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The Clojure world has a set single-letter naming conventions that, since they are widely accepted, greatly improve readability. If you see an argument named `f`, you can be sure it is a function. `m` is a map, while `k` and `v` are used for keys and values, respectively. `x` and `y` are numbers and `n` is always an integer.

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I bet the scope of such names is pretty narrow, no more than 3-4 lines? The narrower the scope, the less descriptive your names may be, and such math-like conventions make sense.

In a 50-line function (which you should avoid but sometimes can't because of long lines wrapped for readability), using a name like `f` throughout is a harder sell.

I prefer a convention of semantically relevant variable names prefixed/suffixed by a letter indicating type.

Didn't we already collectively decide that Hungarian notation is a bad idea? About 20 years ago?

No. It's alive and particularly pragmatic in dynamic languages. The type of sigil, @ or $ or I or Array(space) are all equal to the interpreter. The difference is how offended you might be that type annotations are semantically identical.

To be clear, the above examples are used when the function is designed to accept any such argument and only relevant info is the type.

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