if you can program in one you can probably get by in another quite easily
Yes and no. That holds true within families - if you know an imperative language, you can pick up any other imperative language easily enough, it's just different keywords and syntax for the same thing. But if you learn a different kind of language - e.g. functional, then you first have to learn a new way to think, and that's where the value is.
As an example, f you want to, you can easily treat Python as a sort of super-shell-script. So it's easy to get into, but most of its power will be wasted. To get the most out of it, you have to learn to think "Pythonically" and that takes time and experience using it to solve real problems, and constant rewriting until you "get it".
Yes and no. That holds true within families - if you know an imperative language, you can pick up any other imperative language easily enough, it's just different keywords and syntax for the same thing. But if you learn a different kind of language - e.g. functional, then you first have to learn a new way to think, and that's where the value is.
As an example, f you want to, you can easily treat Python as a sort of super-shell-script. So it's easy to get into, but most of its power will be wasted. To get the most out of it, you have to learn to think "Pythonically" and that takes time and experience using it to solve real problems, and constant rewriting until you "get it".