DSA | Make a folder with your name in your respective team folder | Bot library

This is regarding a Spring Cloud Config Server hobby project (with @EnableConfigServer).

Yesterday, the application could be started.

Today, the application failed to start because of a Git communication error.

From GitHub's official blog post, it is mentioned that SHA-1 is no longer supported starting from 15 March 2022. And that explains the results I'm getting these 2 days.

March 15, 2022

Changes made permanent.

We’ll permanently stop accepting DSA keys. RSA keys uploaded after the cut-off point above will work only with SHA-2 signatures (but again, RSA keys uploaded before this date will continue to work with SHA-1). The deprecated MACs, ciphers, and unencrypted Git protocol will be permanently disabled.

Even if I didn't delete the existing SSH key, it still failed to start today. But anyway, now the only key under the "Deploy keys" section of the repository settings is an SSH key that was added after the March 15, 2022 cut off date.

Dependency Management:

Dependency:

application.yml:

Recently I came across a well-known design problem. 'Tiny URL'

What I found was people vouching for NoSQL DBS such as DynamoDB or Cassandra. I've been reading about Cassandra for a couple of days, and I want to design my solution around this DB for this specific problem.

1. What would be the table definition? If I choose the following table definition:

Create table UrlMap(tiny_url text PRIMARY KEY, url text);

Wouldn't this result in a lot of partitions? since my partition key can take on around 68B values (using 6 char base64 strings)

Would that somehow affect the overall read/write performance? If so, what would be a better model to define the table.

I've written a program that will check if a given string has all characters unique or not. I usually write in Python, but I'm learning C++ and I wanted to write the program using it. I get an error when I translate Python into C++: Thread 1: EXC_BAD_ACCESS (code=257, address=0x100000001)

I am using Xcode. When I run this program, I get the above error:

After upgrading to android 12, the application is not compiling. It shows

"Manifest merger failed with multiple errors, see logs"

Error showing in Merged manifest:

Merging Errors: Error: android:exported needs to be explicitly specified for . Apps targeting Android 12 and higher are required to specify an explicit value for android:exported when the corresponding component has an intent filter defined. See https://developer.android.com/guide/topics/manifest/activity-element#exported for details. main manifest (this file)

I have set all the activity with android:exported="false". But it is still showing this issue.

My manifest file:

I'm having some trouble installing the python cryptography package on my raspberry pi, specifically with python version 3.9.8 (installed with pyenv). The cryptography package is installed on my system using pacman (python-cryptography package), and thus works using the main python interpreter (3.10.1). However, I need some version of python 3.9 specifically for another package I am using in this project. Any time I try to install cryptography through the python 3.9.8 environment, I get the following error:

I have ec2 instance with ubuntu v20.04 and it has python v3.8.10 and pysftp 0.2.9.

I have generate .pem file from .ppk file using below command

puttygen sftp_server.ppk -O private-openssh -o sftp_server.pem

I am able to connect successfully to sftp server using command line-

I was using C++ in VS-Code for the past few months. A week back I installed python and used it in VS Code. Two days back I also installed Anaconda Navigator (Jupiter Notebook)

Now, I am unable to run C++ code in VS Code. On pressing the code run button in VS Code, the terminal shows the following output and then nothing happens:

I am trying to connect to some SFTP using a private key file that looks like:

I am a beginner in Java and currently completing a Udemy course on DSA. I am learning linked lists and am working on methods to insert and delete nodes to and from linked lists respectively.

From what I have learnt so far I know that we use condition head==null to check if the linked list is empty or not.

If the condition head==null is true then LinkedList is empty else it is not empty.

However, shouldn't we check whether tail==null as well because the tail will always refer to the last node in the LinkedList even after we make head==null?

Here is my code: