Underscore.js: how to chain custom functions

Question

Using Underscore.js, I can write the following which returns 42:

_([42, 43]).chain()
    .first()
    .value()

I have custom f

Answer 1

Using compose is another way dealing with the situation, but I think adding a function such as take as I suggested earlier is a better solution. Still, here is how the code would look like with compose:

function double(value) { return value * 2; };

_.compose(
    double,
    _.first,
    _.bind(_.identity, _, [42, 43])
)();

The initial value needs to be provided through a function which returns that value (here done by currying identity), and the functions need to be listed in an other which is the reverse of what you have with a chain, which appears as pretty unnatural to me.