function getRules(has) {
var getRule = function (x) { return x[1] }
var falseRule = function (x) { return has(x[0], false) }
var trueRule = fu.comp(fu.not, falseRule)
return fu.concat(
rules.builtin,
fu.map(getRule, fu.filter(falseRule, fu.intoArray(rules.aretrue))),
fu.map(getRule, fu.filter(trueRule, fu.intoArray(rules.arefalse)))
)
}
function getObjProperty(obj) {
return fu.head(fu.filter(function (x) {
return obj.hasOwnProperty(x)
}, ['or', 'maybe', 'type', 'fn']))
}
function getOtherNode(left, right) {
return fu.filter(function (node) {
return !isNaNIdentifier(node)
}, [left, right])
}