[JS] fCC's exercise Falsy bouncer: https://codepen.io/adrianskar/pen/MGRXKy

falsy_bouncer.js

// Falsy bouncer

function bouncer(arr) {
    return arr.filter(function(val) {
        return Boolean(val) !== false; // Same as: return (val);
    });
}


bouncer([7, "ate", "", false, null, 9, NaN]);

/* This does the trick too:
var newArr =[];
  for (var i = arr.length - 1; i >= 0; i--) {   
    switch(true){
      case !!arr[i]:
      newArr.push(arr[i]);
      break;
      default:
      break;
    }
  }
  return newArr.reverse();
  
  */