Elixir Featured How to create the content hash for a Dropbox file upload in Elixir Calculate the content hash of a file being uploaded to Dropbox in Elixir in as little as five lines of code!
MongoDB How to set up MongoDB on macOS using brew The community edition of MongoDB can be set up on macOS using brew by following four simple steps.
MongoDB How to perform a JOIN in MongoDB If you have relational data in your MongoDB instance, you can perform an operation similar to a JOIN typically done in SQL queries.
MongoDB When to use MongoDB aggregations instead of queries When it comes to reading data out of your MongoDB instance you have two options, a query using the standard query language or an aggregation pipeline. While you can often use either for many use cases, there are differences in how they are used and what use cases they are a good fit for.
Bash How to do conditional execution in Bash In Bash scripts, any command following a && will only execute if the previous conditional or command succeeded (returned 0)
Bash How to check if a string is empty in Bash To check if a string is empty in a Bash script, use the -z conditional which returns 0 (true) if the length of the string is 0 and 1 (false) if it is greater than 0. myVar="hello" if [[ -z "$myVar" ]]; then echo "myVar is empty" else echo "myVar is
MongoDB Use the filter positional operator in MongoDB to update specific array elements For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. -------------------------------------------------------------------------------- MongoDB provides a filter positional operator $[] to only update some elements in an array. If you want to update all the elements in the array, use the all positional
MongoDB Use the all positional operator in MongoDB to update all elements in an array For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. MongoDB provides a special update operator $[] to apply an update operation to all elements in an array belonging to matching documents. With the following data inserted into a collection called
MongoDB This is how to do upserting in MongoDB Upserting is a database concept that combines inserting and updating that MongoDB supports
FFmpeg How to replicate the output of the FullScreen template from StreamLadder StreamLadder [https://streamladder.com] is a nifty little tool for creating vertical versions of your Twitch clips for platforms like Tiktok and YouTube Shorts. However, I like tinkering with FFmpeg [https://donaldfeury.xyz/tag/ffmpeg] so I replicated the output with a simple command. If we look at the Fullscreen
MongoDB How to do bulk updates in MongoDB Bulk updating in MongoDB can be done using the update and updateMany methods.
MongoDB How to drop a collection from MongoDB If you want to completely drop a collection, which will result in the loss of all documents in that collection, there is one simple command to do that called drop.
MongoDB How to replace an existing document in MongoDB MongoDB provides several ways to update specifically one document that works great when doing partial updates. If you want to completely replace an existing document with a new one, you can use replaceOne.
MongoDB How to update a single document in a MongoDB collection You can update existing documents in MongoDB and if you want to update only one document at a time you have three main options. You can use the update method to update one document. By default, it will only update one document, even if the query provided matches multiple documents.
MongoDB How to create a collection in MongoDB For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. If you want to explicitly create a new collection in MongoDB rather than letting it be automatically created when an insert operation happens, you can do so using the createCollection
MongoDB How to find all the distinct values of a field across your documents in MongoDB using the distinct aggregation method If you want to find out all the different values for a field across all the documents in a collection, you can use the ready-made distinct aggregation method to find that out.
MongoDB How to bulk insert documents into a MongoDB collection For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. Not only can you insert a single document into a collection [https://donaldfeury.xyz/how-to-insert-a-single-document-into-a-mongodb-collection/] with the insert method, it can also take in an array of documents for bulk
MongoDB How to insert a single document into a MongoDB collection For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. MongoDB has several ways of inserting documents into collections. The main way is using a method on collections called insert. Here is an example: // Let's say we want to insert
MongoDB How to count the number of documents in a MongoDB collection or query For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. MongoDB has a few ready-made aggregations available as methods and one of those is count. It can be used to determine how many documents are in a collection or returned
MongoDB How to sort the results of a MongoDB query For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. After using the find method to get retrieve some documents from MongoDB [https://donaldfeury.xyz/get-all-the-documents-out-of-a-collection-in-mongodb/] and further trimming down that result using filters [https://donaldfeury.xyz/how-to-retrieve-specific-documents-from-mongodb-using-filters/] , there may
MongoDB Use the limit method to retrieve a specific number of documents from MongoDB For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. While you can use the find method to read data back out of MongoDB [https://donaldfeury.xyz/get-all-the-documents-out-of-a-collection-in-mongodb/] and the findOne method is a MongoDB query to pull specifically one
MongoDB How to retrieve specific documents from MongoDB using filters For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. While you can use the find method to read multiple documents out of MongoDB [https://donaldfeury.xyz/get-all-the-documents-out-of-a-collection-in-mongodb/], it is more likely you only want a subset of that data.
MongoDB How to retrieve only one document from a MongoDB collection For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. MongoDB has a convenient method called findOne which is very similar to the find method, except it, returns the actual document instead of a cursor and it will only return
MongoDB Get all the documents out of a collection in MongoDB For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. The most simple way to read all the documents out of a collection in MongoDB is to use the find method on a collection. Let's say you have a collection
MongoDB Setting up MongoDB on Windows For a full overview of MongoDB and all my posts on it, check out my overview [https://donaldfeury.xyz/introduction-to-mongodb/]. MongoDB can be quickly and easily set up on Windows using the default MSI installation wizard provided by the MongoDB team. To get the installer, follow these steps: * Go to
