DEV Community: Abhay Prajapati

I made a maze which follows the principles of the 👑 N-Queen Problem.

Abhay Prajapati — Sun, 28 Aug 2022 10:03:23 +0000

try Maze!
The maze is a simple chess board with n number of rows and columns.
The work is simple for n number of rows and columns you have to place n number of queens in such a way that none of the queens should intersect to its rows, columns, and even diagonals.

In Computer Science the main goal is solve this problem in minimum number of attempts.

There are several ways to solve this problem using methods like brute force, backtracking, dynamic programming etc.
Give it a try!
n-queen

Recoil: How was your experience using it ?

Abhay Prajapati — Tue, 26 Jul 2022 04:17:54 +0000

Explain your experience while using Recoil, what benefits your got? are you enjoying it?, even try make a comparison with any state management that you have used before.
Also, what's your views on state management ?.

So tried bun! the new JS runtime.

Abhay Prajapati — Fri, 08 Jul 2022 03:12:57 +0000

bun-scripts

Installation

$ curl https://bun.sh/install | bash

after this i opened my .bashrc and added the following line:

BUN_INSTALL="/root/.bun"
PATH="$BUN_INSTALL/bin:$PATH"
# as it wasn't added automatically, i added it manually

i restarted my terminal and it worked! 🎉

working with .env and bun

# then i did a fancy stuff
echo PORT=5000 >> .env
touch http.js

// http.js
console.log(process.env.PORT)
// USING ENVIRONMENT VARIABLES WITHOUT DOTENV MODULES.

bun run http.js

checkout the code @repo

sugggest me what should i try next with bun

🤝🏾Connect me on:
Twitter: 🕊️@Abhayprajapati_
Github: 🐧@theabhayprajapati

I Got access to the Dall-E 2 and here what i created first

Abhay Prajapati — Fri, 17 Jun 2022 08:20:02 +0000

it was Thu, Apr 7, 10:52 PM when i joined the waitlist for the Dall-E 2.

comeback to today I got access to for using it, big thanks to the Dall-E 2 team for giving me access to it.

I x Dalle

actually i has been interacting with ai model / tool like Github Copilot, and i was impressived by the way it worked.
So i was super excited to try dalle out

Here, are few results of my first try with dalle

live 🔴 Abhay x Dall•E

“Nikola tesla working on a Gadget, pixel art”

this is my favourite one, i am super impressed by the way it
worked

share your comment that i should try with dalle out

twitter : @abhayprajapati_

OOPs Lecture 1

Abhay Prajapati — Fri, 10 Jun 2022 15:14:37 +0000

OOPs Lecture 1

learned about contructor's

here is what understand about contructor is that;
we can create object of a class

class Person{
    String name;
    int age;
}

creating object of class Person

// 
Person p = new Person();
p.name = "John";
p.age = 30;
// so here as we have not created constutor's we need to write p.name; p.age;

class Human {
    String name;
    int age;
    public Human(String name, int age){
        this.name = name;
        this.age = age;
    }
}

Human h = new Human("John", 30);

// as we have created constuctor's we need not to write h.name; h.age;
// else we add that in the parameter of constructor's/fn
// contructors is a special function that is used to initialize the object

pay attention to the this keyword;
it is nothing but the object itself;
this.name == h.name

under the hood the this keyword will be replaced by the object (h) itself

If we donot provide this then we need to always need to write h.name object name;

repo for code🧑🏻‍💻

🤝🏾Connect me on:

Twitter: 🕊️@Abhayprajapati_
Github: 🐧@theabhayprajapati

suggest and edit🖋️

remove windows home screen icons with this

Abhay Prajapati — Sun, 22 May 2022 12:10:21 +0000

if you want a clean home screen with any apps/file/folder on windows you can try this

leftclick > views > uncheck show desktop icons

wow so clean 😲,

I have made a npm package that can help us to see UTC time right in your terminal

Abhay Prajapati — Mon, 02 May 2022 14:11:44 +0000

timeis

安装 || Install

npm i timeis -g
# global install help to access anywhere in computer

npm i timeis

Help's to see the UTC time right in your terminal, without any hassle

type timeis in your terminal to see the current time in UTC.

`timeis` with this you can access your UTC time in your terminal

timeis 
UTC 12:48:56

Usage📝

-h, --help: help

-v, --version: version

-l, --local: local time

-u, --utc: utc timeis

Thank you for using.

🤝🏾share your reviews on Twitter that'll make me happy😊

any problem or suggestion, please ping on Twitter @abhayprajapati_

@abhayprajapati (website)

@timeis repo

What are🤯 Main Memory, Stack, RAM, ROM, secondary Memory SSD and else? complete answer

Abhay Prajapati — Fri, 29 Apr 2022 13:33:03 +0000

Memory and Storage in electronics

Electronics have two main types of memory Main and secondary.

The primary use of Main(Primary) Memory

is to store the data of task👨🏾‍🏭 that is working currently, as Main memory is very close to CPU(Processor) 🖥, to CPU can talk to Main memory very easily, this could be anything the tab us are currently open, webpage, cursor, the variable that you have written these all are stored in RAM,

but even you when you close you know when you close the tab, or programme if you haven't save📁 that data, it will be lost❌.

so this should be saved somewhere else, and when you open the tab again, it will be there, here Storage, comes into play you can store your data in any device, Floppy💾, Hard Disk Drive💽, SSD🖴 and USB🔌, also it can be on Cloud☁️, it totally depends on you the user.

Use of Secondary Memory

as talked above Secondary have of a different type but the function is the same as store permanently✅.
from operating system🐧, application📱, and other files📂.

Main memory

It offers a very fast read/write speed but less storage capacity, it requires a power supply and as power goes it losses it's data.

RAM
ROM
Cache(cash)

are in the Main memory.

RAM

any thing runs has to loads on the RAM as CPU can process that fast, and also any location(data) can be access by CPU in no time(instantly), so it is called as Random Access Memory, it is read/write speed.

the code you write; and when you run it; it runs here, Stack the famous word in CS which I don't understand at the beginning, makes its house inside the RAM.

ROM

Rom is directly writing for you from the manufacturer, it is read-only, so it is called Read-Only Memory
the basic function is to start the applications' control of the Input/Output devices, and also to start the OS.

As, you don't need to config this stuff they are read-only, which means you and your computer can read from those files.

Cache

it stores the command👆🏾 that are frequently told to the processor(CPU), so it is called Cache Memory. It is quickest to access with the least storage capacity

Secondary Storage (Memory)

it offers read/write speed and storage capacity, but it is not fast to access as compared to Main memory(RAM), not dependent on the power you can access you even if the power goes,1000X or times. think na you have to turn your computer off📴 does it losses it's operating system🐧 memory, you saved files📂, and you can access them again, also you can 🚌 from one device to another, and access there

There are two types of Secondary memory, Optical Dics💿, Floppy Disk💾, SSD🖴, HDD(hard disk drives)💽.

And these are the storage devices great storage capacity, it has multiple faces

these are all I knew about memory and storage, and that i wanted to share, if you want to learn memory I would recommend you to read the article from @Issac_Computer_Science

images credits: icons8.com
suggest edit✍🏾
@repo

ping me 🤙🏾on @twitter/abhayprajapati_

Thank you.

6 /100 DaysOfFlutter : Introduction to flutter Codebase

Abhay Prajapati — Thu, 28 Apr 2022 16:43:26 +0000

Create Flutter Project.

Flutter projects can be created using multiple ways.
here we will create using terminal

flutter create <project_name>

it will create a new project in the current directory.

Project Structure

`Andriod folder`

As flutter is the cross-platform mobile app development framework, making apps for android configuration is required, and that is done in `android folder, you can also find Gradle file in this folder.which is package manager for andriod.

`ios folder`

for making apps for ios configuration is required, and that is done in ios folder, even here you can find Xcode project file, for packages and plugins.

`lib`

this is the main folder for all the code, which is used for creating the app, everything start's from here in a flutter.

same stuff for windows and web

`pubspec.yaml`

Here is every information regarding your application form name:, description, version, what other packages you are using.

Packages What you they?

Packages are the libraries which can be used in your application.
In simple words, here people, organisations, even other open source communities have been built and you can use them then

it is similar to NPM for nodejs, pip for python, and so on

Package Manager for Flutter(dart)🎯

pub.dev is the package manager for flutter, it is used for installing packages, and for managing packages

see and sample the flutter project here
repo link: @github

ping 🤙🏾 me on @twitter

Basic Logic Not Math behind the boolean operator.

Abhay Prajapati — Wed, 27 Apr 2022 15:37:39 +0000

Gorege Boole tossed the concept of Boolean Algebra

and said one can represent any logical statement with AND, OR, NOT

Basic Logic is in their name

Starting with `AND`

assume AND as a 5-year-old child who demands telescope 🔭 and Starship🚀, so if you provide him with both stuff he will be happy, and if anyone or both aren't there the child will start crying.

Similar with AND if it say I want value x > 3 & y < 5 then the condition will only satisfy if both stuff are true

Telescope 🔭	Starship 🚀	Output Q
0	0	0
0	1	0
1	0	0
1	1	1

Moving towards `OR`

the same child here also, where now he demand Falcon 9 OR Saturn 5 as he wants to Mars. So, if you provide him Falcon 9 he will be happy as his Mission will be completed with Falcon 9, but show you aren't able to contact Elon to arrange Falcon 9 but you are able to contact NASA for Saturn 5 even then the 5 yr Child will be happy. Also, if you provided him with both Falcon 9 and Saturn 5 he will be happy as now he can talk to the crew too.

Similar, to OR, if it wants Falcon 9 || Saturn 5 if it gets Falcon 9 it will be satisfied even if it got Saturn 5 he will be satisfied, but it won't satisfy if both are False

Falcon 9🚀	Saturn 5 🪐🚀	Output Q
0	0	0
0	1	1
1	0	1
1	1	1

Now comes `NOT`

not is very simple to understand, it is used to negate the condition, so if just convert's the value of the condition, from true to false and false to true.
| Input A | Input B |
|:-------:|:-------:|
| 0 | 1 |
| 1 | 0 |

Now comes `XOR`, `NAND`, `NOR` above basics.

XOR

XORonly wants one true value to be true, example the child only wants SpaceX or Saturn 5 but not both, if you give both he will break the rocket in two pieces, so please with XOR you can only give him one of them.

Input A	Input B	Output Q
0	0	0
0	1	1
1	0	1
1	1	0

`NOR`

A situation where one except's nothing from anyone, the child is now grown up, now he doesn't need your help to build a complete rocket. If you don't give him anything he will be happy,

Input A	Input B	Output Q
0	0	1✅
0	1	0❌
1	0	0❌
1	1	0❌

`NAND`

Here the child doesn't want both things from you he only even if you don't give anything to him he will be happy, but if you give him both he will cry, but you can give one of any.

Input A	Input B	Output Q
0	0	1✅
0	1	1✅
1	0	1✅
1	1	0❌

credits to Isaac Computer Science

Repo: @Day5 Blog

ping 🤙🏾 me on Twitter @abhayprajapati

4 /100DaysOfFlutter : Dart: Enumerations, Classes and Objects

Abhay Prajapati — Tue, 26 Apr 2022 07:06:37 +0000

Dart List: `List<String> skills = ['Swiming', 'running', 'Karate']`

This line wiil be spoken as List of String named skills has values Swiming running Karate; you can also use your own way of reading and pro-nounching it.

List can also be called as array.

a List can contain only one data type of element.
for mutliple type of element we can use something called as Objects in the list.

Classes: Classes give us ability to make own type of data, a sort of template, protocol, rule for some Objects/ Variables.

class Insan extends LivingThings {
  String name;
  int age;
  Insan(this.name, this.age);
}

Now I can use this data types to make own variables with this data types.

  Insan Abhay = new Insan("Abhay", 19);

as before Insan is the type of variable, Abhay is the variable name 🆕 key word is for before it is new Variables made which has combination of data types/ mostly new key used when for a single variables we use mutilple dataytypes. Like, here we are using String and int at the same time passing the parameter's in the Class

Objects: Objects gives ability to make the variables the classes we make,

in reality anything that takes place, area, memory is a Objects as the Variable named Abhay which is created above is going to take place in the memory then it is an Object, Object have type can your own type also, Like Insan

  Insan Abhay = new Insan("Abhay", 19);

Object are also known as Instances; you can check by your self just print the Variable name

print(Abhay);
//Instance of 'Insan'

Making classes helps us to make better Objects; classes are created outside of the Function

Check The code here with example press . and open the in the browser and start practicing.

If dont' got at some point feel free to ping me on twitter @abhayprajapati_

Ok Bye.

3 / 100DaysOfFlutter: Dart Sound Null Safety, Null Assign, Null Check, Everything null.

Abhay Prajapati — Mon, 25 Apr 2022 01:12:23 +0000

Learning null Safety in Dart:

understanding why we need null Safety; Null means nothing is there. so handle the programme at any point in time if there is a value which is null what should be performed?

Sound NullSafety:

By sound you might is understand that here you may know when the value will be null; so for that flow, we use SOUND Null Safety

 int i = 0;
 i= null; ❌
  // here i is 0; but what if somepoint it becomes null;
  // then it will throw an error
  // so we need to add a check for null
  <!-- down arrow unicode -->

  int❓ j = 1;
    //^ this is a nullable variable; so in future it can be null; and wount' throw error.   
    // make any value nullable by adding ❓after the variable type.  
  j = null; ✅

List<String> names = ['Ram', 'Shyam', 'Hari'];
names[0] = null; ❌


List<String?> names2 = ['Ram', 'Shyam', null];
names2[0] = null; ✅

List<String>? names3 = ['Ram', 'Shyam', 'Hari'];
names3 = null ✅
// for making a list nullable we need to add ? after the list type here it is String.

List<String?>? names4 = [null, null, "Ram"]; ✅
// Here List as well as list Type is also nullable.

Null Assign:

Null Assign means if the value is null Assign this value

int? age = 12;
age = null;

int RealAge = age ?? 18;
// adding this ❓❓ after the variables (age) makes us sure that if any case the value of age is null the RealAge will be 18;

Null Check

Null check is a process of checking if the value is null or not, and perform tasks accordingly.



List<String>? names5 = null;
print(names5?.length);

// it is shortcut for
if(names5 != null) {
  print(names5.length);
} else {
  print("null");
}

print(Person?.skills?.length);✅
.❓.❓.❓
// it will only print the length of skills if the person is not null and if the skills are not null.

I will explain Objects; Classes in the next blog.

Share with me if anything is missing or you don't understand; don't shy 🥺

ping me on Twitter 🕊️ @Abhayprajapati_

Check the code for today here.
Repo

🤝🏾Connect me on:
Twitter: 🕊️@Abhayprajapati_
Github: 🐧@theabhayprajapati

DEV Community: Abhay Prajapati

I made a maze which follows the principles of the 👑 N-Queen Problem.

Recoil: How was your experience using it ?

So tried bun! the new JS runtime.

bun-scripts

Installation

working with .env and bun

checkout the code @repo

I Got access to the Dall-E 2 and here what i created first

I x Dalle

OOPs Lecture 1

OOPs Lecture 1

remove windows home screen icons with this

I have made a npm package that can help us to see UTC time right in your terminal

timeis

安装 || Install

Help's to see the UTC time right in your terminal, without any hassle

timeis with this you can access your UTC time in your terminal

Usage📝

Thank you for using.

What are🤯 Main Memory, Stack, RAM, ROM, secondary Memory SSD and else? complete answer

Memory and Storage in electronics

Main memory

RAM

ROM

Cache

Secondary Storage (Memory)

6 /100 DaysOfFlutter : Introduction to flutter Codebase

Create Flutter Project.

Project Structure

Andriod folder

ios folder

lib

pubspec.yaml

Packages What you they?

Package Manager for Flutter(dart)🎯

Basic Logic Not Math behind the boolean operator.

Gorege Boole tossed the concept of Boolean Algebra

Basic Logic is in their name

Starting with AND

Moving towards OR

Now comes NOT

Now comes XOR, NAND, NOR above basics.

XOR

NOR

NAND

4 /100DaysOfFlutter : Dart: Enumerations, Classes and Objects

Dart List: List<String> skills = ['Swiming', 'running', 'Karate']

Classes: Classes give us ability to make own type of data, a sort of template, protocol, rule for some Objects/ Variables.

Objects: Objects gives ability to make the variables the classes we make,

3 / 100DaysOfFlutter: Dart Sound Null Safety, Null Assign, Null Check, Everything null.

Learning null Safety in Dart:

Sound NullSafety:

Null Assign:

Null Check

`timeis` with this you can access your UTC time in your terminal

`Andriod folder`

`ios folder`

`lib`

`pubspec.yaml`

Starting with `AND`

Moving towards `OR`

Now comes `NOT`

Now comes `XOR`, `NAND`, `NOR` above basics.

`NOR`

`NAND`

Dart List: `List<String> skills = ['Swiming', 'running', 'Karate']`