Results for “type guard”
Small, practical examples. Search by task or narrow things down below.
Generate a bounded sequence recursively
Use a recursive CTE with a recursion limit.
recursive CTE✓ Tested
Give an optional property a default
Handle missing object fields with nullish coalescing.
optional✓ Tested
Handle a result with a discriminated union
Separate success data from an error message.
discriminated union✓ Tested
Handle a terminating error
Catch conversion failures and produce a clear fallback.
try catch✓ Tested
Identify whether a name resolves to a builtin
Bash Scripts: type -t reports the command kind without printing a machine-specific path.
Bash Scripts✓ Tested
Limit a search to the immediate directory
Linux Commands: Use maxdepth with type f to exclude nested files and directories.
Linux Commands✓ Tested
Mirror input text
Update a result as the user types using a jQuery input event.
jQuery✓ Tested
Mount a local input directory with long syntax
Docker / Compose: Long mount syntax makes the bind type and read-only intent explicit.
Docker / Compose✓ Tested
Pass a function as a callback
C: A typed function pointer permits behavior to be supplied to another function.
C✓ Tested
Protect a shared container with a mutex
C++: A scoped lock_guard releases the mutex when its scope ends.
C++✓ Tested
Raise and catch a domain-specific exception
Python: Give a validation failure its own exception type so callers can handle it narrowly.
Python✓ Tested
Read a nested optional value
Avoid dereferencing a missing nested object.
optional chaining✓ Tested