Results for “work in progress”
Small, practical examples. Search by task or narrow things down below.
Use a fallback for an unset variable
Bash Scripts: Use a fallback for an unset variable with a small standalone Bash program.
Bash Scripts✓ Tested
Use a function’s exit status as a boolean result
Bash Scripts: Return zero for success and test the function directly in a conditional.
Bash Scripts✓ Tested
Use a nonnegative remainder for cyclic indexing
Use a nonnegative remainder for cyclic indexing in a complete Rust program using the standard library.
Rust✓ Tested
Use a recursive function for a bounded calculation
Bash Scripts: A recursive factorial demonstrates local variables and a clear base case.
Bash Scripts✓ Tested
Use an alternate value only when a variable is nonempty
Bash Scripts: The colon-plus expansion returns its word only when the parameter has a nonempty value.
Bash Scripts✓ Tested
Use an associated constructor
Use an associated constructor in a complete Rust program using the standard library.
Rust✓ Tested
Use if to produce a value
Use if to produce a value in a complete Rust program using the standard library.
Rust✓ Tested
Validate the number of positional arguments
Bash Scripts: Use the argument count to enforce a simple command-line contract.
Bash Scripts✓ Tested
Validate UTF-8 bytes
Validate UTF-8 bytes using a complete Go program with explicit sample inputs.
Go✓ 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
Visit selected elements
Use jQuery each to label every item with its one-based position.
jQuery✓ Tested
Wait for a background job before reading its output
Bash Scripts: Save the job PID and wait explicitly before consuming files it produces.
Bash Scripts✓ Tested