It&#39;s the **remainder operator** and is used to get the remainder after integer division. Lots of languages have it. For example:

    10 % 3 // = 1 ; because 3 * 3 gets you 9, and 10 - 9 is 1.

Apparently it is not the same as the [modulo operator](http://wiki.ecmascript.org/doku.php?id=strawman:modulo_operator) entirely.

That would be the [modulo operator][1], which produces the remainder of the division of two numbers.


  [1]: https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/Arithmetic_Operators#.25_.28Modulus.29

I am trying my hands on developing a simple android application in which I am trying to use [sqlcipher][1], which uses .so libraries internally. I have read the documentation on [how to use sqlcipher with android app][4]. I have followed the steps and it compiles without any error. But, at runtime it throws `UnsatisfiedLinkError`.

Googling around for it, I found that, [gradle doesn&#39;t support .so libraries yet][3], but I found a hack [here][2] which I am trying to use. But it throws compile time error at line #40 on the gist which is,

    tasks.withType(com.android.build.gradle.PackageApplicationTask) { pkgTask -&gt;
	    pkgTask.jniDir new File(buildDir, &#39;native-libs&#39;)
    }

 saying 

&gt; Could not find property &#39;com&#39; on Project &#39;MyProject&#39;

Here I am posting code from my build.gradle file.

    buildscript {
        repositories {
            maven { url &#39;http://repo1.maven.org/maven2&#39; }
        }
        dependencies {
            classpath &#39;com.android.tools.build:gradle:0.4&#39;
        }
    }
    apply plugin: &#39;android&#39;
    
    dependencies {
        compile files(&#39;libs/android-support-v4.jar&#39;)
        compile files(&#39;libs/commons-codec.jar&#39;)
        compile files(&#39;libs/guava-r09.jar&#39;)
        compile files(&#39;libs/sqlcipher.jar&#39;)
    }
    
    targetCompatibility = 1.6
    sourceCompatibility = 1.6
    
    android {
        target = &#39;android-14&#39;
    
        compileSdkVersion 17
        buildToolsVersion &quot;17.0.0&quot;
    
        defaultConfig {
            minSdkVersion 9
            targetSdkVersion 16
        }    
    
    }
    
    task copyNativeLibs(type: Copy) {
        from(new File(project(&#39;:MyProject&#39;).buildDir, &#39;native-libs&#39;)) { include &#39;**/*.so&#39; }
        into new File(buildDir, &#39;native-libs&#39;)
    }
    
    tasks.withType(Compile) { compileTask -&gt; compileTask.dependsOn copyNativeLibs }
    
    clean.dependsOn &#39;cleanCopyNativeLibs&#39;
    
    tasks.withType(com.android.build.gradle.PackageApplicationTask) { pkgTask -&gt;
        pkgTask.jniDir new File(buildDir, &#39;native-libs&#39;)
    }

Can, anybody please help me on what I have done wrong or what should I do to include those .so libraries in my apk?

As I am new to android development and gradle, please apologize me if I have misunderstood something.

  [1]: http://sqlcipher.net/
  [2]: https://gist.github.com/khernyo/4226923
  [3]: https://groups.google.com/forum/#!topic/adt-dev/SOs6mxZGjMM
  [4]: http://sqlcipher.net/sqlcipher-for-android/

Include .so library in apk in android studio

What I ultimately want to do is record from the user&#39;s microphone, and upload the file to the server when they&#39;re done. So far, I&#39;ve managed to make a stream to an &lt;audio&gt; element with the following code:

    var audio = document.getElementById(&quot;audio_preview&quot;);
    
    navigator.getUserMedia  = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;
    navigator.getUserMedia({video: false, audio: true}, function(stream) {
       audio.src = window.URL.createObjectURL(stream);
    }, onRecordFail);
    
    var onRecordFail = function (e) {
       console.log(e);
    }

How do I go from that, to recording to a file?

HTML5 record audio to file

How can I use modulo operator (%) in calculation of numbers for JavaScript projects?

How can I use modulo operator (%) in JavaScript?

<p>How can I use modulo operator (%) in calculation of numbers for JavaScript projects?</p>


   I have this JSON data:

    {
        &quot;employees&quot;: [
            {
                &quot;firstName&quot;: &quot;John&quot;,
                &quot;lastName&quot;: &quot;Doe&quot;
            },
            {
                &quot;firstName&quot;: &quot;Anna&quot;,
                &quot;lastName&quot;: &quot;Smith&quot;
            },
            {
                &quot;firstName&quot;: &quot;Peter&quot;,
                &quot;lastName&quot;: &quot;Jones&quot;
            }
        ]
    }


   Suppose I don&#39;t know how many columns and rows of employees I have, how do I create this object in JavaScript (Without concate strings)? Assume that I get each row in &quot;onGeneratedRow&quot; method, and I need to push each column (firstName, lastName) to the &#39;{}&#39; brackets.

    var viewData = { 
    	employees : [] 
    };
    
    var rowNum = -1; 
    
    function onGeneratedRow(columnsResult)
    {
    	rowNum = rowNum + 1;
    	viewData.employees.push({});	
    	columnsResult.forEach(function(column) {		  		  
    	var columnName = column.metadata.colName;
    	viewData.employees[rowNum][columnName] = column.value;	});
    }

Create JSON object dynamically via JavaScript (Without concate strings)

I have a structure like this:

    var myMap = {
        partnr1: [&#39;modelA&#39;, &#39;modelB&#39;, &#39;modelC&#39;],
        partnr2: [&#39;modelA&#39;, &#39;modelB&#39;, &#39;modelC&#39;]
    };

	

I am going to iterate through each of the elements (partnr) with their associatives (models).

I am trying a double $each iteration in order to achieve this, but nothing happens:

    $.each(myMap, function (i, val) {
        $.each(i, function (innerKey, innerValue) {
    
            setTimeout(function () {
                $(&#39;#variant&#39;).fadeOut(&quot;slow&quot;, function () {
                    $(this).text(innerKey + &quot;-&quot; + innerValue).fadeIn(&quot;slow&quot;);
    
                });
    
            }, i * 6000);
    
        });
    });

The effect with fading in and out that I am trying to achieve is working fine when using a single value array (Object), but not when I need to have more than one value for each key like here.

Any ideas of how to accomplish this iteration succesfully and are there other ways than using a map that would be better in this case ?

Any suggestions would be of interest.

iterate through a map in javascript

I have some text in a hidden textarea. When a button is clicked I would like to have the text offered for download as a `.txt` file. Is this possible using AngularJS or Javascript?

How do you serve a file for download with AngularJS or Javascript?

I&#39;m still very confused about **CommonJS, AMD** and **RequireJS**, even after reading a lot.

I know that **CommonJS** (formerly **ServerJS**) is a group for defining some **JavaScript** specifications (i.e. modules) when the language is used outside the browser. **CommonJS** modules specification has some implementation like **Node.js** or **RingoJS**, right?

&gt; What&#39;s the relation between **CommonJS**, **Asynchronous Module Definition** (AMD) and **RequireJS**? 
&gt;
&gt; Is **RequireJS** an implementation of the **CommonJS** module definition? If yes, what&#39;s **AMD** then?

Relation between CommonJS, AMD and RequireJS?

I have a template binding that displays a model attribute called &#39;date&#39; which is a date, using Angular&#39;s date filter.

    &lt;span class=&quot;gallery-date&quot;&gt;{{gallery.date | date:&#39;mediumDate&#39;}}&lt;/span&gt;

So far so good. However at the moment, if there is no value in the date field, the binding displays nothing. However, I would like it to display the string &#39;Various&#39; if there is no date.

I can get the basic logic using a binary operator:

    &lt;span class=&quot;gallery-date&quot;&gt;{{gallery.date || &#39;Various&#39;}}&lt;/span&gt;

However I can&#39;t get it to work with the date filter:

    &lt;span class=&quot;gallery-date&quot;&gt;{{gallery.date | date:&#39;mediumDate&#39; || &quot;Various&quot;}}&lt;/span&gt;

**How can I use the binary operator alongside the date filter?**


Angularjs Template Default Value if Binding Null / Undefined (With Filter)

In C, I have two char arrays:


    char array1[18] = &quot;abcdefg&quot;;
    char array2[18];

How to copy the value of `array1` to `array2` ? Can I just do this: `array2 = array1`?


How to copy a char array in C?

Below is a code snippet,

    int a = 1;
    char b = (char) a;
    System.out.println(b);

But what I get is empty output.

    int a = &#39;1&#39;;
    char b = (char) a;
    System.out.println(b);

I will get 1 as my output. 

Can somebody explain this? And if I want to convert an int to a char as in the first snippet, what should I do?

Convert int to char in java

I&#39;m not sure what will be in the char array after initialization in the following ways.    

1.`char buf[10] = &quot;&quot;;`  
2. `char buf[10] = &quot; &quot;;`  
3. `char buf[10] = &quot;a&quot;;`  

For case 2, I think `buf[0]` should be `&#39; &#39;`, `buf[1]` should be `&#39;\0&#39;`, and from `buf[2]` to `buf[9]` will be random content. For case 3, I think `buf[0]` should be `&#39;a&#39;`, `buf[1]` should be &#39;\0&#39;, and from `buf[2]` to `buf[9]` will be random content.

Is that correct?

And for the case 1, what will be in the `buf`? `buf[0] == &#39;\0&#39;` and from `buf[1]` to `buf[9]` will be random content?

C char array initialization

I have got characters like that in my notepad++

[![npp screenshot of NULs][1]][1]

When i am trying to copy whole line, i am actually copying everything until &quot;NUL&quot;:

    File:1

What i want to do, is replace those null, to be nothing, so i can copy my whole line.
Maybe there is any keyword that will tell notepad++(or any other program that might help) to replace those characters?
When i am selecting it, use Right Click and then &quot;clear&quot;, its gone - but i dont want to do it one by one.

I don&#39;t care about removing the cause of this problem, just the effect(NULs)


  [1]: http://i.stack.imgur.com/n9gfa.png

Removing &quot;NUL&quot; characters

Consider this code:

    var x = &quot;tesx&quot;.Remove(&#39;x&#39;);

If I run this code, I get this exception:

&gt; startIndex must be less than length of string.

Why can I pass a char instead of an int to this method?
Why don&#39;t I get a compilation error?

![enter image description here][1]

Why does the compiler have this behavior?


  [1]: http://i.stack.imgur.com/wC8kP.png

Why does the string Remove() method allow a char as a parameter?

Are there any **invisible** characters? I have checked Google for invisible characters and ended up with many answers but I&#39;m not sure about those. Can someone on Stack Overflow tell me more about this?

Also I have checked a profile on Facebook and found that the user didn&#39;t have any name to his profile? How can this be possible? Is it some database issue? Hacking or something?

When I searched over Internet, I found that `200D` is an ASCII value with an **invisible** character. Is it true? 


Invisible characters - ASCII

I&#39;m writing a script in Unix where I have to check whether the first character in a string is &quot;/&quot; and if it is, branch.

For example, I have a string:

    /some/directory/file

I want this to return 1, and:

    server@10.200.200.20:/some/directory/file

to return 0.






How can I check the first character in a string in Bash or Unix shell?

Please explain what, exactly, happens when the following sections of code are executed:

    int a=&#39;\15&#39;;
    System.out.println(a);

this prints out 13;

    int a=&#39;\25&#39;;
    System.out.println(a);

this prints out 21;

    int a=&#39;\100&#39;;
    System.out.println(a);

this prints out 64.

What are the Java semantics of an escaped number in a character literal, e.g. &#39;\15&#39; ?

Can someone please explain to me what is going on here:

    char c = &#39;+&#39;;
    int i = (int)c;
    System.out.println(&quot;i: &quot; + i + &quot; ch: &quot; + Character.getNumericValue(c));

This prints `i: 43 ch:-1 `. Does that mean I have to rely on primitive conversions to convert `char` to `int`? So how can I convert a `Character` to `Integer`?

**Edit:** Yes I know `Character.getNumericValue` returns `-1` if it is not a numeric value and that makes sense to me. The question is: why does doing primitive conversions return `43`?

**Edit2:** `43` is the ASCII for `+`, but I would expect the cast to not succeed just like `getNumericValue` did not succeed. Otherwise that means there are two semantic equivalent ways to perform the same operation but with different results?

Converting characters to integers in Java

Is it safe to use an `@` symbol as part of a user? For example, a possible URL would be `http://example.com/@dave`.

The idea is that, nowadays, users are commonly called &quot;@user&quot;, so why not make the user page &quot;@username&quot;?

Content Type	Original Author	Original Content on Stackoverflow
Question	Ziyaddin Sadigov	View Question on Stackoverflow
Solution 1 - Javascript	MarioDS	View Answer on Stackoverflow
Solution 2 - Javascript	Joseph	View Answer on Stackoverflow

How can I use modulo operator (%) in JavaScript?

Javascript Problem Overview

Javascript Solutions

Solution 1 - Javascript

Solution 2 - Javascript

HTML5 record audio to file

Include .so library in apk in android studio

Attributions