Blakes Seven questions

Blakes Seven answers

• Filter Documents by Distance Stored in Document with $near
• how does $let access variables defined outside its expression in mongoDB?
• Matching EmbeddedDocument in EmbeddedDocumentList
• pre-allocation of records using count
• Positonal updates in MongoDB
• Retrieve the position in Array in mongodb
• MongoDB nested query using aggregate function
• Mongoose: Push or replace element into array
• MongoDB: Counting how many of each distinct values there are?
• MongoDB: Why $literal required ? And where it can be used?