elliotkim916

function shouter(whatToShout) {
  return `${whatToShout.toUpperCase()}!!!`;
}


/* From here down, you are not expected to 
   understand.... for now :)  
   
   
   Nothing to see here!

elliotkim916

function computeArea(width, height) {
  return width * height;
}


/* From here down, you are not expected to 
   understand.... for now :)  
   
   
   Nothing to see here!

elliotkim916

function main() {
  try {
    doAllTheThings();
  }
  catch(e) {
    console.error(e);
    reportError(e);
}
}

elliotkim916

function accessFirstItem(array) {
  return array[0];
}

function accessThirdItem(array) {
  return array[2];
}

elliotkim916

function firstFourItems(array) {
  return array.slice(0, 4);
}

function lastThreeItems(array) {
  return array.slice(-3);
}

elliotkim916

Variable scope can be defined as how the variables you declare either can or cannot be accessed at different points in your code.  
With global scope, any variable that is declared outside of a Javascript function has global scope.  
Inside Javascript functions are local scopes and with the scope chain, Javascript follows the scope chain to determine the value of the variable.

Global variables are avoided because they tend to make unintended side effects more likely.  
Also, global variable along with unintended side effects almost guarantee that the code becomes indeterminate, meaning
given a single set of inputs, returns one value sometimes and another at other times.

Whenever Javascript's strict mode is enabled, anytime a variable is declared without const or let, an error will be triggered.

elliotkim916

function keyDeleter(obj) {

  delete obj.foo;
  delete obj.bar;
  return obj;
}


var sampleObj = {
  foo: 'foo',

elliotkim916

function fizzBuzz(countTo) {
  // your code here
  var values = [];
  for (var i = 1; i <= countTo; i++) {
    if (i % 5 === 0 && i % 3 === 0) {
      values.push('fizzbuzz');
    }
    else if (i % 5 === 0) {
      values.push('buzz');
    }

elliotkim916

const studentData = [
  {
    name: 'Tim',
    status: 'Current student',
    course: 'Biology'
  },
  {
    name: 'Sue',
    status: 'Withdrawn',
    course: 'Mathematics'

elliotkim916

function getTokens(rawString) {
  // NB: `.filter(Boolean)` removes any falsy items from an array
  return rawString.toLowerCase().split(/[ ,!.";:-]+/).filter(Boolean).sort();
}

The getTokens function is a regular expression which is a sequence of characters that forms a search pattern.  
The lower case method will return all the words in text in lower case form.
The regular expression is being used to search for all the punctuation marks in text such as [,!.";:-]+ and 
is then using the split method to split the array into an array of substrings, returning a new array. 
As noted above, the .filter(Boolean) is being used to remove any falsy items from an array.