Idioms & SlangBeginner
Reinventing the wheel
Pronunciationree-in-VEN-ting the WEEL
Definition
Building something from scratch when a good solution already exists.
Where you hear it
Code reviews and technical decisions.
Examples
Don't reinvent the wheel. Use the existing library.
Writing our own date library is reinventing the wheel.
Common mistake
Using it to reject every custom solution. Sometimes security or licensing needs your own code.