Connection pool A connection pool is a set of connections that the application can reuse. You avoid the overhead of constantly creating and destroying connections, and you can control the maximu...

Summary Tables A summary table typically contains aggregated information that is expensive to com pute on the fly. For instance, in the MovR application, we might have a dashboard that shows reve...

CockroachDB comes with built-in load generators for simulating different types of client workloads, printing per-operation statistics and totals after a specific duration or max number of operation...

Client-side versus Server-side Client-side—(front-end) refers to the code you write that results in something the user sees in his web browser. Client-side code typically includes JavaScript us...

Linting ESLint rules (https://eslint.org/docs/latest/rules)—Includes a list of configurations included in the ESLint recommended ruleset Airbnb style guide (https://github.com/airbnb/javascript)—...

third-party package https://github.com/SBoudrias/Inquirer.js npm install inquirer@9.1.4 Installing type definitions npm install --save-dev @types/inquirer@9.0.3 See https://github.com/Defini...

What should be logged? Given that logging has to be added explicitly by the developer and is always optional, how do you choose what to log? Here are a few examples: What to log: Pe...

Github Repository You can find the code here: https://github.com/facebook/jest. If you’re starting a new project, you can install Jest like this: npm install --save-dev jest We used the –sav...

GitHub Repository We created our first Terraform code files and initialized our project using terraform init. Then we invoked terraform apply running the code to create an Azure resource group. Fi...

GitHub Repository In many respects, CI is a stepping stone to CD, and usually setting up a CI pipeline is simpler than setting up a CD pipeline because CD pipelines have basically grown out of CI ...