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Small, practical examples. Search by task or narrow things down below.

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GitCommit history & revision selection

Check what kind of Git object a revision names

Git: cat-file -t distinguishes a commit, tree, blob, or annotated tag.

Git✓ Tested
PowerShellCommands & execution context

Check whether a command can be resolved

PowerShell: Get-Command with a local error override supports an expected missing-command lookup.

PowerShell✓ Tested
Linux CommandsSorting & joining records

Check whether a file is already sorted

Linux Commands: Use sort -C for a quiet status check that does not rewrite the file.

Linux Commands✓ Tested
JavaScriptNumbers & numeric validation

Check whether a value is a safe integer

JavaScript: Number.isSafeInteger also checks the exact-integer range supported by Number.

JavaScript✓ Tested
TypeScriptNumbers & numeric validation

Check whether a value is a safe integer

TypeScript: Number.isSafeInteger also checks the exact-integer range supported by Number.

TypeScript✓ Tested
Linux CommandsGetting Started

Check whether two practice files match

Linux Commands: Check whether two practice files match using GNU/Linux commands in an empty practice directory.

Linux Commands✓ Tested
Docker / ComposeCompose service options

Choose a service’s internal hostname

Docker / Compose: hostname controls the name reported inside the container.

Docker / Compose✓ Tested
Docker / ComposeGetting Started

Choose an image’s default directory

Docker / Compose: Choose an image’s default directory with a complete introductory Dockerfile.

Docker / Compose✓ Tested
Docker / ComposeDockerfile patterns

Choose Bash with pipefail for build commands

Docker / Compose: SHELL changes the interpreter for subsequent shell-form instructions.

Docker / Compose✓ Tested
ReactGetting Started

Choose between two render branches

Choose between two render branches with a small React component and explicit browser behavior.

React✓ Tested
ReactContext & shared state

Choose labels from a language context

Choose labels from a language context with a small React component and explicit browser behavior.

React✓ Tested
Docker / ComposeGetting Started

Choose the command a container executes

Docker / Compose: Choose the command a container executes using a locally available Ubuntu image.

Docker / Compose✓ Tested