You should use the `&lt;see langword=&quot;true&quot;/&gt;` entry so that it works right for whatever language is being used.


Per GhostDoc&#39;s behavior, `&lt;c&gt;true&lt;/c&gt;` is the correct answer. I&#39;ve voted up saravanan&#39;s comment now that I&#39;ve been able to confirm it.

Dropbox makes it easy to programmatically download a single file via curl (EX: `curl -O https://dl.dropboxusercontent.com/s/file.ext`). It is a little bit trickier for a folder (regular directory folder, not zipped). The shared link for a folder, as opposed to a file, does not link directly to the zipped folder (Dropbox automatically zips the folder before it is downloaded). It would appear that you could just add `?dl=1` to the end of the link, as this will directly start the download in a browser. This, however, points to an intermediary html document that redirects to the actual zip folder and does not seem to work with curl. Is there anyway to use curl to download a folder via a shared link? I realize that the best solution would be to use the Dropbox api, but for this project it is important to keep it as simple as possible. Additionally, the solution must be incorporated into a bash shell script.

Use curl to download a Dropbox folder via shared link (not public link)

I want to send Following ArrayList from one activity to another please help.

    ContactBean m_objUserDetails = new ContactBean();
    ArrayList&lt;ContactBean&gt; ContactLis = new ArrayList&lt;ContactBean&gt;(); 
I am sending the above arraylist after adding data in it as follows

      Intent i = new Intent(this,DisplayContact.class);
      i.putExtra(&quot;Contact_list&quot;, ContactLis);
      startActivity(i);

But I am getting problem while recovering it.

    ArrayList&lt;ContactBean&gt; l1 = new ArrayList&lt;ContactBean&gt;();
    Bundle wrapedReceivedList = getIntent().getExtras();
    l1= wrapedReceivedList.getCharSequenceArrayList(&quot;Contact_list&quot;);

At this point I am getting this error:

    Type mismatch: cannot convert from ArrayList&lt;CharSequence&gt; to ArrayList&lt;ContactBean&gt;

My ContactBean class implements Serializable please also tell why we have to implement serializable interface.

How to pass ArrayList&lt;CustomeObject&gt; from one activity to another?

Which C# XML documentation comment tag is used for the literals `true`, `false` and `null`?

In Microsoft&#39;s own documentation, these literals appear in **bold text**. For example, the documentation for the property [ArrayList.IsFixedSize][1] appears as:

&gt; **true** if the [ArrayList][2] has a fixed size; otherwise, **false**. The default is **false**.

None of [Microsoft&#39;s Recommended Tags][3] seem to apply to this situation. The best fit appears to be [&amp;lt;c&amp;gt;][4], however `&lt;c&gt;true&lt;/c&gt;` appears as `true` when the documentation is rendered by [Doxygen][5].

However, using `&lt;b&gt;true&lt;/b&gt;` with Doxygen yielded bold text as I surmised that it might. But that leaves me wondering about **the portability of using standard HTML tags** with other documentation generation tools such as [Sandcastle][6] and [GhostDoc][7].


  [1]: http://msdn.microsoft.com/en-us/library/system.collections.arraylist.isfixedsize%28v=vs.110%29.aspx
  [2]: http://msdn.microsoft.com/en-us/library/System.Collections.ArrayList%28v=vs.110%29.aspx
  [3]: http://msdn.microsoft.com/en-us/library/5ast78ax.aspx
  [4]: http://msdn.microsoft.com/en-us/library/te6h7cxs%28v=vs.120%29.aspx
  [5]: http://www.doxygen.nl/
  [6]: http://shfb.codeplex.com/
  [7]: http://www.roland-weigelt.de/ghostdoc/

Which C# XML documentation comment tag is used for &#39;true&#39;, &#39;false&#39; and &#39;null&#39;?

Which C# XML documentation comment tag is used for the literals <code>true</code>, <code>false</code> and <code>null</code>?
In Microsoft's own documentation, these literals appear in bold text. For example, the documentation for the property <a href="http://msdn.microsoft.com/en-us/library/system.collections.arraylist.isfixedsize%28v=vs.110%29.aspx" target="_blank" rel="noopener noreferrer">ArrayList.IsFixedSize</a> appears as:
> true if the <a href="http://msdn.microsoft.com/en-us/library/System.Collections.ArrayList%28v=vs.110%29.aspx" target="_blank" rel="noopener noreferrer">ArrayList</a> has a fixed size; otherwise, false. The default is false.
None of <a href="http://msdn.microsoft.com/en-us/library/5ast78ax.aspx" target="_blank" rel="noopener noreferrer">Microsoft's Recommended Tags</a> seem to apply to this situation. The best fit appears to be <a href="http://msdn.microsoft.com/en-us/library/te6h7cxs%28v=vs.120%29.aspx" target="_blank" rel="noopener noreferrer">&#x3C;c></a>, however <code>&#x3C;c>true&#x3C;/c></code> appears as <code>true</code> when the documentation is rendered by <a href="http://www.doxygen.nl/" target="_blank" rel="noopener noreferrer">Doxygen</a>.
However, using <code>&#x3C;b>true&#x3C;/b></code> with Doxygen yielded bold text as I surmised that it might. But that leaves me wondering about the portability of using standard HTML tags with other documentation generation tools such as <a href="http://shfb.codeplex.com/" target="_blank" rel="noopener noreferrer">Sandcastle</a> and <a href="http://www.roland-weigelt.de/ghostdoc/" target="_blank" rel="noopener noreferrer">GhostDoc</a>.

How do you convert an image from a path on the user&#39;s computer to a base64 string in C#?

For example, I have the path to the image (in the format `C:/image/1.gif`) and would like to have a data URI like `data:image/gif;base64,/9j/4AAQSkZJRgABAgEAYABgAAD..` representing the `1.gif` image returned.

Convert an image (selected by path) to base64 string

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using Facebook;
    using Newtonsoft.Json;
    
    namespace facebook
    {
        class Program
        {
            static void Main(string[] args)
            {
                var client = new FacebookClient(acc_ess);
                dynamic result = client.Get(&quot;fql&quot;, new { q = &quot;select target_id,target_type from connection where source_id = me()&quot;});
                string jsonstring = JsonConvert.SerializeObject(result);
    
                //jsonstring {&quot;data&quot;:[{&quot;target_id&quot;:9503123,&quot;target_type&quot;:&quot;user&quot;}]}
                List&lt;RootObject&gt; datalist = JsonConvert.DeserializeObject&lt;List&lt;RootObject&gt;&gt;(jsonstring);
            }
            
            public class Datum
            {
                public Int64 target_id { get; set; }
                public string target_type { get; set; }
            }
    
            public class RootObject
            {          
                public List&lt;Datum&gt; data { get; set; }
            }
        }
    }

&gt; Cannot deserialize the current JSON object (e.g. {&quot;name&quot;:&quot;value&quot;})
&gt; into type
&gt; &#39;System.Collections.Generic.List`1[facebook.Program+RootObject]&#39;
&gt; because the type requires a JSON array (e.g. [1,2,3]) to deserialize
&gt; correctly. To fix this error either change the JSON to a JSON array
&gt; (e.g. [1,2,3]) or change the deserialized type so that it is a normal
&gt; .NET type (e.g. not a primitive type like integer, not a collection
&gt; type like an array or List&lt;T&gt;) that can be


I looked at other posts.

My json looks like this:

    {&quot;data&quot;:[{&quot;target_id&quot;:9503123,&quot;target_type&quot;:&quot;user&quot;}]}


Cannot deserialize the current JSON object (e.g. {&quot;name&quot;:&quot;value&quot;}) into type &#39;System.Collections.Generic.List`1

**Problem:**

I have a text file of around **120,000** users (strings) which I would like to store in a collection and later to perform a search on that collection.

The search method will occur every time the user change the text of a `TextBox` and the result should be the strings that ***contain*** the text in `TextBox`.

I don&#39;t have to change the list, just pull the results and put them in a `ListBox`.

**What I&#39;ve tried so far:**

I tried with two different collections/containers, which I&#39;m dumping the string entries from an external text file (once, of course):

 1. `List&lt;string&gt; allUsers;`
 2. `HashSet&lt;string&gt; allUsers;`

With the following [LINQ][1] query:

`allUsers.Where(item =&gt; item.Contains(textBox_search.Text)).ToList();`

My search event (fires when user change the search text):

    private void textBox_search_TextChanged(object sender, EventArgs e)
    {
        if (textBox_search.Text.Length &gt; 2)
        {
            listBox_choices.DataSource = allUsers.Where(item =&gt; item.Contains(textBox_search.Text)).ToList();
        }
        else
        {
            listBox_choices.DataSource = null;
        }
    }

**Results:**

Both gave me a poor response time (around 1-3 seconds between each key press).

**Question:**

Where do you think my bottleneck is? The collection I&#39;ve used? The search method? Both?

How can I get better performance and more fluent functionality?

  [1]: http://en.wikipedia.org/wiki/Language_Integrated_Query


Fastest way to search in a string collection

I need to create a POST method in WebApi so I can send data from application to WebApi method. I&#39;m not able to get header value.

Here I have added header values in the application:

     using (var client = new WebClient())
            {
                // Set the header so it knows we are sending JSON.
                client.Headers[HttpRequestHeader.ContentType] = &quot;application/json&quot;;

                client.Headers.Add(&quot;Custom&quot;, &quot;sample&quot;);
                // Make the request
                var response = client.UploadString(url, jsonObj);
            }
Following the WebApi post method:

     public string Postsam([FromBody]object jsonData)
        {
            HttpRequestMessage re = new HttpRequestMessage();
            var headers = re.Headers;

            if (headers.Contains(&quot;Custom&quot;))
            {
                string token = headers.GetValues(&quot;Custom&quot;).First();
            }
        }

What is the correct method for getting header values?

Thanks.

How to add and get Header values in WebApi

I have a method in ASP.NET application, that consumes quite a lot of time to complete. A call to this method might occur up to 3 times during one user request, depending on the cache state and parameters that user provides. Each call takes about 1-2 seconds to complete. The method itself is synchronous call to the service and there is no possibility to override the implementation.  
So the synchronous call to the service looks something like the following:

    public OutputModel Calculate(InputModel input)
    {
    	// do some stuff
    	return Service.LongRunningCall(input);
    }
And the usage of the method is (note, that call of method may happen more than once):

    private void MakeRequest()
    {
    	// a lot of other stuff: preparing requests, sending/processing other requests, etc.
    	var myOutput = Calculate(myInput);
    	// stuff again
    }
I tried to change the implementation from my side to provide simultaneous work of this method, and here is what I came to so far.

    public async Task&lt;OutputModel&gt; CalculateAsync(InputModel input)
    {
    	return await Task.Run(() =&gt;
    	{
    		return Calculate(input);
    	});
    }
Usage (part of &quot;do other stuff&quot; code runs simultaneously with the call to service):

    private async Task MakeRequest()
    {
    	// do some stuff
    	var task = CalculateAsync(myInput);
    	// do other stuff
    	var myOutput = await task;
    	// some more stuff
    }
My question is the following. Do I use the right approach to speed up the execution in ASP.NET application or am I doing unnecessary job trying to run synchronous code asynchronously? Can anyone explain why the second approach is not an option in ASP.NET (if it is really not)? Also, if such approach is applicable, do I need to call such method asynchronously if it is the only call we might perform at the moment (I have such case, when no other stuff there is to do while waiting for completion)?  
Most of the articles in the net on this topic covers using `async-await` approach with the code, that already provides `awaitable` methods, but that&#39;s not my case. [Here][1] is the nice article describing my case, which doesn&#39;t describe the situation of parallel calls, declining the option to wrap sync call, but in my opinion my situation is exactly the occasion to do it.  
Thanks in advance for help and tips.


  [1]: http://blogs.msdn.com/b/pfxteam/archive/2012/03/24/10287244.aspx

Wrapping synchronous code into asynchronous call

I am creating an EditText in my layout xml file 

But I want to change color line in EditText from Holo to (for example) red.
How that can be done? 

![enter image description here][1]



  [1]: http://i.stack.imgur.com/xF6tW.jpg

How to change line color in EditText

Is it possible to change the datepicker (and also the timepicker) color scheme for Android 5.0?

I&#39;ve tried setting the accent colors, but this doesn&#39;t work (both with and without `android`):

    &lt;!-- colorPrimary is used for the default action bar background --&gt;
    &lt;item name=&quot;colorPrimary&quot;&gt;@color/purple&lt;/item&gt;

    &lt;!-- colorPrimaryDark is used for the status bar --&gt;
    &lt;item name=&quot;colorPrimaryDark&quot;&gt;@color/purple_tint&lt;/item&gt;

    &lt;!-- colorAccent is used as the default value for colorControlActivated
         which is used to tint widgets --&gt;
    &lt;item name=&quot;colorAccent&quot;&gt;@color/purple_tint&lt;/item&gt;

From original:

[![Original][1]][1]

To something like this:

[![Recolored][2]][2]


  [1]: http://i.stack.imgur.com/gsPyb.png
  [2]: https://i.imgur.com/1Zve3jv.png

How to change DatePicker dialog color for Android 5.0

In React Native, `borderRadius` is working but the background color given to the button stays a square. What is going on here?

JS

    &lt;TouchableHighlight
      style={styles.submit}
      onPress={() =&gt; this.submitSuggestion(this.props)}
      underlayColor=&#39;#fff&#39;&gt;
        &lt;Text style={[this.getFontSize(),styles.submitText]}&gt;Submit&lt;/Text&gt;
    &lt;/TouchableHighlight&gt;


Style

    ...
    submit:{
        marginRight:40,
        marginLeft:40,
        marginTop:10,
    },
    submitText:{
        paddingTop:20,
        paddingBottom:20,
        color:&#39;#fff&#39;,
        textAlign:&#39;center&#39;,
        backgroundColor:&#39;#68a0cf&#39;,
        borderRadius: 10,
        borderWidth: 1,
        borderColor: &#39;#fff&#39;
    },
    ...

[![enter image description here][1]][1]


  [1]: http://i.stack.imgur.com/bnzCG.png

React Native Border Radius with background color

My problem, that when I use innererHtml binding  - angular2 remove all styles attributes. It&#39;s important for me, bacause in my task - html is generated on server-side with all styles.
Example:

&lt;!-- language: lang-typescript --&gt;

    @Component({
      selector: &#39;my-app&#39;,
      template: `
        &lt;input type=&quot;text&quot; [(ngModel)]=&quot;html&quot;&gt;
        &lt;div [innerHtml]=&quot;html&quot;&gt;
        &lt;/div&gt;
      `,
    })
    export class App {
      name:string;
      html: string;
      constructor() {
        this.name = &#39;Angular2&#39;
        this.html = &quot;&lt;span style=\&quot;color:red;\&quot;&gt;1234&lt;/span&gt;&quot;;
      }
    }

But in DOM I see only &lt;span&gt;1234&lt;span&gt; and this text is not red.

http://plnkr.co/edit/UQJOFMKl9OwMRIJ38U8D?p=preview

Thank you!

Angular2 innerHtml binding remove style attribute

My component has styles that depend on current datetime. In my component I&#39;ve got the following function.

      private fontColor( dto : Dto ) : string {
        // date d&#39;ex&#233;cution du dto
        let dtoDate : Date = new Date( dto.LastExecution );

		(...)

        let color =  &quot;hsl( &quot; + hue + &quot;, 80%, &quot; + (maxLigness - lightnessAmp) + &quot;%)&quot;;
    
        return color;
      }

`lightnessAmp` is calculated from the current datetime. The color changes if `dtoDate` is in the last 24 hours.

The exact error is the following:

&gt; Expression has changed after it was checked. Previous value: &#39;hsl( 123, 80%, 49%)&#39;. Current value: &#39;hsl( 123, 80%, 48%)&#39;

I know the exception appear in development mode only at the moment the value is checked. If the checked value is different of the updated value, the exception is thrown.

So I tried to update the current datetime at each lifecycle in the following hook method to prevent the exception:

      ngAfterViewChecked()
      {
        console.log( &quot;! changement de la date du composant !&quot; );
        this.dateNow = new Date();
      }

...but without success.

How to manage Angular2 &quot;expression has changed after it was checked&quot; exception when a component property depends on current datetime

In C++ (and C), a floating point literal without suffix defaults to `double`, while the suffix `f` implies a `float`. But what is the suffix to get a `long double`?

Without knowing, I would define, say,

    const long double x = 3.14159265358979323846264338328;

But my worry is that the variable `x` contains fewer significant bits of `3.14159265358979323846264338328` than 64, because this is a `double` literal. Is this worry justified?

What&#39;s the C++ suffix for long double literals?

Just out of curiosity: why can I assign 0.0 to a variable that is of an enumeration type, but not 1.0? Have a look at the following code:

    public enum Foo
    {
        Bar,
        Baz
    }

    class Program
    {
        static void Main()
        {
            Foo value1 = 0.0;
            Foo value2 = 1.0;   // This line does not compile
            Foo value3 = 4.2;   // This line does not compile
        }
    }

I thought that conversions between numerical types and enumeration values are only allowed via casts? That is I could write Foo `value2 = (Foo) 1.0;` so that line 2 in `Main` can compile. Why is there an exception for the value `0.0` in C#? 

Why can I assign 0.0 to enumeration values, but not 1.0

When I tried to add a const array in the global scope using this code:

    static NUMBERS: [i32] = [1, 2, 3, 4, 5];

I got the following error:

    error: mismatched types:
     expected `[i32]`,
        found `[i32; 5]`
    (expected slice,
        found array of 5 elements) [E0308]

    static NUMBERS2: [i32] = [1, 2, 3, 4, 5];
                             ^~~~~~~~~~~~~~~

The only way I found to deal with this problem is to specify the length in the type:

    static NUMBERS: [i32; 5] = [1, 2, 3, 4, 5];

Is there a better way? It should be possible to create an array without manually counting its elements.

How to specify const array in global scope in Rust?

Given by a colleague as a puzzle, I cannot figure out how this C program actually compiles and runs. What is this `&gt;&gt;&gt;=` operator and the strange `1P1` literal? I have tested in Clang and GCC. There are no warnings and the output is &quot;???&quot;

    #include &lt;stdio.h&gt;

    int main()
    {
        int a[2]={ 10, 1 };
	
        while( a[ 0xFULL?&#39;\0&#39;:-1:&gt;&gt;&gt;=a&lt;:!!0X.1P1 ] )
            printf(&quot;?&quot;);
	
	    return 0;
    }

What is the &gt;&gt;&gt;= operator in C?

I have read [this](https://stackoverflow.com/questions/6895522/is-0-a-decimal-literal-or-an-octal-literal). It&#39;s octal in C++ and decimal in Java. But no description about C?

Is it going to make any difference if 0 is octal or decimal? This is the question asked by my interviewer. I said no and I explained that it is always 0 regardless whether it is octal or decimal.

Then he asked why is it considered as octal in C++ and decimal in Java. I said it&#39;s the standard. Please let me know what is it in C? Will it make any difference? Why are they different in different standards?


Is 0 an octal or a decimal in C?

The [documentation](http://www.asp.net/web-api/overview/creating-web-apis/creating-api-help-pages) for enabling XmlDoc integration into your Web Api projects appears to only handle situations where all of your API types are part of your WebApi project.  In particular, it discusses how to reroute the XML documentation to `App_Data/XmlDocument.xml` and uncommenting a line in your config that will consume that file.  This implicitly only allows for one project&#39;s documentation file.  

However, in my setup I have my request and response types defined in a common &quot;Models&quot; project.  This means that if I have an endpoint defined such as:

    [Route(&quot;auth/openid/login&quot;)]
    public async Task&lt;AuthenticationResponse&gt; Login(OpenIdLoginRequest request) { ... }

Where `OpenIdLoginRequest` is defined in a separate C# project like so:

    public class OpenIdLoginRequest
    {
        /// &lt;summary&gt;
        /// Represents the OpenId provider that authenticated the user. (i.e. Facebook, Google, etc.)
        /// &lt;/summary&gt;
        [Required]
        public string Provider { get; set; }

        ...
    }


Despite the XML doccomments, the properties of the `request` parameter contain no documentation when you view the endpoint-specific help page (i.e. `http://localhost/Help/Api/POST-auth-openid-login`).  

How can I make it so that types in subprojects with XML documentation are surfaced in the Web API XML documentation?


Content Type	Original Author	Original Content on Stackoverflow
Question	DavidRR	View Question on Stackoverflow
Solution 1 - C#	Gargoyle	View Answer on Stackoverflow
Solution 2 - C#	Jack Pines	View Answer on Stackoverflow

Which C# XML documentation comment tag is used for 'true', 'false' and 'null'?

C# Problem Overview

C# Solutions

Solution 1 - C#

Solution 2 - C#

How to pass ArrayList<CustomeObject> from one activity to another?

Use curl to download a Dropbox folder via shared link (not public link)

Attributions