JavaScript, Redux & React

Redux is a state management library that helps you better manage state in your applications.

The Redux library is not specific to React. It's a library that you can use in any other library or framework like Angular, Vue, and even vanilla JavaScript.

Javascript is executed by browser with the help of execution engine as:

Firefox -SpiderMonkey
Chrome -V8

ES6 - use let in place of var

Equality Operator

"===" type and valuecompared
"==" value only compared

Following are considered False

undefined
null
0
false
NaN
' '

Special loops in javascript:

For...In

for(let item in items){}

For...of

for(let item of items){}

for(let i=0;i<10;i++){}

Basic rule in javascript - Avoid using Global variables.

Comments

API Basics

SSE (Server Sent Event) - sending data from the server

When constant update from server to client, this technique is better fit. - Progressbar update - Stock exchange (show data of the stock price, etc) Browser support this with HTML5 Using server-sent events - Web APIs | MDN

Algorithm solving Common Patterns & Techniques

These are targeted data manipulation strategies used to handle arrays, strings, and linked lists efficiently. Two Pointers : Uses two reference pointers to iterate through a data structure simultaneously, typically from opposite ends or at different speeds (Fast & Slow pointers). Sliding Window : Maintains a subset of data (a "window") over a sequential structure to track running statistics without recalculating the whole set. Prefix Sum : Pre-computes and stores cumulative sums of an array to allow for \(O(1)\) constant-time range sum queries. Dynamic Programming (DP ): Dynamic programming is an optimization technique used to solve problems by breaking them down into simpler subproblems and storing the results of these subproblems to avoid redundant computations. It is particularly effective for problems exhibiting overlapping subproblems and optimal substructure. Greedy Algorithm Breadth-First Search (BFS) / Depth-First Search (DFS) : Systematic graph and tree travers...

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