I mean, in an example where the problem and solution is well understood, sure, but like all things there are downsides and you need to consider appropriateness.
Firstly if you're conceiving a novel algorithm it can be tedious to debug/test if written in a functional style because it's hard to step through in the debugger.
Second, you need to be extremely familiar with the language and ensure that you know that you're not mixing and matching mutable and immutable system calls, which will be hell to debug, see 1.
I'm not anti-functional and sometimes it can yield really clean and easy to read code, but I have to recoil when I see praises sung without the criticism.
Firstly if you're conceiving a novel algorithm it can be tedious to debug/test if written in a functional style because it's hard to step through in the debugger.
Second, you need to be extremely familiar with the language and ensure that you know that you're not mixing and matching mutable and immutable system calls, which will be hell to debug, see 1.
I'm not anti-functional and sometimes it can yield really clean and easy to read code, but I have to recoil when I see praises sung without the criticism.