Answer the following questions:
- What does the
throwkeyword do? - What does the
finallykeyword do? - What is the difference between a
TypeErrorandReferenceError? - How do you create a snippet in the Chrome dev tools?
- In the Chrome dev tools, on the right hand side of the sources tab, there is a “pause” button which allows you to “pause on caught exceptions.” What is an
exception? - How do we “catch” errors in JavaScript? Give an example with code for what that might look like.
Explain what type of error will be thrown, why the error is occuring, and how to fix it:
1.
person;2.
let data = {};
data.displayInfo();3.
let data = {};
data.displayInfo.foo = "bar";4.
function data(){
let thing = "foo";
}
data();
thing;Part II
Fix the broken code and explain what was wrong:
1.
for(let i=0; i > 5; i++){
console.log(i);
}2.
function addIfEven(num){
if(num % 2 = 0){
return num + 5;
}
return num;
}3.
function loopToFive(){
for(let i=0, i < 5, i++){
console.log(i);
}
}4.
function displayEvenNumbers(){
let numbers = [1,2,3,4,5,6,7,8];
let evenNumbers = [];
for(let i=0; i<numbers.length-1; i++;){
if(numbers % 2 = 0); {
evenNumbers.push(i);
}
return evenNumbers;
}
}
displayEvenNumbers(); // should return [2,4,6,8]
// HINT - eight things need to be changed here for this to work!
// Start by fixing the syntax errors and then run the function to see what your output is.Solutions
You can find solutions to the exercises here
When you’re ready, move on to Nested Objects
