duplicates
Grouping by multiple columns to find duplicate rows pandas
You need duplicated with parameter subset for specify columns for check with keep=False for all duplicates for mask and filter by boolean indexing: df = df[df.duplicated(subset=[‘val1′,’val2’], keep=False)] print (df) id val1 val2 0 1 1.1 2.2 1 1 1.1 2.2 3 3 8.8 6.2 4 4 1.1 2.2 5 5 8.8 6.2 Detail: print (df.duplicated(subset=[‘val1′,’val2’], … Read more
Strong Name sn.exe: Failed to install key pair — Object already exists
I have managed to resolve my issue, without fully understanding the cause. I found a post about a similar issue here, but did not fit my circumstance precisely, as I had only ever logged on to my machine as a single user. The post showed how to delete the container, but I couldn’t do this … Read more
Android Studio – How to copy a project?
I’m a newcomer to Android and AndroidStudio (AS) and I’ve laboured for many hours trying to use AS to ‘clone’ a project. Many thanks for the existing answers given above that set me on the right path. For any total newbie’s, like myself, the following detailed step-by-step instructions should prove useful: Using Windows Explorer, navigate … Read more
MySQL duplicate entry error even though there is no duplicate entry
Your code and schema are OK. You probably trying on previous version of table. http://sqlfiddle.com/#!2/9dc64/1/0 Your table even has no UNIQUE, so that error is impossible on that table. Backup data from that table, drop it and re-create. Maybe you tried to run that CREATE TABLE IF NOT EXIST. It was not created, you have … Read more
Remove duplicate CSS declarations across multiple files
I wrote a tool specifically for this purpose called csscss. As a bonus it also integrates with Sass and LESS. Give it a shot and let me know if you have an issues in github.
Dealing with duplicate contacts due to linked cards in iOS’ Address Book API
One method would be to only retrieve the contacts from the default address book source: ABAddressBookRef addressBook = ABAddressBookCreate(); NSArray *people = (__bridge NSArray *)ABAddressBookCopyArrayOfAllPeopleInSource(addressBook, ABAddressBookCopyDefaultSource(addressBook)); But that is lame, right? It targets the on-device address book, but not extra contacts that might be in Exchange or other fancy syncing address books. So here’s the … Read more
What exception type should be thrown when trying to add duplicate items to a collection? [closed]
Well, Dictionary<,>.Add() throws ArgumentException if such key already exists, so I guess this could be a precedent.
How to remove duplicate entries from a mysql db?
This command adds a unique key, and drops all rows that generate errors (due to the unique key). This removes duplicates. ALTER IGNORE TABLE table ADD UNIQUE KEY idx1(title); Edit: Note that this command may not work for InnoDB tables for some versions of MySQL. See this post for a workaround. (Thanks to “an anonymous … Read more