SyntaxDB — A Perfect Programming Syntax “Search Engine” For Coders | Padsa Information

SyntaxDB calls itself a programming syntax database that wishes to eliminate the need to use Google to search syntax during coding. It allows you to search your syntax queries and shows you helpful results along with further documentation. Currently, SyntaxDB supports nine popular programming languages.

Very often programmers new to the field ask if is it okay to use Google and Stack Overflow to look up some syntax. The answer is yes — searching the web is a routine task of a good developer and its frequency even increases with time. Using Google doesn’t make you a bad programmer. Instead, it makes you even better at it and teaches you new things.

To make things even easier for programmers, Anthony Nguyen, a software developer studying at Queen’s University, has created SyntaxDB.

This website calls itself the programming syntax database and allows you to search your required query. Nguyen calls it helpful for those who often visit Google to look for their programming related queries.

The website’s home page is very simple and plain. You just need to enter a language or a concept, and it starts showing relevant suggestions. As soon as you hit enter, a search result page is shown to address your query.

Once you click on a concept, you are shown a small definition and syntax along with some related notes and examples. In the right sidebar, there are links to the official documentations for more help.

Currently, SyntaxDB supports 9 languages — Java, C, C++, C#, Python, Ruby, JavaScript, Swift, and Go.

SyntaxDB also offers integrations with DuckDuckGo, Slack, and Visual Studio Code to make coding easier. There’s also an API available that lets you write your own integration.

In future, the website plans to provide more plugins for code editors and increase the size of the database and the number of programming languages.

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Why should you choose java as your primary programming language | Padsa Information

Java is a high-level object oriented programming language and computing platform developed by Sun Microsystems and released in 1995. With more than 9 million developers worldwide, java enables us to develop and deploy applications and services.

From laptops to data centers, game consoles to super computers and cell phones to the Internet, java is everywhere.

Why Choose java?

Although there are many reasons why a software developer choose java, below are some of the popular reasons:

• Develop software on one platform and deploy it on virtually any other platform.
• Create programs that can run in a web browser and access available web services.
• Develop server-side applications like online stores, polls, image galleries, form processing and more.
• Create powerful applications for mobile phones and other embedded devices.

JRE provides the run-time engine JVM along with the class libraries which contains the predefined functionality.

Using JDK programmers can create and run Java programs. But with JRE alone, programmers or users can only run already compiled Java programs. We cannot create Java programs using only JRE.

The JVM specification is a document which contains formal information about what a JVM implementation should contain. A single specification allows various interoperable implementations.

What should I know before moving further?

Although no technical details about programming languages are needed, you should have knowledge regarding basic concepts like what is a program, programming, use of programming languages etc. This java tutorial is developed in such way that it allows beginners or starters to understand every concept with as less effort as needed.

Although no knowledge is required regarding other programming languages, familiarity with C or C++ allows you to learn the java concepts faster.

Intended Audience

This java tutorial is intended for beginners or starters who are new to java. It will also act as a guide for novice programmers and experienced programmers to recollect the use of various core concepts in Java.

Take your time to comment on this article.

Linux Basic Commands

The below commands are important and often used. For more checkout the image at the bottom of the article

• mkdir – make directories
  Usage: mkdir [OPTION] DIRECTORY…
  eg. mkdir lhn
• ls – list directory contents
  Usage: ls [OPTION]… [FILE]…
  eg. ls, ls ­l, ls lhn
• cd – changes directories
  Usage: cd [DIRECTORY]
  eg. cd lhn
• pwd ­-  print name of current working directory
  Usage: pwd
• vim – Vi Improved, a programmers text editor
  Usage: vim [OPTION] [file]…
  eg. vim lhn.txt
• cp – copy files and directories
  Usage: cp [OPTION]… SOURCE DEST
  eg. cp sample.txt sample_copy.txt
  cp sample_copy.txt target_dir
• mv – move (rename) files
  Usage: mv [OPTION]… SOURCE DEST
  eg. mv source.txt target_dir
  mv old.txt new.txt
• rm ­ remove files or directories
  Usage: rm [OPTION]… FILE…
  eg. rm file1.txt , rm ­rf some_dir
• find – search for files in a directory hierarchy
  Usage: find [OPTION] [path] [pattern]
  eg. find file1.txt, find ­name file1.txt
• history – prints recently used commands
  Usage: history
• cat – concatenate files and print on the standard output
  Usage: cat [OPTION] [FILE]…
  eg. cat file1.txt file2.txt
  cat ­n file1.txt
• echo – display a line of text
  Usage: echo [OPTION] [string] …
  eg. echo I love India
  echo $HOME
• grep ­- print lines matching a pattern
  Usage: grep [OPTION] PATTERN [FILE]…
  eg. grep ­i apple sample.txt
•  wc ­- print the number of newlines, words, and bytes in files
  Usage: wc [OPTION]… [FILE]…
  eg.  wc file1.txt
  wc ­L file1.txt
• sort – sort lines of text files
  Usage: sort [OPTION]… [FILE]…
  eg. sort file1.txt
  sort ­r file1.txt
• tar – to archive a file
  Usage: tar [OPTION] DEST SOURCE
  eg. tar ­cvf /home/archive.tar /home/original
  tar ­xvf /home/archive.tar
• kill – to kill a process(using signal mechanism)
  Usage: kill [OPTION] pid
  eg. kill ­9 2275
• ps – report a snapshot of the current processes
  Usage: ps [OPTION]
  eg. ps,  ps ­el
• who – show who is logged on
  Usage: who [OPTION]
  eg. who , who ­b , who ­q
• passwd – update  a user’s authentication tokens(s)
  Usage: passwd [OPTION]
  eg. passwd
•  su –  change user ID or become super­user
  Usage: su [OPTION] [LOGIN]
  eg. su remo, su
• chown – change file owner and group
  Usage: chown [OPTION]… OWNER[:[GROUP]] FILE…
  eg. chown remo myfile.txt
• chmod – change file access permissions
  Usage: chmod [OPTION] [MODE] [FILE]
  eg. chmod 744 calculate.sh
• zip – package and compress (archive) files
  Usage: zip [OPTION] DEST SOURSE
  eg. zip original.zip original
• unzip – list, test and extract compressed files in a ZIP archive
  Usage: unzip filename
  eg. unzip original.zi
• ssh – SSH client (remote login program)
  “ssh is a program for logging into a remote machine and for
  executing commands on a remote machine”
  Usage: ssh [options] [user]@hostname
  eg. ssh ­X guest@10.105.11.20
• scp – secure copy (remote file copy program)
  “scp copies files between hosts on a network”
  Usage: scp [options] [[user]@host1:file1] [[user]@host2:file2]
  eg. scp file1.txt guest@10.105.11.20:~/Desktop/
• fdisk – partition manipulator
  eg. sudo fdisk ­l
• mount – mount a file system
  Usage: mount ­t type device dir
  eg. mount /dev/sda5 /media/target
• umount – unmount file systems
  Usage: umount [OPTIONS] dir | device…
  eg.  umount /media/target
• du – estimate file space usage
  Usage:  du [OPTION]… [FILE]…
  eg. du
• df – report filesystem disk space usage
  Usage: df [OPTION]… [FILE]…
  eg. df
• quota – display disk usage and limits
  Usage: quota [OPTION]
  eg. quota ­v
• reboot – reboot the system
  Usage: reboot [OPTION]
  eg. reboot
• poweroff – power off the system
  Usage: poweroff [OPTION]
  eg. poweroff
• kate – KDE Advanced Text Editor
  Usage:  kate [options][file(s)]
  eg. kate file1.txt file2.txt
• vim – Vi Improved, a programmers text editor
  Usage: vim [OPTION] [file]…
  eg. vi hello.c
• gedit ­ A text Editor. Used to create and edit files.
  Usage: gedit [OPTION] [FILE]…
  eg. gedit
• bg – make a foreground process to run in background
  Usage: type ‘ctrl+z’  and then ‘bg ‘
• fg – to make background process as foreground process
  Usage: fg [jobid]
• jobs – displays the names and ids of background jobs
  Usage: jobs
• sed ­  stream editor for filtering and transforming text
  Usage: sed [OPTION] [input­file]…
  eg. sed ‘s/love/hate/g’ loveletter.txt
• awk ­ pattern scanning and processing language
  eg.  awk ­F: ‘{ print $1 }’ sample_awk.txt
• find ­ search for files in a directory hierarchy
  Usage: find [OPTION] [path] [pattern]
  eg. find ­name file1.txt
• locate – find or locate a file
  Usage: locate [OPTION]… FILE…
  eg. locate file1.txt

Linux File Permissions

• 3 types of file permissions – read, write, execute
• 10 bit format from ‘ls ­l’ command
  1             2 3 4      5 6 7     8 9 10
  file type    owner     group    others
  eg. drwxrw­r­­   means owner has all three permissions,
  group has read and write, others have only read
  permission
• read permission – 4, write – 2, execute ­1
  eg. rwxrw­r­­   = 764
  673    =   rw­rwx­wx
  

How To Pick Your First Programming Language (4 Different Ways)

Learning coding from scratch could be a tough task and it could take years of hard work to master a language. So here I am going to address the biggest problem a beginner faces: How to pick up my first programming language?

Recently I came across with a very enriching infographic that addressed the same question. Udacity has utilized the date of the top ten programming languages in the US (provided by IEEE Spectrum) to pick the best programming language for you as a beginner.

The basis on which this infographic is made varies from location, your lifestyle and the potential growth in career after selecting that particular language.

Based on the flexibility, Python or C++ comes first as it allows you work on the variety of fields such as gaming to making of embedded systems. JS or PHP prepares you for a web development career. Similar observations and trends are made based on the average pay per year, geography and popularity.

Take a look at the infographic below:

Did you find this infographic helpful? Share this article with your friends.

What are the some of the best programming tips and tricks | Padsa Information

• Readability is the path to more interesting projects within a career.
• Readability is the path to knowing what you wrote 5 years ago, and makes code reuse actually viable
• Readability is the path to acquiring protégées that can learn from your style.
• Readability that is understandable by others allows people to appreciate your code at a level of architecture, not just functional.
• Readability is the path of lease resistance when you have a bug in your code.
• Readability is the how you put ideas into understandable text and syntax, much like writing a paragraph in natural language.
• Readability is somehow not a priority for most other developers, however it’s probably pretty important to your development director, if you work for one.
• Readability is more important than most believe. With moore’s law, it’s even more important to focus on readability than pre-mature optimization.

Here’s more:

• Most schools and colleges teach computer science like trade school skills. How to fix a car. How to be a dental assistant. How to be an admin.
• Most schools and colleges don’t realize there’s a difference between Computer Science and Programming. These are different.
• Most of the people applying for job in California are Programmers, when the job actually requires a Computer Scientist.
• Most people only know one or three programming languages. I personally believe you need to know between 7–8 of them to really master the idea of programming.

Psychology wise?

• Most programmers are very insecure about their programming skills and end up in bandwagon debates over which programming language is better.
• Following that, most don’t realize that each programming language is just a tool that’s better at something while other is better at something else… Like speaking Spanish while in Spain, or knowing Chinese in the middle of China down. Right tools for the job.
• Most programmers are habituated to just google everything, that’s how they were taught.
• Most insecure programmers rave about how “compact” their code is. Which serves very little purpose on compiled languages.
• Most insecure programmers focus on hyper tuning a few lines of code. Good programmers focus on delivering functional and useable software.

Habits….

• Most programmers follow the syntax and structure of the style they were taught. Very few question the style they were taught. Examples are {’s on the if-statement line, or on the next line vertically aligned with the }.
• Most programmers don’t make diagrams before they begin experimenting. Many just copy some existing example and start their modifications from there (which runs the risk of adopting bugs from existing examples).
• Most programmers don’t unit test. They believe they are better than that, or they are lazy.
• Most programmers read xkcd.
• Programmers that are computer scientists are better at computational problems.

What most don’t realize about computer science (as opposed to only programming.)

• You can merge sort your socks.
• You can apply scalability methods of algorithms to work labor level processes to improve business efficiency.
• You can learn other fields and industries because CS is a catalyze for industries like physics, chemistry, rendering, etc…
• You can apply CS methods to accounting, management, logistics, market trends, human resource management, workflow processing engineering, etc…
• Computer science has philosophies within it that can change your mode of thinking.

Lots and lots. It’s amazing what you can do if you pay attention to the computer science bit, rather than only how to program software.

Computer science includes:

• Hardware
• Software
• Programming
• Algorithms
• Problem solving
• Efficiency measurement methods
• Stability methods
• Integration concepts
• Computer architecture

And most importantly….

• Computer Science History

You learn to appreciate these things when you take in CS and listen in beyond only the programming trade skill.

Either you are a viable employee… Or you’re an amazing one that could hold a position of technical leadership.

Take your time to comment on this article.

Here is How to run Kali Linux on your Android device | Padsa Information

This tutorial mainly created for Linux fans. Follow the given steps below to install Kali Linux on your Android phone.

Step 1: Install Linux Depoly on your Android Mobile.

Step 2: Now launch “Linux Depoly” and click download icon

Step 3: In Depol tab click and change the Distribution to Kali Linux

Step 4: Now Change the VNC settings according to your mobile screen.

Step 5: Once done click Install(Start GNU/Linux installation).

Note: This might take few minutes to be completed.

Tips: Recommended to do it on a Wi-Fi.

Step 6:  After installing Kali Linux now click Reconfiguration button. After that hit Start.

Step 7: Now download and install Android-Vnc-Viewer and enter the details. Once every goes smooth then you can start using Kali Linux.

Don't forget to comment below .

Arch Linux 2017.01.01 Released, ISO Files And Torrents Available For Download | Padsa Information

Thanks to the hard-working Arch Linux developers, the first Arch Linux ISO images of 2017 are available for download. The latest release, i.e., Arch Linux 2017.01.01, is powered by Linux kernel 4.8.13. While the first time users can grab the ISO images and torrents from Arch’s website, the existing users can update their systems using `pacman -Syu.’

Arch Linux installation isn’t something that involves simply clicking next and skip buttons. It includes multiple steps like partitioning the hard drive, formatting them, enabling swap, mounting partition as root file system, and manually downloading and installing the base OS. The user also needs to run various commands for setting up various things.

There’s no denying the fact that getting an Arch Linux machine up and running needs a little more time and commitment — as compared to other Linux distributions like Fedora or Ubuntu. But, this practical approach teaches you many things and it appeals lots of hardcore Linux enthusiasts.

Arch Linux 2017.01.01 — first ISO spin of 2017

As a great news for Linux enthusiasts, the first ISO snapshot, i.e. Arch Linux 2017.01.01, has been made available for download. This means that the devs have been working hard in the holidays to bake this Linux treat.

Contrary to what many of you would’ve expected, Arch Linux 2017.01.01 is powered by Linux kernel 4.8 series, version 4.8.13 to be precise. The size of the latest ISO image is 867MB.

As this image is intended for the new installations only, the users can burn this on a DVD, mount it as ISO, or write it to a USB drive using some utility.

Arch Linux 2017.01.01 download and update

New users can grab the ISO images and torrents by visiting the Arch Linux download page.

The existing Arch Linux users can update their systems using the following command:

1	pacman -Syu

So, are you going to try out the latest release of Arch Linux by updating your system? Don’t forget to share your views and feedback.