That you must know as many programming languages and frameworks. One year into my professional journey my top key takeaway has been that design patterns and paradigms are the most important thing. All code is the same as long as you know the fundamentals of programming, can read docs and be willing to spend your day 'crying' while searching error messages on Google. I was convinced that language/framework A is the best tool and you can't achieve this on language/framework B. Today I'm open minded about the best tool for the job and also being in a software development agency start up for 6 months, I have been forced to get out of my shell and work with tech I once considered unworthy or languages I thought I'd never work with professionally .
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