Loading a file and executing it

[jay vas]

Hi guys : Making some progress w/ clojure. Ran into a wall though :

user=> (load-file "/Users/Jay/Documents/workspace/ClojureApps/src/test/Example1.clj") 
"Hello ! "
user=> 
user=> hello "SDF"
CompilerException java.lang.Exception: Unable to resolve symbol: hello in this context, compiling:(NO_SOURCE_PATH:0) 
"SDF"

I'm trying to simply (1) load a file, and then (2) execute a method in that file. However, the method is not seen ?

So I have two questions

1) How can I know what methods have been loaded and defined by my file ?

and

2) How can I execute the hello() function in the aforementioned script from REPL ?

and finally,

3) This is unrelated, but.... What is the "#" in the '#"\W+"' function (see below) doing ? I always assumed that # sign's were for anonymous functions, but #"\W+" seems more like a regex, i.e. it shouldnt need a pound before it ?

(filter #(> (count %) 2) (re-split #"\W+" "A day"))


Thanks ..........

[Sean Corfield]

If you're using a namespace in your Example1.clj, you'll need to switch to that namespace in the REPL in order to access those functions - or qualify them with the namespace you just loaded. Something like:

(test.Example1/hello "SDF")

assuming the namespace matches your file path name, or:

(ns test.Example1)
(hello "SDF")

To get a list of public vars in a namespace, use:

(ns-publics 'user)
(ns-publics 'test.Example1)

That will show everything in the user namespace (where the REPL is by default) and everything in your test.Example1 namespace. (vals (ns-publics ...)) might prove easier to read.

# identifies a "reader macro" called dispatch and there are several forms, including #(anonymous function), #"regex", #{a set} - see http://clojure.org/reader for more detail.

[Hussein Baghdadi]

On a side note, just keep in mind to use list syntax to call functions in Clojure.
(func param) not func param