as_atom
Convert a value to an Erlang atom.
default
Provide an alternative value in case a value has a falsy value (0, false , undefined or empty string).
if
Selects an argument depending on a condition.
if_undefined
Tests whether a value is undefined, returning the given argument.
is_defined
Tests if a value is defined.
is_undefined
Tests if a value is undefined.
make_value
pprint
Pretty print a zotonic value in a template.
to_binary
Convert the input to a binary value.
to_integer
Convert the input to an integer value.
to_json
Display any value as in JSON (JavaScript Object Notation).

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