100xdevs

Foundation - HTML CSS Javascript

1. Zerodha -

JS - Foundation

1. Compiled vs Interpreted Language

   • C++ is compiled language.
   • JavaScript is interpreted language.

2. Strict vs Dynamic Languages

   • type of the variable is strict
   • Javascript is loosely typed language (dynamic nature).

3. Single Threaded nature of Javascript

   • Executes one command at a time, in-order they are written.

4. Simple primitives

   • Variables (var/let/const)
   • Data types - Strings, numbers and booleans
   • if/else
   • Loops - For loop

5. Complex primitives

   • Array
   • Objects
     • complex object

6. Functions

   • reusable code
   • callback function

Auxillary methods of JavaScript - Level 1

1. Strings
   • length, indexOf, lastIndexOf, slice(0,5), subStr (deprecated), replace("",""), split(','), trim(), toUpperCase, toLowerCase
2. Numbers
   • parseInt, parseFloat
3. Arrays
   • push, pop, unshift, shit, concat, forEach
   • callbacks, map, filter, reduce, find, sort

Level 2

1. Classes (Structure that is re-usable. A blueprint)
   • attributes, functions
   • static functions (associate with the class it self)
2. Date
3. JSON
   • JSON.parse
   • JSON.stringify
4. Maths
5. Objects
   • Object.keys() -> Array of keys
   • Object.values()
   • Object.entries(obj)
   • obj.hasOwnProperty('name')
   • object.assign

Loops - Functions - Callbacks

• anonymous function
• passing function as argument

Async Functions - Browser Architecture - Promises

• Async functions
• web apis - setTimeout
• js engine architecture
• promise
• async/await