duplicates

Given the following models: class Blog(models.Model): name = models.CharField() class Entry(models.Model): blog = models.ForeignKey(Blog) content = models.CharField() I am looking to pass the following to a template: blogs = Blog.objects.filter(entry__content__contains = 'foo') result = [(blog, blog.entry_set.filter(content__contains = 'foo')) for blog in blogs] render_to_response('my.tmpl', {'result': result} However, "Blog.objects.filter(...)" returns the same Blog object multiple times if more than one matching entry is found. How do you remove the duplicates? Or better yet, am I missing a

I have a character vector, including some elements that are duplicates e.g. v <- c("d09", "d11", "d13", "d01", "d02", "d10", "d13") And another vector that includes single counts of those characters e.g. x <- c("d10", "d11", "d13") I want to remove only the first occurrence of each element in x from the 2nd vector v . In this example, d13 occurs in x and twice in v , but only the first match is removed from v and the duplicate is kept. Thus, I want to end up with: "d09", "d01", "d02", "d13" I've been trying various things e.g. z <- v[!(v %in% x)] but it keeps removing all instances of the

I'm trying to come up with a method of finding duplicate addresses, based on a similarity score. Consider these duplicate addresses: addr_1 = '# 3 FAIRMONT LINK SOUTH' addr_2 = '3 FAIRMONT LINK S' addr_3 = '5703 - 48TH AVE' adrr_4 = '5703- 48 AVENUE' I'm planning on applying some string transformation to make long words abbreviated, like NORTH -> N, remove all spaces, commas and dashes and pound symbols. Now, having this output, how can I compare addr_3 with the rest of addresses and detect similar? What percentage of similarity would be safe? Could you provide a simple python code for this?

This code removes duplicates from the original list, but I want to extract the duplicates from the original list -> not removing them (this package name is just part of another project): Given: a Person pojo: package at.mavila.learn.kafka.kafkaexercises; import org.apache.commons.lang3.builder.ToStringBuilder; public class Person { private final Long id; private final String firstName; private final String secondName; private Person(final Builder builder) { this.id = builder.id; this.firstName = builder.firstName; this.secondName = builder.secondName; } public Long getId() { return id; }

Query SELECT COUNT(*), name, number FROM tbl GROUP BY name, number HAVING COUNT(*) > 1 It sometimes fails to find duplicates between lower case and upper case. E.g.: sunny and Sunny don't show up as a duplicates. So how to find all possible duplicates in PostgreSQL for two columns. Erwin Brandstetter lower() / upper() Use one of these to fold characters to either lower or upper case. Special characters are not affected: SELECT count(*), lower(name), number FROM tbl GROUP BY lower(name), number HAVING count(*) > 1; unaccent() If you actually want to ignore diacritic signs, like your comments