Results for “open file”
Small, practical examples. Search by task or narrow things down below.
Calculate a file’s SHA-256 digest
PowerShell: Get-FileHash hashes bytes without requiring the caller to load the whole file.
PowerShell✓ Tested
Check a filename suffix
Java: Use endsWith for a case-sensitive literal suffix test.
Java✓ Tested
Check a literal filename suffix
C: Check lengths before subtracting so a short input cannot produce an invalid pointer.
C✓ Tested
Check that a file is present and nonempty
Test file content availability before reading it.
file check✓ Tested
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
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
Classify a filename with shell patterns
Bash Scripts: Case patterns support alternatives without launching an external regex tool.
Bash Scripts✓ Tested
Compress a file and keep the original
Create a gzip-compressed copy of a file while leaving the uncompressed original in place.
gzip✓ Tested
Compress a stream to a chosen filename
Linux Commands: Use gzip -c to leave the source file untouched and choose the destination explicitly.
Linux Commands✓ Tested
Confirm the root filesystem rejects writes
Docker / Compose: A read-only root prevents creating files outside writable mounts.
Docker / Compose✓ Tested
Copy a file and inspect the copied byte count
Copy a file and inspect the copied byte count in a complete Rust program using the standard library.
Rust✓ Tested
Copy a file and preserve its metadata
Python: Use copy2 for a file copy that also attempts to preserve timestamps and permission bits.
Python✓ Tested