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Small, practical examples. Search by task or narrow things down below.
Create an empty practice file
Linux Commands: Create an empty practice file using GNU/Linux commands in an empty practice directory.
Linux Commands✓ Tested
Create private files with a restrictive umask
Linux Commands: Apply umask in a subshell so the surrounding shell is unaffected.
Linux Commands✓ Tested
Decode a 16-bit big-endian integer
C: Promote bytes to an unsigned integer type before combining shifted values.
C✓ Tested
Determine whether a year is a leap year
Python: Use calendar.isleap rather than a simplified divisibility-by-four check.
Python✓ Tested
Distinguish staged changes from working edits
Git: Distinguish staged changes from working edits inside the disposable repository created by the input setup.
Git✓ Tested
Encode and decode binary data as Base64
Python: Use Base64 when a text format must carry bytes; it is encoding, not encryption.
Python✓ Tested
Encode and decode UTF-8 text with Base64
PowerShell: Convert the string to bytes explicitly before Base64 encoding.
PowerShell✓ Tested
Enter and leave a practice directory
Linux Commands: Enter and leave a practice directory using GNU/Linux commands in an empty practice directory.
Linux Commands✓ Tested
Exclude a directory from a recursive search
Linux Commands: Use prune to avoid descending into generated dependencies.
Linux Commands✓ Tested
Exclude a purely decorative image from accessible content
HTML: An empty alt indicates that this image adds no information beyond nearby content.
HTML✓ Tested
Exclude generated files from an archive
Linux Commands: Place exclude options before the input paths to control archive membership.
Linux Commands✓ Tested
Exclude matching lines
Linux Commands: Use grep -v to retain lines that do not start with a comment marker.
Linux Commands✓ Tested