JAVASCRIPT self study - EDUTRUL

anom_function_map.js

var passengers = [ 
  ["Thomas", "Meeks"],
  ["Gregg", "Pollack"],
  ["Christine", "Wong"],
  ["Dan", "McGaw"] 
];

var modifiedNames = passengers.map(function (arrayCell) {
  return arrayCell[0] + ' ' + arrayCell[1];
});
console.log(modifiedNames);
// OUtput: ["Thomas Meeks", "Gregg Pollack", "Christine Wong", "Dan McGaw"]

closure_a.js

function warningMaker(obstacle) {
  var count = 0;
  var zones = [];
  return function(number, location) {
    count++;
    var list = "";
    // add each location to the zones array
    zones.push(location);
    // add each zone to the list string
    list = zones.join("\n");
    alert("Beware! There have been " + obstacle +
          " sightings in the Cove today!\n" +
          number + " have been spotted at the " +
          location + "!\n" +
          "This is alert #" + count +
          " today for " + obstacle + " danger.\n" + "CUrrent danger zones are:" + "\n" + list);
  };
}
print = warningMaker("hey");
print(3, "Peru");
print(5, "Arg");

function_anom_execute_array.js

var puzzlers = [
  function(a) { return 8 * a - 10; },
  function(a) { return (a - 3) * (a - 3) * (a - 3); },
  function(a) { return a * a + 4; },
  function(a) { return a % 5; }
];
var start = 2;

var applyAndEmpty = function(input, queue) {
  var length = queue.length;
  for (var i = 0; i < length; i++) {
    input = queue.shift()(input);
  }
  return input;
};

alert(applyAndEmpty(start, puzzlers));

returning_anom_function.js

function adventureSelector(userChoice) {
  // return anonymous functions inside conditional blocks
  switch (userChoice) {
    case 1:
      return function () { alert("You selected the Vines of Doom!"); };
    case 2:
      return function () { alert("You selected the Vines of Doom!"); };
    case 3:
      return function () { alert("The Caves of Catastrophe!"); };
  }
}
adventureSelector(1)();
// Outputs: You selected the Vines of Doom!