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Vikas Rajput
@vikasrajputin 3 years, 9 months ago 702 views

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Ultimate Backend Development Roadmap in 2022:

📂Basics
📄Internet
📄Client-Server Architecture
📂Any Language & Framework
📄Java + Spring
📄Python + Django
📄JS + Node
📂Git
📂SQL/NoSQL
📂Basic DevOps
📄CI/CD, Cloud Hosting (AWS, etc)
📄Docker, Kubernetes

More from Vikas Rajput

Vikas Rajput
@vikasrajputin

OOPs Concept in Java

a thread...

OOP Concepts are very common in Software Engineering.

All the OOP languages like Java, Python, C++, .Net, etc. have this concept.

In this thread, we'll try to understand it from Java's standpoint.

There are six different concepts in OOP:

1. Object
2. Class
3. Inheritance
4. Encapsulation
5. Abstraction
6. Polymorphism

Let's understand them one by one...

Object:

Look around you, whatever you see can be considered an Object.

For eg: The chair you are sitting on, the table, your computer, your house, windows, your pet, you yourself!

An object has Behaviour (things it does or performs) and Attributes (things that describe it).

Example:

Note: B = Behavior, A = Attribute

Chair:
B - Moves, Adjust Height, Recline, etc.
A - Built Material, Color, Make & Model, Brand, Price, etc.

You:
B - Eat, Play, Watch Netflix, Sleep, etc.
A - Height, Weight, Age, DOB, Name, SSN, etc.

Vikas Rajput
@vikasrajputin

Java: Beginner Guide to Multithreading

a thread...

Multithreading is a concept of applying multitasking in Java.

Java supports thread-based multitasking.

Java program can be divided into several threads and those threads can be executed in parallel to support multi-tasking.

Two ways to create a thread in Java:

1. By Implementing Runnable Interface
2. By extending the Thread class

Let's create a thread by implementing the "Runnable" interface:

Steps:
1. Implement Runnable Interface
2. Override the run() method, and put your code inside it.
3. Pass the instance of your class to the Thread class constructor.
4. Call the start() method to run your thread.

Let's create a thread by extending the "Thread" class:

Steps:
1. Extend your class with Thread class
2. Override the run() method, and put your code inside it.
3. Instantiate your class.
4. Call the start() method to run your thread.

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Vikas Rajput
@vikasrajputin

Java: Acess Modifiers

a thread...

(Cheatsheet Included)

What is an access modifier?

Access Modifiers are a way of providing limited visibility to methods, variables, classes.

Different access modifiers provide different visibility due to which our program because less prone to unwanted changes.

Java has four access modifiers, let's see each one by one

public:
It's the least restrictive access modifier when any class, method, or variable is defined as public then it is accessible from anywhere.

protected:
Protected methods & variables can be accessed within the same package and also accessible to all child classes.

default:
When no access modifier is specified then java treats it as default. With default methods & variables are accessible within the same package.

private:
It's the most restrictive access modifier, when given to any methods & variable it is only accessible within the same class.

Vikas Rajput
@vikasrajputin

Java: Beginner Guide to Stream API

a thread...

Streams are a way to perform operations on the whole collection of data.

Stream never modifies the source data, it processes it and gives us the result without modifying the original data.

Let's see few popular ways to create stream:

1. Collection. stream()
2. Stream.of(T... values)
3. Arrays. stream()
4. Stream.builder()

Eg:️

Consider stream as a pipeline, where we perform mainly two different operations on the source data:

1. Intermediate Operations(IO)
2. Terminal Operations(TO)

Here's what the stream pipeline looks like:

Source -> Intermediate Operations -> Terminal Operations

Intermediate Operations(IO):

It returns another stream object, after this, we can either call another IO or TO.

Few methods in Stream API for Intermediate operations:
1. filter()
2. map()
3. sorted()

and many more...

Vikas Rajput
@vikasrajputin

Learn Core Java, in 30 days as an Absolute Beginner

a roadmap...

Core Java can be Overwhelming, in the beginning!

Let's see what are those topics you should cover and what you can skip in Core Java.

1. Theoretical Concepts (2 days)

- Features of Java
- JVM, JRE & JDK
- Memory areas in Java
- Basics of how Garbage Collection Works.

2. OOP Concepts (3 days)

- Objects and Classes
- Inheritance
- Polymorphism
- Encapsulation

This topic forms the basis of your Java learning. Spent enough time on this topic and understanding it using real-world examples and some

OOPs Concept in Java

a thread...
— Vikas Rajput (@vikasrajputin) April 4, 2022

3. Primitives data types, Operators & Arrays (3 days)

- Various primitives/non-primitives data types, operators
- What is their use, How to use them
- Various sizes of data types
- Arrays, practice a few of its problems
- 2D/3D arrays and their use cases, practice a few problems

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Anu Satheesh
@AnuSatheesh5

Thrikkangode Sree Randu Moorthy Temple
Ottappalam, Kerala. 🚩
#keralatemples

This is very unique temple as Shiva and Vishnu both are in the “linga” form in the same Garbhagriham. The Srikovil is in a circular pattern. Temple's Prathishta was done by Parasurama.

Mahadeva and Maha Vishnu in the same Srikovil is very rare Prathishta, but poojas are done separately Dhara is done to Maha Vishnu here. People suffering from “KAIVISHAM” and mental illness are fully cured on drinking a medicinal herb supplied by a nearby family here.

The root of the banyan tree around the Ayyappa Sannidhanam is said to have great powers for skin ailments.

Very ancient temple but was covered with forest for many years.
Later two persons Chakki and Chaathan, while cutting trees their axe hit on the nearby
@SriramKannan77

Vigrahams and it suddenly started bleeding. Later Devaprashnam was held and thus found out that these were murthy's of Shiva and Vishnu which was worshipped long back. And thus temple is constructed here.
Om Namah Sivaye
Om Namo Narayanaya
🕉🙏🕉

Vibhu Vashisth
@VIBHU_Tweet

RISHI PINGALA:THE ANCIENT INDIAN SAGE DISCREDITED FOR HIS MAJOR CONTRIBUTIONS TO MATHEMATICS & PHI

Have you ever heard about,"The Golden Ratio"?
The Golden Ratio or Phi(Greek) is a mathematical ratio of nature. Mother Nature is the most exquisite artist in herself.

&Its this Phi she uses to create all the beauty in World.
If anyone uses this ratio correctly in their art,it can turn into a spell-binding piece of work.Such is the significance of'Phi'.But my thread isn't about it.Its about somethin called'Fibonacci Series'&who actually made it

Phi is related to Fibonacci series(0,1,1,2,3,5,8,13,21,34...)
&this series is responsible for everything dat is beautiful on this planet. Just try to calculate the ratio of any 2 successive numbers ÷ each of them by the number before it in above infinite series.

E.g. 3/2=1.5, 5/3=1.666, 8/5=1.6, 34/21=1.61904 and so on. Did you notice something? The ratio is coming almost same every time. This ratio is called 'Phi 'which is numerically represented as 1:1.618. This Golden Spiral is made in exact proportion of 1:1.618.

The thing I want to emphasize here is that we always find only those things appealing and attractive that have Phi. It's in our subconscious. Isn't it some revelation? We are the part of this Divine proportion of the God or the Mother Nature. Check these:

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itrade(DJ)
@ITRADE191

Here is the detailed information of about strategy,

Entry time : 9.30 - 10
Exit : Upto you

Strategy :
Sell weekly ATM CE & PE at almost equal price
For ex : Sell Nifty 17250 CE at 50 and Nifty 17250 PE at 48 so it will become short straddle

Buy monthly ATM or near ATM CE & PE at matching price (5-10 points diff should be fine) as hedge
For ex : Buy Nifty 17250 CE at 150 and Nifty 17300 PE at 155 so it will become long straddle.

Weekly Short straddle + Monthly Long straddle

Adjustment:

• If you feel slightly bullish/bearish then no adjustment needed
• If Nifty moves 50 up or down and sustain then just simply roll up or down half of qnty and keep rest of the quantity. If market goes up or down further then roll up or down rest.

• If Nifty moves one side or about to breach BEP then add equal amount of lot. This can balance tested side. For ex: If I bought 17300 CE 4 lot as hedge then add 4 lot so you will have only one side risk . Note: Remember to keep SL at cost price (only for additional lot bought)

Capital requirement:
2.2 L for 4 lot
Adjustment requires additional capital upto 1L

Note : High risk high reward strategy, please don’t execute until you fully understand. Kindly do paper trading or backtest.
RR : 1:1
POP : 45-55%

Buzz Chronicles
@buzz_chronicles

@SaveToBookmarks Nǐ hǎo! Saving all night and all day :) Original tweet by @AnJamison: "@SethAbramson @buzz\_chronicles @buzz\\\_chronicles @buzz_chronicles save as cat...". See You soon! ✌

Hello! Pleasure is mine. Original tweet by @SaveToBookmarks: "@AnJamison @SethAbramson @buzz @buzz_chronicles @pdfmakerapp @Readwiseio @thread...". Cheers! 👉

$Self-Care Canvas \U0001f98b$

Self-Care Canvas 🦋...
@selfcarecanvas

10 Hard Truths of Psychology and Life:

1.

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Seth Abramson
@SethAbramson

(THREAD) Pre-election Russia collusion may take down Trump. It's equally possible the Trumps' pre- and post-election collusion with Saudi Arabia, the UAE, and Israel will do it—a course of collusion also connected to the Kremlin. I explain here. I hope you'll read on and retweet.

1/ I must stress how unbelievably complex the "Grand Bargain" theory of the Trump-Russia case is—a different thing from saying it's not substantiated. It's substantiated in *almost every single particular*—it just *also* happens to be very confusing. Not byzantine—just confusing.

2/ The basics: Saudi Arabia, Israel, and the UAE all view Iran as their chief regional enemy. Iran is propped up by Russia. Therefore the Saudis, Israelis, and Emiratis all need a US government willing to find a way to get the Kremlin to *stop* supporting Iran in the Middle East.

3/ The best way to get Russia to stop supporting Iran—or reduce support—was/is to drop all sanctions on Russia over its 2014 annexation of Crimea, as that'd be worth *trillions* to the Kremlin over the next decade. Everyone knew that Clinton wouldn't do this—and that Trump would.

4/ Per the NYT, on August 3, 2016, Donald Trump Jr. met secretly at Trump Tower with a Saudi and Emirati emissary, George Nader, as well as an Israeli intelligence expert, Joel Zamel, with *significant* ties to both Israeli intelligence *and* Russian oligarchs allied with Putin.

$Vibhu Vashisth \U0001f1ee\U0001f1f3$

Vibhu Vashisth 🇮🇳...
@VIBHU_Tweet

MAHARAJA CHHATRASAL BUNDELA was the great Bundela King who revolted against the Mughal ruler Aurangzeb.
Chhatrasal Bundela was born in year 1649 CE in Maur Hill of Bundela region to Champat Rai and Lal Kunwar. He was the descendent of Rudra Pratap of Orchha.

His ancesters were the vassals of Mughal Emperor. He drew inspiration from his father and revolted against the alien rule of Mughals. He was just 12 yrs old when his parents died in fight against the Mughal Army of Aurangzeb in 1661.

When his beloved father attained martyrdom in the year 166, the young Chatrasal was present in the last battle of his father against the Mughal and from these valiant campaigns,..

..he gathered the courage to free Bundelkhand from Aurangzeb’s rule.
He joined the Mughals initially, and was recommended by the Rajput King Mirza Jai Singh to be recruited in the Mughal Army in order to support their Deccan Campaigns.

But serving the alien rule of Mughals which brought chaos and misery to Bundelkhand was unacceptable for Chatrasal Bundela and his father’s incessant struggle against the Mughals kept the fire of independent Bundelkhand alive in his heart.

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$Lu_lu\U0001f498$

Lu_lu💘
@luciame16

Some thoughts on episode 54 of #Hercai

If you ever cross the distance and come to me, come with love that blooms in your heart.
~ Şems-i Tebrizi

#Reyyan #Miran #ReyMir #EbruŞahin #AkınAkınözü
#HercaiThoughts

1
I have to make a note before writing about this episode. I was the person (still am) who thinks that bringing back D. was a bad idea. I repeat it that for me the writing of S1 and S2 is like tossed into the bin with that plot evolution, but they had to invent something+
#Hercai

2
+ to be able to continue to prolong the general story after Aslan’s story did not work out. All the suffering of M., all the crying seems for “nothing” for two seasons and we viewers are also kind of fed up in seeing him cry all the time when with the upcoming episodes+
#Hercai

3
+he is justified the most to cry. With her resurrection now the attention shifts back to Miran’s storyline and I don’t know if I like this to be honest. This said, Dilsha is here and we have to deal with her.
#Hercai

4
So, my comments are going to be how I find they wrote her into the story, the details we get to know, the flashbacks we get to see, the way it was filmed and directed, with leaving out if I agree on it or not but describing along the way what I saw.
#Hercai

Jaya_Upadhyaya
@Jayalko1

ANTARVEDI LAKSHMI NARASIMHA SWAMY, EAST GODAVARI DIST.(AP)

Located where Vasistha Godavari joins Bay of Bengal.

Present structure was built by Kapanati Krishnamma of Agnikula Kshatriya clan in 1823.

It is one of the oldest among 32 Narasimha Kshetras in AP.
@LostTemple7

Legend says that here Maharishi Vasishta prayed to Narasimha to end the demon Rakta Vilochana.

Narasimha created Maha Maya, also called Ashwaroodambika or Gurralakka to suck his blood as he got a boon from Brahma that blood falling from his body would produce another demon.

After his death, the stream of blood was let out by Maya to form a pond called Rakta Kulya.

Narasimha,then,washed Sudarshan Chakra at a place called Chakra Tirtha.

Brahma is said to have performed Yagna and installed Shiva Linga here. Hence the place was called Antarvedi.

Later Sri Rama prayed here and Arjun also visited here.

Panchamrita Abhishekam is done every day.
One can have Nijarupa Darshanam (main murti without any decorative shield) between 6.00 a.m. and 8.00 a.m.

Anna Prasadam is very famous and distributed daily from 10:30 to 2 pm.

James Felton
@JimMFelton

Butt plugs were originally sold as a miracle cure for headaches, acne, and insanity

Thread, article here and h/t: @qikipedia :
https://t.co/Ts84xnmWKJ

For a long time, medicine was pre-occupied with the question "can this be solved by putting something in the butt?"

Take, for example, tobacco smoke enemas, in which 18th Century physicians saw drowning victims and attempted to de-deadify them by blowing tobacco smoke up their rectums with a pipe.

Despite having no medical benefit whatsoever, the practice was popular, and enema kits lined the Thames like lifebelts, ready to be used as one final humiliation for somebody who was crap at swimming.

This practice ended sometime after 1800 when it became apparent that it didn't really work, given how the anus famously isn't really connected to the lungs, but doctors weren't quite finished with having a poke around in the old anus to see what happens just yet.