Let's say Java, Kotlin, JavaScript as my standard of know. Then C#, PHP as I knew but would need couple of weeks to refresh if I was to start a new project. Then Groovy, TypeScript as in used it but didn't really see to much difference from the others. Python and Go used it but never actually did a bigger project. Then C++ as in learned long time ago and could re-learn.
So if you exclude C++ I would say know as in could build a project decently would be 9. If you include C++ because I could re-learn stuff then throw in Scala as well and you have 11.
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Let's say Java, Kotlin, JavaScript as my standard of know. Then C#, PHP as I knew but would need couple of weeks to refresh if I was to start a new project. Then Groovy, TypeScript as in used it but didn't really see to much difference from the others. Python and Go used it but never actually did a bigger project. Then C++ as in learned long time ago and could re-learn.
So if you exclude C++ I would say know as in could build a project decently would be 9. If you include C++ because I could re-learn stuff then throw in Scala as well and you have 11.