`filter` should be extended with obj condition

[askucher]

filter works fine with functions but sometimes better to filter by object

o = [{ x: 1, y: 2}, { x: 2 }]
o |> filter { x: 1 }  

expected => [{ x: 1, y: 2}] actual thrown n is not a function

[gkz]

I think this is easy enough:

o = [{ x: 1, y: 2}, { x: 2 }, { x: 2, y: 3}]
o |> filter (.x == 1)
o |> filter (.x == 2 && it.y == 3)

[anko]

How to do it yourself if you want that API anyway:

compare = (template, actual) -->
  (for let key, value of template
    actual[key] is value)
    .every (is true)

o = [{ x: 1, y: 2}, { x: 2 }, { x: 2, y: 3}]

o.filter compare { x: 1 }
|> console.log # => [ { x: 1, y: 2 } ]

[askucher]

@gkz sometimes better build a condition as object. for instance for filtering the table