How would I go about implementing python's namedtuple in javascript? Ideally I would also want a function I could "map" over a sequence of sequences to turn it into a sequence of namedtuple-like objects.

// with underscore.js included...
var points = [[1,2], [3,4], [4,5]
var Point = namedlist('Point', 'x y')
points = _.map(Point._make, points)

point1 = points[0]
var x = point1.x
var y = point1.y

Note that I don't want to have to code a new class like "Point" every time, but instead would like a factory function that produces a new class supporting list item access with the given field names.

Side note: an assumption underlying this question is that javascript maps use less memory that lists. Is that assumption reasonable?

javascript python namedtuple
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