composition.js

import _ from 'underscore';

let toNumbers = function(arr) {
  return _.map(arr, _.partial(parseInt, _, 10));
}

let execFuncs = function(arr) {
  return _.map(arr, function(item) {
    return _.isFunction(item) ? item() : item;
  })
}

var arr = [
  false,
  16,
  1,
  "jens",
  function() {
    return 2 * 5;
  },
  17,
  16,
  ["2", 3, "four", 5, 6, [90, [[100]]]]
];

var funkyTown = _.compose(
  _.sortBy, // Sort
  _.compact, // remove false values
  toNumbers, // Convert strings to numbers
  execFuncs, // Get result of nested functions
  _.flatten // un-nest arrays
);

console.log( funkyTown( arr ) );

// Result => 
// [1, 2, 3, 5, 6, 10, 16, 16, 17, 90, 100]