javascript - Map object keys to array is value is true -

javascript - Map object keys to array is value is true -

i have object pks , extract keys value true

pks = {3: false, 7: true, 2: true}

is there underscore function can homecoming [7, 2]? i've tried _.invert lost 1 of values in process i'm looking alternative

you can builtin functions, no need underscore:

object.keys(pks) .filter(function(k){return pks[k]}) .map(number)

javascript underscore.js