The king is back :d.

#Day2 from #100DaysOfCode. Today's goal.Finish Deep Dive JS - From Frontend Masters. #javascript #dailyJS.

#Day1 from #100DaysOfCode. Today's goal.Finish Scope&Closure - From Frontend Masters. #javascript #dailyJS.

@DmitrySoshnikov BTW I know we can use Symbol as object like this. var sym = Symbol('foo');.var symObj = Object(sym);.

Hey @DmitrySoshnikov .When I learn about Symbols many resource say "We can't use Symbol function as a constructor". But anyone don't say this reason. Also we can use symbol's wrapper object? (symbol.toString). What do U think why ES team not add this feature?.

@DmitrySoshnikov I hope you understand my question. I know how we found this value but my question is how JS engine found this value.

Function this (ake Context) bound when function call and we can know context value from call site 4 type (Implicit, Explicit, New, Default).But I can't found JS where get "this" value in Specification. For example JS also look object before dot (obj.test()) @DmitrySoshnikov.

If you have Obsessive Compulsive disorder you read Ecma Specification and Ecma Specification have many link another chapters :( .#100DaysOfCode #javascript #OCD #programmer

RT @YDKJS: Ways to donate to help support me:. * * * Hopefully o….

Let's challenge If someones also join me it will be motivational. I share my current Frontend Masters path and after 30 day share path status. Let's look how I improved myself. Note: I do this every month. @FrontendMasters #100DaysOfCode #codenewbies #typescript #learntocode

My question wait Your response Sir :) @getify.

@willsentance @getify For example @willsentance talk about creation EC and Scope Chain but not talk about engines and compilers. When @getify come and say "scope create compile time" My mind say "Okay What happened EC's creation phase and execution phase?".

When I watch @willsentance course (The Hard Parts) on Frontend Masters after this I read @getify book (You Don't Know JS) currently I can't combinatie two resource in my mind.

@getify @rauschma My related "stack overflow" question.

@getify @rauschma What do you think about this quote? Is this true? Actually, my question is who declare variable engine or compiler?.

Hello @a_zlatkov I read your blog and think your blog has an issue or I didn't know right. You say event loop and callback queue is not part of the engine are you sure or I did not understand correctly?.

Thank @willsentance for The Hard Parts course in @FrontendMasters. This is awesome. But I have a question about the course content. Are Variable Environment and Lexical Environment same things? if not same thing why @willsentance don't talk about this.

@getify @getify Can you explain this for me?.

When I read YDKJS book in there @getify says "First, Compiler declares a variable (if not previously declared in the current scope)" - but I don't understand how compiler declare a variable?.Isn't his job just to do turn code to machine code?.