DEV Community: Umesh

Git Branch and Git Merge

Umesh — Mon, 06 Feb 2023 07:58:24 +0000

git branch
git checkout -b
git status
git add . or git add
git commit -m "type your message here"
git push --set-upstream origin
git push

-- when required
git config --local user.email ""
git config --local user.name ""

git checkout main
git merge
git pull
git push

git pull

Screen recorder, screenshot tool for Linux [Ubuntu]

Umesh — Thu, 14 Jul 2022 09:20:56 +0000

Install Kazam- Video recorder

sudo apt-add-repository ppa:sylvain-pineau/kazam

sudo apt update

sudo apt install kazam

sudo apt upgrade

To remove Kazam

sudo add-apt-repository --remove ppa:sylvain-pineau/kazam

sudo apt update

sudo apt upgrade

We can perform all task in above-mentioned steps from a command line as well using Shortcut Keys.
• Use below keys to Start the Recording SUPER-CTRL-R
• Use below keys to Finish the recording SUPER-CTRL-F
• Use below keys to Pause the recording SUPER-CTRL-P
• Use below Keys to Quit the recording SUPER-CTRL-Q

Note: SUPER key refers to the windows key which is available in most of the computers.

What is the difference between a for loop and an iterator in Python?

Umesh — Sun, 10 Jul 2022 07:11:56 +0000

Iteraor and for loop doing that exact same thing just with a little change.

before going to explain, first let me clear about iterator waht it is....

Iterator:

Basically Iterator is an object that contains a countable number of values. It means having multiple values/ objects so we can use iterator to traverse all the values.

In Python, Iterator object having two mendatory methods iter() and next().

List, Tuples, Dictionary, Sets all are iterable objects and we can iterate and travese all the values.

For loop implements iterator in the background.
Before For loop starts, It will create iteratator object and iterator/ traverse all the elements until the StopIterator exception arise.

# get the iterator 
iterator_object = iter(some_iterable_object) 

while True: 
    try: 
        # get the next item         
        item = next(iterator_object) 
        # do whatever you need to do with this item 
    except StopIteration:   
        break

So, For loop in nothing but an implementation of Iterator in an infinite while loop.