How to use

spread

function

in

LoDashStatic

function* explainInvalid(values, predicates, via) {
  if (values.length !== predicates.length) return;

  const pairs = _.zip(predicates, values);
  const isInvalid = _.negate(_.spread(isValid));
  const index = _.findIndex(pairs, isInvalid);
  if (index !== -1) {
    const [spec, val] = pairs[index];
    yield* firstProblem(spec, val, {path: [index], via, _in: [index]});
  }
}

function tuple(...predicates) {
  return {
    conform: values => (values.length === predicates.length &&
              _.every(_.zip(predicates, values), _.spread(isValid))) ? values : invalidString,
    unform: _.identity,
    gen: () => tcg.array(_.map(predicates, gen)),
    describe: () => [tuple.name, ...describe(predicates)],
    explain: function*(values, {via}) {
      yield* explainPredicate(values, predicates, {via});
      yield* explainInvalid(values, predicates, via);
    }
  };
}