duplicates
Select and display only duplicate records in MySQL
SELECT id, payer_email FROM paypal_ipn_orders WHERE payer_email IN ( SELECT payer_email FROM paypal_ipn_orders GROUP BY payer_email HAVING COUNT(id) > 1 ) sqlfiddle
NodeJS: How to remove duplicates from Array [duplicate]
No, there is no built in method in node.js, however there are plenty of ways to do this in javascript. All you have to do is look around, as this has already been answered. uniqueArray = myArray.filter(function(elem, pos) { return myArray.indexOf(elem) == pos; })
MySQL select rows that do not have matching column in other table
Typically, you would use NOT EXISTS for this type of query SELECT p.Name FROM pooltest p WHERE NOT EXISTS (SELECT s.Name FROM senttest s WHERE s.Name = p.Name) An alternative would be to use a LEFT OUTER JOIN and check for NULL SELECT p.Name FROM pooltest p LEFT OUTER JOIN senttest s ON s.Name = … Read more
Tree contains duplicate file entries
Method 1. Do the git fsck first. $ git fsck –full error in tree bb81a5af7e9203f36c3201f2736fca77ab7c8f29: contains duplicate file entries If this won’t fix the problem, you’re in trouble. You can either ignore the problem, restore the repository from the backup, or move the files into new repository. If you having trouble pushing the repo into … Read more
how to avoid duplicates in a has_many :through relationship?
Simpler solution that’s built into Rails: class Blog < ActiveRecord::Base has_many :blogs_readers, :dependent => :destroy has_many :readers, :through => :blogs_readers, :uniq => true end class Reader < ActiveRecord::Base has_many :blogs_readers, :dependent => :destroy has_many :blogs, :through => :blogs_readers, :uniq => true end class BlogsReaders < ActiveRecord::Base belongs_to :blog belongs_to :reader end Note adding the :uniq … Read more
duplicate symbols for architectures in Xcode
Check your import files, it may that you’re importing a .m file. #import “TimeModel.m”
How to check for duplicate CSS rules? [duplicate]
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 install css purge tool npm install css-purge -g After the tool is installed, Open the folder where node command prompt window is open and … Read more
Postgres: left join with order by and limit 1
Use a dependent subquery with max() function in a join condition. Something like in this example: SELECT * FROM companies c LEFT JOIN relationship r ON c.company_id = r.company_id AND r.”begin” = ( SELECT max(“begin”) FROM relationship r1 WHERE c.company_id = r1.company_id ) INNER JOIN addresses a ON a.address_id = r.address_id demo: http://sqlfiddle.com/#!15/f80c6/2