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required    音标拼音: [rikw'ɑɪɚd] [rikw'ɑɪrd]
所要求的

所要求的

required
需求

required
adj 1: necessary for relief or supply; "provided them with all
things needful" [synonym: {needed}, {needful}, {required},
{requisite}]
2: required by rule; "in most schools physical education is
compulsory"; "attendance is mandatory"; "required reading"
[synonym: {compulsory}, {mandatory}, {required}]

Require \Re*quire"\ (r?-kw?r"), v. t. [imp. & p. p. {Required}
(-kw?rd"); p. pr. & vb. n. {Requiring}.] [OE. requeren,
requiren, OF. requerre, F. requ?rir; L. pref. re- re-
quaerere to ask; cf. L. requirere. See {Query}, and cf.
{Request}, {Requisite}.]
1. To demand; to insist upon having; to claim as by right and
authority; to exact; as, to require the surrender of
property.
[1913 Webster]

Shall I say to Caesar
What you require of him? --Shak.
[1913 Webster]

By nature did what was by law required. --Dryden.
[1913 Webster]

2. To demand or exact as indispensable; to need.
[1913 Webster]

Just gave what life required, and gave no more.
--Goldsmith.
[1913 Webster]

The two last [biographies] require to be
particularly noticed. --J. A.
Symonds.
[1913 Webster]

3. To ask as a favor; to request.
[1913 Webster]

I was ashamed to require of the king a band of
soldiers and horsemen to help us against the enemy
in the way. --Ezra viii.
22.
[1913 Webster]

Syn: To claim; exact; enjoin; prescribe; direct; order;
demand; need.
[1913 Webster]


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  • Why were `required` and `optional` removed in Protocol Buffers 3?
    I noticed that required and optional have been removed in the new syntax Why were required optional removed in proto3? Such keywords introduce constraints which should improve robustness
  • validation - How to Indicate Required Fields? - Stack Overflow
    Source: Form fields — Required vs Optional by Jordane Sanson Why use optional fields is always better than required : An asterisk is obvious to you, not to everyone, believe me, there are always some who do not understand The red asterisks make users more fearful, it increases the risk of errors and reduces the form completion rate
  • html - required or required = required - Stack Overflow
    Required This attribute specifies that the user must fill in a value before submitting a form It cannot be used when the type attribute is hidden, image, or a button type (submit, reset, or button) The :optional and :required CSS pseudo-classes will be applied to the field as appropriate MDN
  • Can I apply the required attribute to lt;select gt; fields in HTML?
    The required attribute is a boolean attribute When specified, the user will be required to select a value before submitting the form If a select element has a required attribute specified, does not have a multiple attribute specified, and has a display size of 1 (do not have SIZE=2 or more - omit it if not needed);
  • . net - required vs [Required] in C# 11 - Stack Overflow
    Agreed [Required] is for data validation and in many cases work with ef, and required keyword is c# general
  • Use CSS to automatically add required field asterisk to form inputs
    What you need is :required selector - it will select all fields with 'required' attribute (so no need to add any additional classes) Then - style inputs according to your needs
  • How do I make a field required in HTML? - Stack Overflow
    Find out how to make a field required in HTML forms using the "required" attribute and ensure proper validation for user inputs
  • How to set HTML5 required attribute in Javascript?
    edName attributes required = [object Attr] That's because required in that code is an attribute object, not a string; attributes is a NamedNodeMap whose values are Attr objects To get the value of one of them, you'd look at its value property But for a boolean attribute, the value isn't relevant; the attribute is either present in the map (true) or not present (false) So if required weren't
  • Using the HTML5 required attribute for a group of checkboxes?
    When using the newer browsers that support HTML5 (FireFox 4 for example); and a form field has the attribute required='required'; and the form field is empty blank; and the submit button is clicked
  • How to use the required attribute with a radio input field
    1022 TL;DR: Set the required attribute for at least one input of the radio group Setting required for all inputs is more clear, but not necessary (unless dynamically generating radio-buttons) To group radio buttons they must all have the same name value This allows only one to be selected at a time and applies required to the whole group





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