Ali Abid Zaidi aliabidzaidi

Riverpod

Riverpod is primarily used for managing application state. State refers to data that can change over time and affects the UI Consists of Providers that define how the state is created, shared and updated. Secondly, Consumers which are widgets that access state from providers, additionally they rebuild automatically when state changes

Provider

Provider creates an object as a state and allows widgets to listen to it. Create from one place and access from multiple locations from the widget tree. Optimizes performance by filtering widget rebuilds or caching expensive state computations Makes code testable since providers can be overridden to behave differently during tests

REST API (Link)

Introduction

RESTful API is an interface that two computer systems use to exchange information securely over the internet.

Components of a Restful API

C++ Dynamic memory

Smart pointers in c++ enable automatic, exception safe, object lifetime management

unique_ptr
shared_ptr
weak_ptr
auto_ptr

Unique pointer

Smart pointer that owns and manages another object through a pointer and disposes that object the the pointer goes out of scope.

Fix for docker kea container restarting

export LOCAL_DIR=$(docker inspect -f '{{ .GraphDriver.Data.UpperDir }}' dhcp-kea-1)
pushd $LOCAL_DIR/run/kea/
rm kea.kea-dhcp4.pid
popd

Allama Iqbal's Poetry

Baal-e-Jibril Link

Apni Jolangah Zair-e-Asman Samjha Tha Main Link

اپنی جولاں گاہ زير آسماں سمجھا تھا ميں آب و گل کے کھيل کو اپنا جہاں سمجھا تھا ميں

https://askubuntu.com/questions/125257/how-do-i-add-an-additional-hard-drive

First you need to identified the new hard disk.

press CTRL+ALT+T to open a console then type :

lsblk You will see something similar with this:

loop0 7:0 0 86.6M 1 loop /snap/core/4486

Hadoop comma****nds

hdfs getconf -confKey fs.defaultFS  # ( new property )  # Get namenode of hadoop****

https://data-flair.training/blogs/top-hadoop-hdfs-commands-tutorial/

	// https://levelup.gitconnected.com/8-ways-to-measure-execution-time-in-c-c-48634458d0f9
	// Ways to Measure exeuction time in c++
	// 1. Using the ‘time’ Linux command (Run program with "time ./program")
	// 2. Using <chrono>
	// 3. With <sys/time.h> and gettimeofday()
	// 4. With <time.h> and time()
	// 5. Using <time.h> and clock()
	// 6. With <time.h> and clock_gettime()
	// 7. With <sysinfoapi.h> and GetTickCount64() (For windows)
	// 8. With <processthreadsapi.h> and GetProcessTimes() (For windows)

	// To Build and Run
	// g++ main.cpp -g -lgtest -lgmock
	// ./a.out
	// links
	// https://github.com/google/googletest/blob/main/docs/gmock_cook_book.md
	// https://stackoverflow.com/questions/58501850/googlemock-how-to-use-mocking-in-test
	// https://qiangbo-workspace.oss-cn-shanghai.aliyuncs.com/2018-12-05-gtest-and-coverage/PlainGoogleQuickTestReferenceGuide1.pdf

	#include "gtest/gtest.h"
	#include "gmock/gmock.h"

	// To Compile & Run
	// gcc -o test2 test2.c -lrdkafka -ljansson
	// ./test2

	#include <stdio.h>
	#include <unistd.h>
	#include "kafkaProducer.h"
	#include <librdkafka/rdkafka.h>
	#include <jansson.h>