Except maybe toning down the exhortation to use other people's code so much. I totally agree that using existing solutions is very often the simplest solution; I would not want to rewrite PostgreSQL or any crypto libs. But too many dependencies can get messy; there is definitely a line at which writing your own code specifically for this situation is simpler and better than importing a more generic dependency that is much larger and more complex than it needs to be for your use case (because it covers more than just your use case). Or, (e.g. Left Pad), where the dependency is not actually easier than just writing the code yourself. Importing any dependency carries with it some complexity because it means integrating someone else's code into your own, with the ensuing security implications and version problems. It is not always more complex to write your own code.
My general rule of thumb is that if it'll be quicker for me to code a solution to this specific problem than it would be to learn the API for an import and integrate it, then I'll write the code myself.
Except maybe toning down the exhortation to use other people's code so much. I totally agree that using existing solutions is very often the simplest solution; I would not want to rewrite PostgreSQL or any crypto libs. But too many dependencies can get messy; there is definitely a line at which writing your own code specifically for this situation is simpler and better than importing a more generic dependency that is much larger and more complex than it needs to be for your use case (because it covers more than just your use case). Or, (e.g. Left Pad), where the dependency is not actually easier than just writing the code yourself. Importing any dependency carries with it some complexity because it means integrating someone else's code into your own, with the ensuing security implications and version problems. It is not always more complex to write your own code.
My general rule of thumb is that if it'll be quicker for me to code a solution to this specific problem than it would be to learn the API for an import and integrate it, then I'll write the code myself.