const data = ["hello", " ", "world", "!"];

var dep1 = { id: 0 };

var dep2 = { id: 1 };

var dep3 = { id: 2 };

var dep4 = { id: 3 };

var deps1 = [dep1];

var deps2 = [dep1, dep2];

var deps3 = [dep1, dep2, dep3];

var deps4 = [dep1, dep2, dep3, dep4];

​

function sample1(_0) {

  return _0;

}

​

function sample2(_0, _1) {

  return _0 + _1;

}

​

function sample3(_0, _1, _2) {

  return _0 + _1 + _2;

}

​

function sample4(_0, _1, _2, _3) {

  return _0 + _1 + _2 + _3;

}

​

var sampleApply1 = createApplyComputation(sample1, deps1);

var sampleApply2 = createApplyComputation(sample2, deps2);

var sampleApply3 = createApplyComputation(sample3, deps3);

var sampleApply4 = createApplyComputation(sample4, deps4);

var sampleSingle1 = createSingleComputation(sample1, dep1, true);

var sampleSingle2 = createSingleComputation(sample2, deps2);

var sampleSingle3 = createSingleComputation(sample3, deps3);

var sampleSingle4 = createSingleComputation(sample4, deps4);

var sampleDeopt1 = createDeoptComputation(sample1, deps1);

var sampleDeopt2 = createDeoptComputation(sample2, deps2);

var sampleDeopt3 = createDeoptComputation(sample3, deps3);

var sampleDeopt4 = createDeoptComputation(sample4, deps4);

​

function createDeoptComputation(fn, deps) {

  return () => fn(...deps.map(read));

}

​

function createApplyComputation(fn, deps) {

  switch (deps.length) {

    case 1:

      return () => fn(read(deps[0]));

    case 2:

      return () => fn(read(deps[0]), read(deps[1]));

    case 3:

      return () => fn(read(deps[0]), read(deps[1]), read(deps[2]));

    default:

      return () => fn(...deps.map(read));

  }

}

​

function createSingleComputation(fn, deps, isSingle) {

  if (isSingle) {

    return () => fn(read(deps));

  } else {

    return () => fn(...deps.map(read));

  }

}

​

function read(s) {

  return data[s.id];

}