Tech Info Talks

val and var are two ways of declaring variables in Scala. val is immutable means it cannot be changed once declared. var is mutable means it can be changed at a later point of time in the program .

Amazon's CEO Jeff Bezos became world richest person pushing Microsoft Chairman Bill Gates to next.

Scala is a object oriented functional type programing language. All variables declared in scala is considered as objects.

Game of thrones season 7 will start from tomorrow July 18th .

Recently I came to know about a site TIO.run . It has almost 97 languages compilers which help you to code and execute. I find it very cool since you don't need to install anythin to  try out in your computer , instead write and compile it online. Try tio.run

To activate developer mode in Android , go to Settings > About phone . There you can see Build Number. Tap the option 7 times then developer mode will be activated. Now enjoy deploying the app you develop in Android Studio into the phone instead of creating virtual device in the IDE.

String data types STRING VARCHAR CHAR TINYINT SMALLINT INT BIGINT FLOAT DOUBLE DECIMAL BOOLEAN TIMESTAMP DATE

The following are the main complex data types in hive ARRAYS MAPS STRUCT UNION

To check the hive version from command prompt use the command. $hive --version Hive 1.1.0

Today I decided to sell my samsung monitor which I got 10 months back. It is having a vga port, which I cannot connect to my HDMI port laptop. I have decided to post in OLX. I downloaded the OLX app and as soon as it was open the camera icon came to take the picture of the item we need to sell. I took two pictures and was then searching for the category of the item to select. I only could find the option as 'other items'.To my surprise the title of the ad came automatically - Samsung flat screen monitor'. I did not even gave any other options everything what I need to say about the item was there including company name and also flat type (Only the screen size I had to give later). From the picture I took , they identified the type of object. Since the company name Samsung logo was present in the front of the screen it identified that and formed the title. What should I give more than these!. The image identification and analysis have grown so much that how easy it is mad...

One plus 5 is the latest one among the one plus series.Within a week of its cool launch users are coming up with minor issues in it. Some users are seeing jelly scroll effect - letters or images getting stretched when scrolling slowly on the screen. Apart from these the phone is cool and competing against it's peers Samsung Galaxy S8 and iPhone .

To view the IMEI number of the phone dial #*06#. This will display the IMEI number. If your are using a dual sim phone then 2 IMEI numbers will be displayed each for a SIM.

To add a pattern lock in android phone follow the below steps. 1) Open the Setting from the app list. Choose the option Security from the list 2) Select Screen lock from the page apperaring 3) Then we need to given the pattern which we need to use to lock or unlock the phone.Simply swipe along the dots with your finger.

This is the easy and coolest way to swap two numbers in python, a = 0 b = 1 print a,b #output 0 1 > 0 #One liner code to swap two numbers a,b = b,a  print a,b #output 1 0

Sometimes we have a list with which we may need to do the same action on it. In such cases xargs command is very useful in unix. Some scenarios: Get word count of the files in a file > ls | xargs wc -l

To send mail from UNIX terminal we can use mutt utility. Syntax : > echo " Some text " | mutt -a <Any attachment> -s "Subject line" -- email-address Example : > echo "Wish you happy birthday" | mutt -a "gift.jpg" -S "Happy birthday" -- techmail@techinfotalks.com

To access another server/machine we use ssh to authenticate and do communication. Syntax : >ssh user@server -P password This will login to another machine from our local system. Sometime we may need to fetch the content from another file in remote system , in this case we can use the below form >ssh user@server -P password "cat /home/abc/1.txt | grep <Text to search>" If we echo the above we can see the content from our system Eg : echo $(ssh user@server -P password "cat /home/abc/1.txt | grep MMDDYYYY") This will fetch the line with the date format specified from the file.

To use scp command to transfer a file to another server use the below syntax >scp <filename> <Target server>:<location> Example: >scp abc.txt ab-server:/home/abc/

Nokia has launched Android phones in India. The official launch is on June 13th 2017. It comes in 3 variants . Nokia 3 , 5 and 6. The price of the phone is also leaked before it's launch. Nokia 3 will cost Rs. 9990, 5 for Rs. 12990 and 6 variant costs Rs. 15990 in India. Nokia was one of the favourite brand during the first decard of 21st century. It lists it's shine with the launch of Apple iPhone and the subsequent growth smart phone industry with Android. Though it's late many are waiting for the Nokia Android phones launch.

I just completed by hadoop fundamentals course from Udemy.com . The videos were very well organized so that you will get the glance of what is this world of big data and how hadoop framework can play a major role is processing this big data. The course was insisting in downloading hortonworks hadoop development sandbox and working with it. Hortonworks are providing the hadoop environment setup to download and we can load it in a virtual machine. I have downloaded the virtual box sandbox file. The course gave a string insight on hadoop architecture and buzz words around it. It gave a in depth idea of hive and pig tools and how they play the key role in storing and processing data in the framework.