Results for “IN”
Small, practical examples. Search by task or narrow things down below.
Check whether input is a nonnegative integer
Reject empty input and nonnumeric characters before arithmetic.
validation✓ Tested
Check whether text contains a phrase
Use a case-sensitive Java substring check.
Java✓ Tested
Check whether text ends with a suffix
JavaScript: Use endsWith for a literal case-sensitive ending.
JavaScript✓ Tested
Check whether text ends with a suffix
TypeScript: Use endsWith for a literal case-sensitive ending.
TypeScript✓ Tested
Check whether text is valid JSON
Reject malformed input before processing it.
json_valid✓ Tested
Check whether text starts with a prefix
JavaScript: Use startsWith for a literal case-sensitive prefix comparison.
JavaScript✓ Tested
Check whether text starts with a prefix
TypeScript: Use startsWith for a literal case-sensitive prefix comparison.
TypeScript✓ 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
Choose a branch with if and else
Choose a branch with if and else using a complete Go program with explicit sample inputs.
Go✓ Tested
Choose a different image for a small viewport
HTML: Picture evaluates source media conditions before falling back to the img source.
HTML✓ Tested
Choose a list-marker style
CSS: Learn how to choose a list-marker style in a complete browser example.
CSS✓ Tested
Choose a local file through a labeled control
HTML: A file input exposes selected file metadata to the page without providing arbitrary filesystem access.
HTML✓ Tested