React Native – How to authenticate with AWS Cognito?
React Native – Setup config file You need AWS side: Identity Pool Id User Pool Id User Pool Client Id Install dependencies Create “aws-exports.js“ userPoolWebClientIdThere […]
Typescript – How to fix errors?
How to check TypeScript in project folders? Remember to exclude node_modules folders by configuring Could not find a declaration file for module ‘third-party-library-name’. ‘third-party-library-name.js’ has […]
React Native – How to setup push notification with Firebase (4)?
How to create DB for sending notification to a specific device? How to create related APIs? API of getting user id, fcmToken 2 APIs of […]
React Native – UI/ UX (1)
How to create a React native theme? Create theme.js file Wrap theme content by styled-components Usage A global Toast with callback Button native-base How to […]
React Native Web – Installation
How to use react-native-web for existing ReactJs app (1)? You can install react-native-web for your existing npx create-react-app my-app Install babel-plugin-module-resolver plugin to resolve your project modules […]
TLS/SSL – Why is API call failed?
Error message: The SSL connection could not be established, CERTIFICATE_VERIFY_FAILED Check all latest vulnerability & misconfiguration SSL Labs by Qualys Certificate issuer, validity, algorithm used […]
Search tool – How to use ripgrep?
Installation Usage How to search all files in the current directory (and its subdirectories) for a string? How to search specific language files?
iOS Programming (1) – All about Swift
What’s optionals? Value of a variable is optional, it can be nil or not nil Define a variable Unwrap optionals Safety check How to write […]
Blinkist – Resilient
What’s in it for me? Develop your inner strengths. In life, you can’t always trust the outside world, other people, or even your own body. […]
PostgreSQL – How to use “upsert”?
If data exists, do nothing (don’t INSERT) If name column has same data, do nothing If data exists, UPDATE row Before After