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MongoDB: add/update fields referencing other existing fields using aggregation pipelines

9. April 2022 by tsmx-dev

Short explanation on how to add or update fields in documents referencing the values of other already existing fields by leveraging the aggregation pipeline framework.

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Categories MongoDB Tags JavaScript, MongoDB

Connecting from a Docker container to a local MongoDB

17. March 202214. January 2022 by tsmx-dev

A quick guide demonstrating how to connect to a local MongoDB instance from a Docker container.

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Categories Development Tags Docker, MongoDB, networking

Full code-coverage with Jest

10. January 20223. January 2022 by tsmx-dev

A guided tour on how to achieve the most complete code-coverage with Jest in your NodeJS projects and an some thoughts on why this is not necessarily the primary target.

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Categories NodeJS Tags Jest, NodeJS, testing

Creating a time series sample CSV file with a bash script

1. December 202126. November 2021 by tsmx-dev

Demonstrating a pragmatic way for generating time series sample data in CSV files with a bash script. Useful for Proof-of-Concepts, unit and performance testing and many other scenarios.

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Categories Development Tags bash, sample data, scripting, testing, time series

npm major package upgrades with backward patch support

20. October 20213. October 2021 by tsmx-dev

A short checklist for publishing new major versions of your packages in the npm registry including support for patching older versions.

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Categories Development, NodeJS Tags major-version, NodeJS, npm, package, patch, publish, update

Testing process.exit with Jest in NodeJS

27. September 202117. September 2021 by tsmx-dev

Demonstrating a pragmatic way on how to test code paths resulting in process.exit using the Jest test library.

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Categories NodeJS Tags JavaScript, Jest, NodeJS, testing

Commander options hands-on – advanced CLI’s with NodeJS

27. September 202111. September 2021 by tsmx-dev

The Commander package is a great utility for building a CLI with NodeJS. This article provides a comprehensive hands-on for the various option features of Commander.

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Categories NodeJS Tags CLI, Commander, NodeJS, option

JavaScript Map: sorted for-loop with a custom iterator

20. August 20211. June 2021 by tsmx-dev

An elegant way of how to do a sorted iteration over all entries of a JavaScript Map with a for-loop using a custom iterator implemented with Symbol.iterator, function* and yield*.

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Categories Development, NodeJS Tags for-loop, function*, iterate, JavaScript, Map, NodeJS, sort, Symbol.iterator, yield, yield*

Express: middleware function with custom parameters

16. May 202126. March 2021 by tsmx-dev

Implementing an Express middleware function that can handle custom parameters.

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Categories NodeJS Tags Express, NodeJS

nginx as development proxy to avoid CORS errors

24. September 202125. March 2021 by tsmx-dev

A simple setup for using nginx to avoid CORS errors during local development without the need of code changes.

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Categories Development Tags client-side, CORS, cross-origin, error, nginx, proxy, web-development
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Recent Posts

  • MongoDB: add/update fields referencing other existing fields using aggregation pipelines
  • Connecting from a Docker container to a local MongoDB
  • Full code-coverage with Jest
  • Creating a time series sample CSV file with a bash script
  • npm major package upgrades with backward patch support

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