@foreach returning "TypeError: undefined is not a function"

[DakuTree]

Have had trouble trying to get @foreach to work. Nearly every variation I try seems to return the error.

From what I can tell, this seems to be caused by @foreach assuming the array/object has been stringified before being passed to it. If a array/object is passed normally, it fails when trying to do a .match().
The README makes no mention that this needs to be done beforehand either...

Example:

var pp = require('preprocess'),
    input = "<!-- @foreach $ITEM in LIST -->$ITEM<!-- @endfor -->";

pp.preprocess(input, {LIST: ['a', 'b', 'c'].toString()}); //returns abc

pp.preprocess(input, {LIST: ['a', 'b', 'c']}); //returns error || TypeError: undefined is not a function

[orionstein]

This is more if an issue with the way preprocess handles variables.

Preprocess was designed to work with environment variables - every value is assumed to be a string. It does not handle raw JS data types currently, as you could not store one in an environment variable - you would need to store the stringified version to reference.

This could be fixed, but would need to think how it fits in with the rest of the intended function.