How about 

    &lt;input type=&quot;text&quot; pattern=&quot;[789][0-9]{9}&quot;&gt;

How about this? `/(7|8|9)\d{9}/`

It starts by either looking for 7 or 8 or 9, and then followed by 9 digits.

The regex validation for india should make sure that +91 is used, then make sure that 7, 8,9  is used after +91 and finally followed by 9 digits.

&lt;code&gt;/^\+91(7\d|8\d|9\d)\d{9}$/&lt;/code&gt;

Your original regex doesn&#39;t require a &quot;+&quot; at the front though.
--
&lt;code&gt;Get the more information from below link&lt;/code&gt; &lt;br/&gt;
[w3schools.com/jsref/jsref_obj_regexp.asp][1]


  [1]: http://w3schools.com/jsref/jsref_obj_regexp.asp

Try this code:

    &lt;input type=&quot;text&quot; name=&quot;Phone Number&quot; pattern=&quot;[7-9]{1}[0-9]{9}&quot; 
           title=&quot;Phone number with 7-9 and remaing 9 digit with 0-9&quot;&gt;

This code will inputs only in the following format:

9238726384 (starting with 9 or 8 or 7 and other 9 digit using any number) &lt;br/&gt;
8237373746 &lt;br/&gt;
7383673874

*Incorrect format:* &lt;br/&gt;
2937389471(starting not with 9 or 8 or 7) &lt;br/&gt;
32796432796(more than 10 digit) &lt;br/&gt;
921543(less than 10 digit)


This code will accept all country code with + sign

    &lt;input type=&quot;text&quot; pattern=&quot;[0-9]{5}[-][0-9]{7}[-][0-9]{1}&quot;/&gt;


Some countries allow a single &quot;0&quot; character instead of &quot;+&quot; and others a double &quot;0&quot; character instead of the &quot;+&quot;. Neither are standard.

Improving [@JamesPlayer][1]&#39;s answer:


  [1]: https://stackoverflow.com/a/19611675/8444348

Since now in India, a new series of phone numbers started with `6`. Use this &#128071;

    &lt;input type=&quot;text&quot; pattern=&quot;[6789][0-9]{9}&quot;&gt;

To show a custom error message, use the `title` attribute.

    &lt;input type=&quot;text&quot; pattern=&quot;[6789][0-9]{9}&quot; title=&quot;Please enter valid phone number&quot;&gt;

That&#39;s all folks. &#127881;

[![enter image description here][1]][1]
## ^[789]\d{9,9}$ ##

- Minimum digits 10
- Maximum digits 10
- number starts with 7,8,9


  [1]: https://i.stack.imgur.com/mh8kX.png

Is there a standard way (without installing third party libraries) to do cross platform filesystem mocking in Python? If I have to go with a third party library, which library is the standard?

How do I mock the filesystem in Python unit tests?

I have a REST services to document,
some of them accepts simple array like:

	[
	  { &quot;name&quot;:&quot;a&quot; },
	  { &quot;name&quot;:&quot;b&quot; },
	  { &quot;name&quot;:&quot;c&quot; }
	]

How do I describe this in Swagger model section ? I can only create &#39;named array&#39; like

    model {
    properties: { &quot;arr&quot;: { &quot;type&quot;:&quot;array&quot;, ......

but it describes data like this:

	&quot;arr&quot;: [
	  { &quot;name&quot;:&quot;a&quot; },
	  { &quot;name&quot;:&quot;b&quot; },
	  { &quot;name&quot;:&quot;c&quot; }
	]


How to describe a model in Swagger for an array with simple objects?

I&#39;m using HTML5 form validation to validate phone numbers from India.

Phone numbers from India are 10 digits long, and start with 7, 8, or 9.

For example:

 1. 7878787878
 2. 9898989898
 3. 8678678878

These phone numbers are valid, but 

 1. 1212121212
 2. 3434545464
 3. 6545432322

are invalid.

Suggest a pattern that can detect valid India phone numbers.

So far, my pattern is `[0-9]{10}`, but it doesn&#39;t check if the first digit is 7, 8, or 9.

HTML5 phone number validation with pattern

I'm using HTML5 form validation to validate phone numbers from India.
Phone numbers from India are 10 digits long, and start with 7, 8, or 9.
For example:
<ol>
<li>7878787878</li>
<li>9898989898</li>
<li>8678678878</li>
</ol>
These phone numbers are valid, but
<ol>
<li>1212121212</li>
<li>3434545464</li>
<li>6545432322</li>
</ol>
are invalid.
Suggest a pattern that can detect valid India phone numbers.
So far, my pattern is <code>[0-9]{10}</code>, but it doesn't check if the first digit is 7, 8, or 9.

Without using any forms whatsoever, can I just send a file/files from `&lt;input type=&quot;file&quot;&gt;` to &#39;upload.php&#39; using POST method using jQuery. The input tag is not inside any form tag. It stands individually. So I don&#39;t want to use jQuery plugins like &#39;ajaxForm&#39; or &#39;ajaxSubmit&#39;.

File Upload without Form

I have the following input tag in my html5 form:

    &lt;p&gt;
        &lt;label&gt;Company Name*&lt;/label&gt;
        &lt;input type=&quot;text&quot; name=&quot;name&quot; class=&quot;field&quot; required pattern=&quot;[a-zA-Z0-9]+&quot; /&gt;
    &lt;/p&gt;

This works just fine checking if the company name consists out of alphanumeric characters. But of course I want to allow spaces in the company name. I need to know what I should add to the pattern.

HTML5 form validation pattern alphanumeric with spaces?

I have some code here that will do the following. The code creates an element &quot;p&quot; then I append it to a &quot;div&quot; in the HTML. I would like that &quot;p&quot; I just created have an unique identifier (ID) and set the name of the ID. So later on when the user wants to delete the last created element it will be able to get the ID so it can removeChild. Here is the code:

JavaScript:

      var $ = function (id)
      {
          return document.getElementById(id);
      }

      function ShowResponse ()
      {
      var myResponse = $(&quot;myresponse&quot;).value;

      var myPara = document.createElement(&quot;p&quot;);
      var myDiv = $(&quot;mydiv&quot;);
      myDiv.appendChild(myPara);

      var myID = document.createElement(&quot;id&quot;);
      myID.setAttribute(&quot;value&quot;, ID)

      var myText = document.createTextNode(myResponse);
      myPara.appendChild(myText);
      }

      function RemoveResponse ()
      {

      }

      window.onload = function ()
      {
          $(&quot;showresponse&quot;).onclick = ShowResponse;
          $(&quot;removeresponse&quot;).onclick = RemoveResponse;
      }

HTML:

      &lt;body&gt;
      &lt;div id=&quot;mydiv&quot;&gt;
      &lt;h1&gt;Practice&lt;/h1&gt;

      &lt;p&gt;Hi There&lt;/p&gt;
      &lt;p&gt;How are you?&lt;/p&gt;

      &lt;p&gt;
	&lt;input type=&quot;text&quot; id=&quot;myresponse&quot;&gt;
	&lt;br&gt;&lt;input type=&quot;button&quot; id=&quot;showresponse&quot; value=&quot;Show Response&quot;&gt;
	&lt;input type=&quot;button&quot; id=&quot;removeresponse&quot; value=&quot;Remove Response&quot;&gt;
      &lt;/p&gt;

      &lt;hr&gt;
     &lt;/div&gt;

     &lt;/body&gt;

JavaScript Adding an ID attribute to another created Element

Is there any way to set a default image that appears when I share my website on Facebook? I&#39;ve noticed that Facebook usually fetches the first image from the site to use as a thumbnail.

Default website image for social sharing

I have used the &lt;iframe&gt; tag to embed a pdf file. 

    &lt;iframe id=&quot;iframepdf&quot; src=&quot;files/example.pdf&quot;&gt;&lt;/iframe&gt;

This works fine in Chrome, IE8+, Firefox etc, but for some reason, when some people are viewing it in IE8, the files are downloading instead of embedding. I know this browser is outdated but it is the standard browser within my office and as such, the website has to be designed for this. 

Does anyone have any ideas on why this is happening, how I can fix it or else put an error message instead of letting the files download?


HTML embedded PDF iframe

In Java, I could use the following function to check if a string is a valid regex ([source](https://stackoverflow.com/questions/6341367/how-to-check-if-the-string-is-a-regular-expression-or-not)):

    boolean isRegex;
    try {
      Pattern.compile(input);
      isRegex = true;
    } catch (PatternSyntaxException e) {
      isRegex = false;
    }

Is there a Python equivalent of the `Pattern.compile()` and `PatternSyntaxException`? If so, what is it?

How to check if a string is a valid regex in Python?

I&#39;ve read several articles and StackOverflow questions relating to the setting of focus in AngularJs.

Unfortunately all the examples that I have read assume that there is some attribute that I can add to the element to gain focus, e.g. a [focusMe directive][1].

However what if I don&#39;t know in advance which input to set focus to? In particular how do I set focus to the first input element in a form that has $invalid set - i.e. an element that fails validation.  There could be several inputs that fail validation, so I cannot use a directive that just tries to call .focus() based on this.  (I am doing this for Accessibility/WCAG reasons, its good practice to do so on submit being clicked to minimize keypresses to find the first field that has failed validation).

The $error object will give all controls that fail validation, but they are grouped by the type of failure not in any order of appearance on the form.

I&#39;m sure I can come up with some kludged way of doing this. A directive on the form, which receives some broadcast when focus needs to be set - that directive can then search for the first $invalid element.  However this seems very complex and I&#39;d like to know whether these is a better more &#39;angular&#39; way of doing this.



  [1]: https://stackoverflow.com/questions/14833326/how-to-set-focus-in-angularjs

Set focus on first invalid input in AngularJs form

I have this **model**

    public class Person
    {
        public int Id { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }  
    }
I want to create a validation where either FirstName or LastName must be filled in by user.
I installed `FluentValidation` and created a **customvalidator class**

    public class PersonValidator:AbstractValidator&lt;Person&gt;
    {
        public PersonValidator()
        {
            RuleFor((person=&gt;person.FirstName)//don&#39;t know how to check if one is empty
        }
    }
To check just one field I could just do `RuleFor(person =&gt; person.FirstName).NotNull();`

But how do I check if one of them is null.

Also, is it possible, once validation is created via `fluentValidation`, use it on the client side to show error?

**Edit1**

        protected void Application_Start()
        {
            AreaRegistration.RegisterAllAreas();

            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
            BundleConfig.RegisterBundles(BundleTable.Bundles);
            FluentValidationModelValidatorProvider.Configure();
        }
    //creating validation
    namespace WebApplication1.Models.CustomValidator
    {
        public class PersonValidator:AbstractValidator&lt;Person&gt;
        {
            public PersonValidator()
            {
                RuleFor(m =&gt; m.FirstName).NotEmpty().When(m =&gt; string.IsNullOrEmpty(m.LastName)).WithMessage(&quot;*Either First Name or Last Name is required&quot;);
                RuleFor(m =&gt; m.LastName).NotEmpty().When(m =&gt; string.IsNullOrEmpty(m.FirstName)).WithMessage(&quot;*Either First Name or Last Name is required&quot;);
            }
        }
        
    }
    //model class
    [Validator(typeof(PersonValidator))]
    public class Person
    {
        public Person()
        {
            InterestList = new List&lt;string&gt;();
        }
        public int Id { get; set; }
        public int ContactId { get; set; }
        [RequiredIfEmpty(&quot;LastName&quot;)]
        public string FirstName { get; set; }
        [RequiredIfEmpty(&quot;FirstName&quot;)]
        public string LastName { get; set; }
        public string EmailAddress { get; set; }
        public string Phone { get; set; }
        public string Country { get; set; }
        public List&lt;string&gt; InterestList { get; set; } 
    }
    //view
    @model WebApplication1.Models.Person

    &lt;script src=&quot;@Url.Content(&quot;~/Scripts/jquery-1.8.2.min.js&quot;)&quot;&gt;&lt;/script&gt;
    &lt;script src=&quot;@Url.Content(&quot;~/Scripts/jquery.validate.min.js&quot;)&quot;&gt;&lt;/script&gt;
    &lt;script src=&quot;@Url.Content(&quot;~/Scripts/jquery.validate.unobtrusive.min.js&quot;)&quot;&gt;&lt;/script&gt;
    &lt;script src=&quot;@Url.Content(&quot;~/Scripts/jquery.unobtrusive-ajax.min.js&quot;)&quot; type=&quot;text/javascript&quot;&gt;&lt;/script&gt;
    
    @Html.ValidationSummary(true)
    @using(Html.BeginForm(&quot;AddPerson&quot;,&quot;Person&quot;,FormMethod.Post))
    {
        &lt;div class=&quot;label&quot;&gt;First Name&lt;/div&gt;
        &lt;div class=&quot;input-block-level&quot;&gt;@Html.TextBoxFor(m=&gt;m.FirstName)@Html.ValidationMessageFor(m=&gt;m.FirstName)&lt;/div&gt;
        &lt;br/&gt;
        &lt;div class=&quot;label&quot;&gt;Last Name&lt;/div&gt;
        &lt;div class=&quot;input-block-level&quot;&gt;@Html.TextBoxFor(m=&gt;m.LastName)@Html.ValidationMessageFor(m=&gt;m.LastName)&lt;/div&gt;
        &lt;button type=&quot;submit&quot; class=&quot;btn-primary&quot;&gt;Submit&lt;/button&gt;
    }

FluentValidation: Check if one of two fields are empty

I am trying to call my JS function that I added in the header. 
Please find below code that shows my problem scenario. 
Note: I don&#39;t have access to the body in my application. 
Everytime I click on the element with `id=&quot;Save&quot;` it only calls `f1()` but not `fun()`. How can I make it call even my `fun()`?
Please help.


      &lt;!DOCTYPE html&gt;
      &lt;html&gt;
      &lt;head&gt;
    
      &lt;script&gt;
	
	   document.getElementById(&quot;Save&quot;).onclick = function fun()
        {
         alert(&quot;hello&quot;);
         //validation code to see State field is mandatory.  
        }	

        function f1()
        {
           alert(&quot;f1 called&quot;);
	       //form validation that recalls the page showing with supplied inputs. 	
        }
	
      &lt;/script&gt;
      &lt;/head&gt;
      &lt;body&gt;
      &lt;form name=&quot;form1&quot; id=&quot;form1&quot; method=&quot;post&quot;&gt;
                State: 
                &lt;select id=&quot;state ID&quot;&gt;
                   &lt;option&gt;&lt;/option&gt;
                   &lt;option value=&quot;ap&quot;&gt;ap&lt;/option&gt;
                   &lt;option value=&quot;bp&quot;&gt;bp&lt;/option&gt;
                &lt;/select&gt;
       &lt;/form&gt;
   
       &lt;table&gt;&lt;tr&gt;&lt;td id=&quot;Save&quot; onclick=&quot;f1()&quot;&gt;click&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;

       &lt;/body&gt;
       &lt;/html&gt;


Content Type	Original Author	Original Content on Stackoverflow
Question	Manwal	View Question on Stackoverflow
Solution 1 - Html	JamesPlayer	View Answer on Stackoverflow
Solution 2 - Html	itsmikem	View Answer on Stackoverflow
Solution 3 - Html	Shailendr singh	View Answer on Stackoverflow
Solution 4 - Html	thejustv	View Answer on Stackoverflow
Solution 5 - Html	manish1706	View Answer on Stackoverflow
Solution 6 - Html	Darshan Gada	View Answer on Stackoverflow
Solution 7 - Html	bunny	View Answer on Stackoverflow

HTML5 phone number validation with pattern

Html Problem Overview

Html Solutions

Solution 1 - Html

Solution 2 - Html

Solution 3 - Html

Your original regex doesn't require a "+" at the front though.

Solution 4 - Html

Solution 5 - Html

Solution 6 - Html

Solution 7 - Html

^[789]\d{9,9}$

How to describe a model in Swagger for an array with simple objects?

How do I mock the filesystem in Python unit tests?

Attributions