Results for “File operations & archives”
Small, practical examples. Search by task or narrow things down below.
Update rows selected by a related table
SQLite: Use EXISTS to limit updates based on an independent eligibility table.
SQLite✓ Tested
Update several classifications in one statement
SQL: A CASE expression computes the new value for each row covered by the update predicate.
SQL✓ Tested
Update several classifications in one statement
SQL Server: A CASE expression computes the new value for each row covered by the update predicate.
SQL Server✓ Tested
Update several classifications in one statement
Postgres: A CASE expression computes the new value for each row covered by the update predicate.
Postgres✓ Tested
Update several classifications in one statement
SQLite: A CASE expression computes the new value for each row covered by the update predicate.
SQLite✓ Tested
Use a build argument while creating an image
Docker / Compose: ARG supplies a build-time value that is not automatically a runtime environment variable.
Docker / Compose✓ Tested
Use a deque as a FIFO queue
Java: Add at the tail and remove at the head using ArrayDeque.
Java✓ Tested
Use a deque as a stack
Java: Use push and pop for last-in, first-out behavior.
Java✓ Tested
Visit associative-array keys in a stable order
Bash Scripts: Associative arrays have no defined iteration order, so sort their keys explicitly.
Bash Scripts✓ Tested
Calculate a SHA-256 checksum
Calculate a file checksum so you can compare it with a hash from a trusted source and detect changed contents.
checksum✓ 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