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

Junior Engineers takes any feature they're given to build. And if they've seen that technology or maybe the solution before, they can solve it. by @willsentance @FrontendMasters #javascriptTheHardParts #100DaysOfCode #JavaScriptdeveloper