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Small, practical examples. Search by task or narrow things down below.
Enumerate Unicode code points
C#: EnumerateRunes combines surrogate pairs into Unicode scalar values.
C#✓ Tested
Escape text for HTML content
Python: Use html.escape before placing plain text in an HTML text or quoted attribute context.
Python✓ Tested
Extract a substring with an explicit count
C++: The second substr argument is a length rather than an ending index.
C++✓ Tested
Extract a substring with range syntax
C#: C# range ends are exclusive; indices operate on UTF-16 code units.
C#✓ Tested
Extract all integer tokens from text
C#: Enumerate Match objects returned by Regex.Matches with an explicit timeout.
C#✓ Tested
Extract named regex fields
Python: Use named capture groups to parse a known date-shaped identifier.
Python✓ Tested
Extract successive regex matches
Java: Use a Matcher loop to find all unsigned integer tokens in Java text.
Java✓ Tested
Extract text between known positions
Java: Java substring uses a start-inclusive, end-exclusive range of UTF-16 indices.
Java✓ Tested
Find the number of days in a month
PowerShell: DaysInMonth handles leap-year February correctly.
PowerShell✓ Tested
Format a bounded duration as hours minutes and seconds
PowerShell: TimeSpan can format duration components with escaped separators.
PowerShell✓ Tested
Generate and measure a short output pulse
Arduino / C: delayMicroseconds can create a short blocking pulse on an output pin.
Arduino / C✓ Tested
Include a nonvisible value in form data
HTML: A named hidden input contributes data without adding a visible editing control.
HTML✓ Tested