query: Require input if there are any
positive_passages.docid: 145867
positive_passages.text: A required field that isn't really required?
negative_passages.docid: 69957
negative_passages.text: When is "self" required?
negative_passages.docid: 61578
negative_passages.text: The proper way to write the input for a certain series
negative_passages.docid: 131654
negative_passages.text: LaTeX \if condition
negative_passages.docid: 62160
negative_passages.text: Conditional Statements: "only if"
negative_passages.docid: 118643
negative_passages.text: Validating input using java.util.Scanner
negative_passages.docid: 27025
negative_passages.text: How do I choose an element from a non-empty set?
negative_passages.docid: 74098
negative_passages.text: In Python, is there a way to validate a user input in a certain format?
negative_passages.docid: 39045
negative_passages.text: uncertain number of inputs for my function
negative_passages.docid: 11663
negative_passages.text: Checking a list if a certain string exist in visualforce page
negative_passages.docid: 53203
negative_passages.text: Checking for undefined
negative_passages.docid: 37350
negative_passages.text: checking each required input for empty value with jQuery
negative_passages.docid: 36779
negative_passages.text: How to make a field required to enter a specific number?
negative_passages.docid: 16124
negative_passages.text: Use of "If there is/are"
negative_passages.docid: 134416
negative_passages.text: have to / must / should / ought as applied to inanimate objects
negative_passages.docid: 114378
negative_passages.text: How to check if the string is empty?
negative_passages.docid: 98778
negative_passages.text: Use second argument for optional first argument if not provided in macro