Results for “Signals & state”
Small, practical examples. Search by task or narrow things down below.
Store an object associated with an element
jQuery: data retains JavaScript values without serializing them into HTML attributes.
jQuery✓ Tested
Store samples in a fixed-size ring buffer
Arduino / C: The write position wraps while the storage size stays constant.
Arduino / C✓ Tested
Update a nested object immutably
Update a nested object immutably with a small React component and explicit browser behavior.
React✓ Tested
Update one array item by its identifier
Update one array item by its identifier with a small React component and explicit browser behavior.
React✓ Tested
Use a context’s fallback value
Use a context’s fallback value with a small React component and explicit browser behavior.
React✓ Tested
Use React 19’s provider shorthand
Use React 19’s provider shorthand with a small React component and explicit browser behavior.
React✓ Tested
Validate access through a custom context hook
Validate access through a custom context hook with a small React component and explicit browser behavior.
React✓ Tested
Verify that a one-off container was removed
Docker / Compose: An automatically removed container no longer appears in an exact-name listing.
Docker / Compose✓ Tested
Abort a conflicting cherry-pick
Git: Abort removes the incomplete replay and returns to the previous branch state.
Git✓ Tested
Abort a conflicting rebase
Git: Abort returns the branch to its state before the rebase attempt.
Git✓ Tested
Abort a merge with unresolved conflicts
Git: Abort restores the pre-merge state in this clean practice repository.
Git✓ Tested
Add an optional field to an existing table
SQL: A nullable column permits existing rows to remain valid while data is filled later.
SQL✓ Tested