xlembouras questions

xlembouras answers

• Why does MongoDB's "$and" operator sometimes use a different plan vs. specifying the criteria inline?
• how to pluck email from array of users
• can't dump anonymous class #<Module -error on caching in rails 3
• How to convert ruby formatted json string to json hash in ruby?
• how to define a compound and hashed mongodb index?
• Is it possible to do a before_action in Ruby (like in Rails)?
• Comparing two items in array with Ruby
• Find first n elements from array that match a condition
• How to properly index fields on a Rails join table migration?
• MongoID Data Type for TEXT