In memory storage

• What is a ‘call’?

function invocation.

 

• How many ‘calls’ can happen at once?

one, since the javascript engine is single-threaded.

 

• What does LIFO mean?

Last In, First Out (LIFO), which temporarily stores and manages function invocation (call), and solves the last function that was called .

 

• Draw an example of a call stack and the functions that would need to be invoked to generate that call stack.

to get this error in console

will look like this

function firstFunction(){
  throw new Error('Stack Trace Error');
}

function secondFunction(){
  firstFunction();
}

function thirdFunction(){
  secondFunction();
}

thirdFunction();

 

• What causes a Stack Overflow?

a function that calls itself without an exit point.

 

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• What is a ‘reference error’?

It’s when you try to reference something that wasn’t declared yet.

 

• What is a ‘syntax error’?

this occurs when you have something that cannot be parsed in terms of syntax, like when you try to parse an invalid object using JSON.parse.

 

• What is a ‘range error’?

Try to manipulate an object with some kind of length and give it an invalid length and this kind of errors will show up.

 

• What is a ‘type error’?

this types of errors show up when the types (number, string and so on) you are trying to use or access are incompatible, like accessing a property in an undefined type of variable.

 

• What is a breakpoint?

It’s where the code will stop when you are debugging it.

 

• What does the word ‘debugger’ do in your code?

add a breakpoint.

 

301	Home
read01	Introduction to React and Components
read02	State and Props
read03	Passing Functions as Props
read04	React and Forms
read05	Putting it all together
read06	NODE.JS
read07	REST
read08	APIs
read09	FUNCTIONAL PROGRAMMING
read10	In memory storage
read11	Authentication
read12	Mongo and Mongoose
read13	CRUD
read14	Project Ideas
read15	Project Kickoff