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.

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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:

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