Results for “required”
Small, practical examples. Search by task or narrow things down below.
Calculate the number of required pages
Python: Use integer arithmetic to round a nonnegative count up to a positive page size.
Python✓ Tested
Check whether all required keys exist
Python: Compare the required key set with a dictionary key view.
Python✓ Tested
Expose a required field’s validity
Expose a required field’s validity with a standalone Angular component and explicit browser behavior.
Angular✓ Tested
Reject a missing required configuration value
Bash Scripts: Check a required value explicitly and emit a controlled diagnostic before exiting.
Bash Scripts✓ Tested
Use native required-field validation
Use native required-field validation with a small React component and explicit browser behavior.
React✓ Tested
Validate a required argument
Java: Use requireNonNull with a useful message at an API boundary.
Java✓ Tested
Require a checkbox to be selected
HTML: A required checkbox is invalid until that individual control is checked.
HTML✓ Tested
Require a form field
HTML: Learn how to require a form field in a complete browser example.
HTML✓ Tested
Require a nonempty text value
HTML: The required attribute makes an empty text control fail native constraint validation.
HTML✓ Tested
Require an input value
Require an input value with a standalone Angular component and explicit browser behavior.
Angular✓ Tested
Append a line to a file
Add a new line to the end of a text file without replacing its existing contents. Append mode also creates the file if it does not exist.
file✓ Tested
Calculate a SHA-256 checksum
Calculate a file checksum so you can compare it with a hash from a trusted source and detect changed contents.
checksum✓ Tested