The benefit of ES5 web browser APIs with callbacks is that it's super explicit once we understand how it works under the hood. by @willsentance @FrontendMasters #javasript #javascriptTheHardParts #100DaysOfCode #developer_tips

The problem with ES5 web browser APIs with callback functions is that our response data is only available in the callback function - callback hell. by @willsentance @FrontendMasters #javascript #javascriptTheHardParts #100DaysOfCode #developer_tips

Features 'web browsers' have that JavaScript does not have. - Dev-tools - Console - sockets - network request - HTML DOM - Timer by @willsentance @FrontendMasters #javascript #javascriptTheHardParts #100DaysOfCode #developer_tips

The notion of memorization is giving our functions persistent memories of their previous input output combinations. by @willsentance @FrontendMasters #javascriptTheHardParts #javascript #100DaysOfCode #developer_tips

Closures gives our functions persistent memories and entirely new toolkit for writing professional code. by @willsentance @FrontendMasters #javascriptTheHardParts #javascript #100DaysOfCode #developer_tips

Memorization is still a go to practice for optimizing how we write our code, how performance it is. by @willsentance @FrontendMasters #javascriptTheHardParts #javascript #100DaysOfCode #developer_tips

Pair programming is the most effective way to grow as a software engineer. In pair programming, we are forced to verbalize and explain our code and therefore not just make them work alone. by @willsentance @FrontendMasters #javascriptTheHardParts #100DaysOfCode #javascript

callbacks are a core aspect of async #javascript and are under the hood of promises, async/await by @willsentance @FrontendMasters #javascriptTheHardParts #100DaysOfCode #developer_tips

Map, Filter, Reduce - the most readable way to write code to work with data in #javascript by @willsentance @FrontendMasters #javascriptTheHardParts #100DaysOfCode #developer_tips

In #javascript, functions are what's called 'first class objects.' That's to say, they have everything that objects have. They have full features of object. by @willsentance @FrontendMasters #javascriptTheHardParts #100DaysOfCode #developer_tips

The idea of 'high order function' is not deciding exactly what some of our functionality is, until we run our function. by @willsentance @FrontendMasters #javascriptTheHardParts #100DaysOfCode #developers_tips #javascript

The core premise of FUNCTION is making code that we can write once and then reuse again and again with different values, different data. by @willsentance @FrontendMasters #javascriptTheHardParts #100DaysOfCode #developer_tips #javascript

Three components of #javascript a. Memory b. Thread of Execution c. Function by @willsentance @FrontendMasters #javascriptTheHardParts #100DaysOfCode #developer_tips

NOTE: Always at the bottom of the call stack is our Global Execution Context. by @willsentance @FrontendMasters #javascriptTheHardParts #javascript #100DaysOfCode #developer_tips

JavaScript keeps track of what function is currently running by using a platform of the #javascript engine called THE CALL STACK. by @willsentance @FrontendMasters #javascriptTheHardParts #100DaysOfCode #developer_tips #JavaScriptdeveloper

The nature of a FUNCTION is it complete REPETITIVENESS. by @willsentance @FrontendMasters #javascriptTheHardParts #100DaysOfCode #developer_tips #JavaScriptdeveloper

MEMORY is a fancy word in JavaScript which means a place we STORE data. by @willsentance @FrontendMasters #javascriptTheHardParts #100DaysOfCode #developer_tips #JavaScriptDeveloper

Closure is the most elegant and beautiful feature in #javascript. If you truly understand it from first principles, you will understand many of the core pieces of the JavaScript engine. by @willsentance @FrontendMasters #javascriptTheHardParts #100DaysOfCode

in a clear and cordial manner. by @willsentance @FrontendMasters #javascriptTheHardParts #100DaysOfCode #developer_tips #JavaScriptdeveloper

Mid-level engineer takes any feature they're given to build. And even if they've not seen the technology or solution before, they can figure it out because they've learned how to learn. they're problem solving strong. by @willsentance @FrontendMasters #javascriptTheHardParts