rob-murray

columns_that_make_record_distinct = [:some_id, :another_name]

duplicate_records = Model.where.not(id: Model.select("MIN(id) as id").group(columns_that_make_record_distinct))

hectoregm

Regular Expressions: The Good Parts (Ruby Edition)

Introduction

So what are regular expressions?, Wikipedia has a nice [definition][1]:

Regular expressions provides a concise and flexible means for "matching" (specifying and recognizing) strings of text, such as particular characters, words, or patterns of characters. Abbreviations for "regular expression" include "regex" and "regexp".