_duplicates(subset=['scheduled_datetime', 'flt_flightnumber'], keep='first') Spark dataframe (I use Spark 1.6.0) doesn't have the keep option df.orderBy(['actual_datetime']).dropDuplicates(subset=['scheduled_datetime', 'flt_flightnumber']) Imagine 'scheduled_datetime' and 'flt_flightnumber' are columns 6

问题 I'm trying to follow Ryan Bates RailsCast #196: Nested model form part 1. There're two apparent differences to Ryans version: 1) I'm using built-in scaffolding and not nifty as he's using, and 2) I'm running rails 4 (I don't really know what version Ryans using in his cast, but it's not 4). So here's what I did rails new survey2 cd survey2 bundle install rails generate scaffold survey name:string rake db:migrate rails generate model question survey_id:integer content:text rake db:migrate Then

问题 I have written a query to remove duplicate records from a table ;WITH a as ( SELECT Firstname,ROW_NUMBER() OVER(PARTITION by Firstname, empID ORDER BY Firstname) AS duplicateRecCount FROM dbo.tblEmployee ) --Now Delete Duplicate Records DELETE FROM tblEmployee WHERE duplicateRecCount > 1 But I don't know where I went wrong it is saying Invalid column name duplicateRecCount Can someone help me? 回答1: You need to reference the CTE in the delete statement... WITH a as ( SELECT Firstname,ROW

问题 What is the simplest way to delete records with duplicate name in a table? The answers I came across are very confusing. Related: Removing duplicate records from table 回答1: I got it! Simple and it worked great. delete t1 from tTable t1, tTable t2 where t1.locationName = t2.locationName and t1.id > t2.id http://www.cryer.co.uk/brian/sql/sql_delete_duplicates.htm 回答2: SQL Server 2005: with FirstKey AS ( SELECT MIN(ID), Name, COUNT(*) AS Cnt FROM YourTable GROUP BY Name HAVING COUNT(*) > 1 )

问题 I have a MySQL table like: ID, Col1, Col2, Col3, Col4, etc... ID is a primary key and has been working since the table's creation. What I want to do is delete all but one records where all the other columns are identical. 回答1: DELETE DupRows.* FROM MyTable AS DupRows INNER JOIN ( SELECT MIN(ID) AS minId, col1, col2 FROM MyTable GROUP BY col1, col2 HAVING COUNT(*) > 1 ) AS SaveRows ON SaveRows.col1 = DupRows.col1 AND SaveRows.col2 = DupRows.col2 AND SaveRows.minId <> DupRows.ID; Of course you

问题 I'm trying to add a library to my project, right now my current build.gradle is: apply plugin: 'com.android.application' android { compileSdkVersion 21 buildToolsVersion "21.1.2" repositories { mavenCentral() } defaultConfig { applicationId "com.example.guycohen.cheaters" minSdkVersion 11 targetSdkVersion 21 versionCode 1 versionName "1.0" // Enabling multidex support. multiDexEnabled true } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'

问题 I have an array of integers that I need to remove duplicates from while maintaining the order of the first occurrence of each integer. I can see doing it like this, but imagine there is a better way that makes use of STL algorithms better? The insertion is out of my control, so I cannot check for duplicates before inserting. int unsortedRemoveDuplicates(std::vector<int> &numbers) { std::set<int> uniqueNumbers; std::vector<int>::iterator allItr = numbers.begin(); std::vector<int>::iterator