What's the usual naming rule in clojure?

Question

As i see, clojure has more characters for variable name than c/c++/java. For example:

Functions end with '?' usually return a Boolean, they are predicate.

There are also variables starting with '-', or ending with '!'.

i think these are all clojure-style naming. So, what's the usual naming rule in clojure? is there something in common for clojure programmers?

Answer 1

It's worth looking at Clojure's Library Coding Standards which I think are still probably the best reference on Clojure coding style.

The main function naming conventions seem to be:

• Use lowercase function names: frobnicate
• Multiple word names use hyphens as separators: frobnicate-with-extra-fizz
• Use namespaces to allow you to re-use good names if needed: my.special.collection/concat
• Use ? to indicate a predicate that returns true or false: sequential?
• Use ! to indicate a function with side effects that is not transaction safe, e.g.: set!

For local variables the following are common:

• f, g, h - functions
• n - integer representing a size or count
• index, i - integer index
• x, y - numbers
• s - string input
• coll - a collection
• pred - a predicate closure
• & more - variadic input

Answer 2

Clojure is a dialect of Lisp, so Lisp convention may apply: http://www.cliki.net/naming%20conventions