Polyfilling declarative-style name binding for js

where.js

//first draft
var where = where_fn => where_fn ()

where ((
	even = n =>
		!! (n === 0)
		? true
		: odd (n - 1),
	odd = n =>
		!! (n === 0)
		? false
		: even (n - 1) ) =>
console .log (n - 1) )

//various experiments
var given = given_form => given_form ()

given (
	(odd, even) => ($=>
console .log (even (10))
) (
	odd = n =>
		!! (n === 0)
		? false
		: even (n - 1),
	even = n =>
		!! (n === 0)
		? true
		: odd (n - 1) ) )


//current draft

//TODO: look for where and take in fn_form instead
var so = fn_form => 
	!! (fn_form .toString () .endsWith ('=>_'))
	? fn_form () ()
	: fn_form ()


so ((_=_=>
console .log (even (121)),
where
, odd = n =>
	!! (n === 0)
	? false
	: even (n - 1)
, even = n =>
	!! (n === 0)
	? true
	: odd (n - 1) )=>_)


so ((
take
, odd = n =>
	!! (n === 0)
	? false
	: even (n - 1)
, even = n =>
	!! (n === 0)
	? true
	: odd (n - 1) )=>
console .log (even (120)) )

Actually wheres can also support arbitrary orders within the where clauses. simply recall the function, supplying appropriate parameters to suppress values not yet obtained, and repeat until all values are obtained.