Events in Solidity smart contracts
The Ethereum blockchain logs events that are useful and can be queried. As smart contracts perform actions they can emit events to the logs in the blockchain environment. Click here for a step by step guide on how to add and emit events in your smart contract. System Logs are not part of the actual blockchain since they are not required for consensus.https://cryptomarketpool.com/events-in-solidity-smart-contracts/
- Events are declared using the “event” keyword
- To emit an event in a function use the “emit’ keyword
- Events are recorded in the transaction log of the block chain
- Events are cheaper to store then state variables
- Smart contracts cannot directly access the event logs
Crypto Market Pool
Crypto Market Pool - Events in Solidity smart contracts
Events are used to inform a calling application about the current state of a smart contract. As transactions occur on the block chain events are logged
In Django a database index is automatically created on the ForeignKey. You can disable this by setting db_index to False. You may want to avoid the overhead of an index if you are creating a foreign key for consistency rather than joins, or if you will be creating an alternative index like a partial or multiple column index.
#django #python #tips
#django #python #tips
Choosing Between Web APIs and Message Streaming
https://medium.com/capital-one-tech/choosing-between-rest-web-apis-and-message-streaming-8e2f4813a058
https://medium.com/capital-one-tech/choosing-between-rest-web-apis-and-message-streaming-8e2f4813a058
Medium
Choosing Between Web APIs and Message Streaming
Choosing between a web API and message streaming isn’t difficult, as long as you understand the characteristics of each one.
This page documents the time-complexity (aka "Big O" or "Big Oh") of various operations in current CPython. Other Python implementations (or older or still-under development versions of CPython) may have slightly different performance characteristics. However, it is generally safe to assume that they are not slower by more than a factor of O(log n).
https://wiki.python.org/moin/TimeComplexity
https://wiki.python.org/moin/TimeComplexity
Flutter State Management with provider package
https://www.youtube.com/watch?v=L_QMsE2v6dw&ab_channel=BenjaminCarlson
https://github.com/bjcarlson42/flutter-state-management
https://www.youtube.com/watch?v=L_QMsE2v6dw&ab_channel=BenjaminCarlson
https://github.com/bjcarlson42/flutter-state-management
YouTube
Flutter Provider Tutorial (State Management)
Learn how to handle state in Flutter using the provider package! In this Flutter Provider tutorial, we go over how to add the provider package to your Flutter app and use MultiProvider and ChangeNotifierProvider.
This video works with provider 5.0.0 and…
This video works with provider 5.0.0 and…
Django + Celery: Going deeper with background tasks in Python
https://levelup.gitconnected.com/django-celery-going-deeper-with-background-tasks-in-python-fa44958cf7cd
https://levelup.gitconnected.com/django-celery-going-deeper-with-background-tasks-in-python-fa44958cf7cd
Medium
Django + Celery: Going deeper with background tasks in Python
An essential tool for any web developer is making work happen in the background.
We added Python Quiz with Tips and Explanations to our website. Also you can run the code in Web Python editor to play with it!
Further more quiz will be added. Stay tuned!
Go To Quiz
Further more quiz will be added. Stay tuned!
Go To Quiz
Build a Reusable Card Component with Chakra UI
Cards are common UI components used to display a group of information in an organized layout. They are widely used components on many websites because they are intuitive and aesthetically pleasing and keep content hierarchy easy to understand.
Read
Cards are common UI components used to display a group of information in an organized layout. They are widely used components on many websites because they are intuitive and aesthetically pleasing and keep content hierarchy easy to understand.
Read
Full StackE-commerce (myntra clone) series using Flutter, NodeJs, MongoDb and ExpressJs
Read Tutorial
Read Tutorial
DEV Community
Full StackE-commerce (myntra clone) series using Flutter, NodeJs, MongoDb and ExpressJs
Hi everyone, Here is a glimpse of recent progress of shopping app inspired by #myntra...
Winston Logger - Full tutorial with a sample Nodejs application
Winston Logger is one of the most popular logging libraries for Node.js. It is designed to be a simple and universal logging library supporting multiple modes of transport. A transport is essentially a storage device for the logs.
Read
Winston Logger is one of the most popular logging libraries for Node.js. It is designed to be a simple and universal logging library supporting multiple modes of transport. A transport is essentially a storage device for the logs.
Read
5 Best Courses to learn Software Architecture and System Design for Programmers
If you have been programming for a few years, then you know that Software design or System design is one of the tricky concepts to master. You can quickly learn a programming language like Java or Python, but creating software using that programming language is a different thing.
Read
If you have been programming for a few years, then you know that Software design or System design is one of the tricky concepts to master. You can quickly learn a programming language like Java or Python, but creating software using that programming language is a different thing.
Read
Grokking Modern System Design Interview for Engineers & Managers
https://www.educative.io/courses/grokking-modern-system-design-interview-for-engineers-managers
https://www.educative.io/courses/grokking-modern-system-design-interview-for-engineers-managers
Educative
Grokking Modern System Design Interview for Engineers & Managers
System Design interviews are now part of every Engineering and Product Management Interview. This course immerses the learner into the design of systems and makes them ready for any new design problems.