`apply` calls a function with a set of arguments. It&#39;s not part of jQuery, it&#39;s part of core Javascript. However, there is mention of it in the jQuery docs:

http://docs.jquery.com/Types#Context.2C_Call_and_Apply

Syntax:

    somefunction.apply(thisObj, [argsArray])

The above calls the function `somefunction`, setting `this` to `thisObj` within the function&#39;s scope, and passing in the arguments from `argsArray` as the arguments to the function.

Essentially, apply will call a function with the context being set to the object you apply the function to. This means that within the function, referencing `this` will refer to that object.

I&#39;m building an app where I have a table for events and a table for venues. I want to be able to grant other applications access to this data. I have a few questions related to best practices for this kind of problem.

1. **How should I structure the database classes?**
I currently have classes for EventsDbAdapter and VenuesDbAdapter, which provide the logic for querying each table, while having a separate DbManager (extends SQLiteOpenHelper) for managing database versions, creating/upgrading databases, giving access to database (getWriteable/ReadeableDatabase). Is this the recommended solution, or would I be better off either consolidating everything to one class (ie. the DbManager) or separation everything and letting each Adapter extends SQLiteOpenHelper?

2. **How should I design content providers for multiple tables?**
Extending the previous question, should I use one Content Provider for the whole app, or should I create separate providers for Events and Venues?

Most examples I find only deal with single table apps, so I would appreciate any pointers here.

Best practices for exposing multiple tables using content providers in Android

I&#39;m running `Apache/2.2.11 (Win32) PHP/5.3.0` and I did the following in my .htaccess file:

    SetEnv FOO bar

If I print out the `$_ENV` variable in a PHP file, I get an empty array. Why doesn&#39;t my environment variable appear there? Why is it empty in the first place?

I did find my variable though, but it appears in the `$_SERVER` variable. And for some reason it appears twice, sort of. Why is this?

    [REDIRECT_FOO] =&gt; bar
    [FOO] =&gt; bar

It appears I can get it using `getenv(&#39;FOO&#39;)`, so maybe I should just use that instead. But I am still a bit curious to what causes this. Is this a Windows issue? Or what is going on?

Why is my $_ENV empty?

I see that in different plugins and codes, but I don&#39;t understand what does that function... In the jQuery api isn&#39;t referenced!

What&#39;s the .apply jQuery function?

<p>I see that in different plugins and codes, but I don't understand what does that function... In the jQuery api isn't referenced!</p>


I have an input box and I want it to be disabled and at the same time hide it to avoid problems when porting my form.

So far I have the following code to hide my input:

    $(&quot;.shownextrow&quot;).click(function() { 
        $(this).closest(&quot;tr&quot;).next().show().find(&#39;.longboxsmall&#39;).hide();
    });


This is the input that gets hidden as a result:
   
    &lt;input class=&quot;longboxsmall&quot; type=&quot;text&quot; /&gt;


How can I also add the disabled attribute to the input?



Add disabled attribute to input element using Javascript

I want to replace the contents within a html element so I&#39;m using the following function for that:

    function ReplaceContentInContainer(id,content) {
       var container = document.getElementById(id);
       container.innerHTML = content;
    }
    
    ReplaceContentInContainer(&#39;box&#39;,&#39;This is the replacement text&#39;);
    
    &lt;div id=&#39;box&#39;&gt;&lt;/div&gt;

The above works great but the problem is I have more than one html element on a page that I want to replace the contents of. So I can&#39;t use ids but classes instead. I have been told that javascript does not support any type of inbuilt get element by class function. So how can the above code be revised to make it work with classes instead of ids? 

P.S. I don&#39;t want to use jQuery for this.


How to Get Element By Class in JavaScript?

Currently I have an input box which will detect the URL and parse the data.

So right now, I am using:

    var urlR = /^(?:([A-Za-z]+):)?(\/{0,3})([0-9.\-A-Za-z]+)
               (?::(\d+))?(?:\/([^?#]*))?(?:\?([^#]*))?(?:#(.*))?$/;
    var url= content.match(urlR);

The problem is, when I enter a URL like `www.google.com`, its not working. when I entered `http://www.google.com`, it is working.

I am not very fluent in regular expressions. Can anyone help me?

What is a good regular expression to match a URL?

Can we call the function written in one JS file in another JS file? Can anyone help me how to call the function from another JS file? 

Can we call the function written in one JavaScript in another JS file?

How to get tag in html page, if I know what text tag contains.
E.g.:

    &lt;a ...&gt;SearchingText&lt;/a&gt;


How to get element by innerText

I&#39;m using CKEditor. I am saving the form values with ajax using page methods.

But the content of CKEditor value cannot be saving into the table.

I dont postback the page.

What can I do for that?


How can I get the content of CKEditor using JQuery?

I need to be able to add 1, 2 , 5 or 10 days to today&#39;s date using jQuery.


How to add number of days to today&#39;s date?

I&#39;m trying to get some json data from a &quot;remote&quot; website.
I run my web service on the 99000 port then, I launch my website on the 99001 port (http://localhost:99001/index.html).

I get the following message:

        XMLHttpRequest cannot load http://localhost:99000/Services.svc/ReturnPersons. Origin http://localhost:99001 is not allowed by Access-Control-Allow-Origin.
    
   

 Even If I launch my web page as an HTML file, I get this:
    
        XMLHttpRequest cannot load http://localhost:99000/Services.svc/ReturnPersons.Origin null is not allowed by Access-Control-Allow-Origin.

The web service returns data. I try to catch the data items like this:

    var url = &quot;http://localhost:99000/Services.svc/ReturnPersons&quot;;
    $.getJSON(url, function (data) {
    success: readData(data)
    });
    function readData(data) {
        alert(data[0].FirstName);
    }

And I&#39;m trying to get this structure:

    [{&quot;FirstName&quot;:&quot;Foo&quot;,&quot;LastName&quot;:&quot;Bar&quot;},{&quot;Hello&quot;:&quot;Foo&quot;,&quot;LastName&quot;:&quot;World&quot;}]

Do you know why I&#39;m getting this error?

XMLHttpRequest cannot load an URL with jQuery

I have a problem with the jQuery-UI datepicker, I have searched and searched but I didn&#39;t find the answer. I have the following code:

    &lt;script type=&quot;text/javascript&quot;&gt;
    $(function() {		         
        $(&quot;#birthdate&quot; ).datepicker({
			changeMonth: true,
			changeYear: true,
            yearRange: &#39;1920:2010&#39;,
            dateFormat : &#39;dd-mm-yy&#39;,
            defaultDate: &#39;01-01-1985&#39;
        });
    });
    &lt;/script&gt;

I want that when the user click in the `#birthdate` input that the current date selected to be `01-01-1985`, now it&#39;s setting the current date.  

jQuery-UI datepicker default date

I started to notice my WD drive getting full and ran a size:gigantic file search on it.  It has turned up several files here:

`F:\SCOTT-SHARED-DESKTOP\My Documents\JPA_SPRING_STRUTS\.metadata\.plugins\org.maven.ide.eclipse\nexus\d9d714e11cb097b3ffcec91cccc65d3e_58.cfs`

that exceed 189,992 KB (189 MB)!

Anyone know about these rascals?

What are the gigantic *.CFS files all about in Eclipse workspace plugin folder?

I poked around StackOverflow and Google, but couldn&#39;t find anyone who has put together a comparison of authentication gems or plugins for Rails (I&#39;m looking for something for Rails 3). What authentication solutions are available for Rails 3, which are most popular, and what are the differences between them?

Rails 3 authentication solutions

I think I  have a bug in one plugin. I would like to load only this plugin, without having to delete all the other bundles in my pathogen&#39;s bundle folder, to debug.

Is it possible?

Temporarily disable some plugins using pathogen in vim.

I&#39;m creating a web site that I think must have a client side database.  The other option would be to stick *everything* on the server at the expense of increased complexity and decreased scalability.  What options do I have?  Must I build a plugin?  Must I wait until everybody&#39;s HTML5 compliant?
___
*Update* There&#39;s been a lot of comments about why I would actually need this.  Here are my thoughts.  Tell me if I&#39;m being silly:
 
- The clients will have a large and complex state that will require something like a database to provide the data interaction that I need.  Therefore (I think) cookies are out of the picture.  
- This data is transient, so the client won&#39;t care if it gets erased as soon as they close a session.  However they will need to keep the data if they go to a different web page and then come back.  Therefore (I think) somehow storing the data in some sort of a javascript SQL implementation will not work.
- I can certainly do everything that I want to do on the server, and servers *can* scale to manage the load (Facebook).  *But* (I think) I&#39;d rather build a plugin than pay for the infrastructure to support this load.  This is for a bare bones startup.  (The richer the startup is, the barer my bones will be.)


I need a client side browser database. What are my options

I&#39;m trying to insert this code:

     &lt;script type=&quot;text/javascript&quot;&gt;
        some Javascript codes comes here
    &lt;/script&gt;

to WordPress&#39; `&lt;head&gt;&lt;/head&gt;` section in front end and in admin panel

E.g., Joomla! 1.6 has an API that allows this:

            $doc =&amp; JFactory::getDocument();
            $doc-&gt;addCustomTag($headTag);

I need to add different things for different pages.  For example:

**Page 1**
I need to add 

    &lt;link rel=&quot;alternate&quot; type=&quot;application/rss+xml&quot; title=&quot;feed title&quot; href=&quot;feed url&quot; /&gt;

For a few pages

**Page 2**
I need to add 

    &lt;script type=\&quot;text/javascript\&quot; src=\&quot;&quot; . LIVE_SITE .
     &quot;/wp-content/plugins/jobs/lknlibrary/js/ajax.js\&quot;&gt;&lt;/script&gt;
        &lt;script type=\&quot;text/javascript\&quot;&gt;
        
        var ajax = new sack();
        var currentClientID=false;
        function getClientData()
        {
            var clientId = document.getElementById(&#39;db_country_id&#39;).value.replace(/[^0-9]/g,&#39;&#39;);
            ajax.requestFile = &#39;&quot; .BASE_PATH . &quot;/wp-content/plugins/jobs/com_jobs_admin/tasks/get_location_data.php?task=get_location_data&amp;name=db_parent_id&amp;getClientId=&#39;+clientId;	// Specifying which file to get
            ajax.onCompletion = showClientData;	// Specify function that will be executed after file has been found
            ajax.runAJAX();        // Execute AJAX function
    	}
    	
    	function showClientData()
    	{
            clearJS = ajax.response;
            var strTagStrippedText = clearJS.replace(/(&lt;\s*\/?\s*)div(\s*([^&gt;]*)?\s*&gt;)/gi ,&#39;&#39;);
            document.getElementById(&#39;locationsDiv&#39;).innerHTML=strTagStrippedText ;
    	}
    	
    	function initFormEvents()
    	{
            if (document.getElementById(&#39;db_country_id&#39;)){
                document.getElementById(&#39;db_country_id&#39;).onchange = getClientData;
                document.getElementById(&#39;db_country_id&#39;).focus();
            }
    	}
    	
    	window.onload = initFormEvents;
	&lt;/script&gt;

for a few pages

**Page 3**
I need to add 

     &lt;link rel=&quot;stylesheet&quot; type=&quot;text/css&quot; href=&quot;/wordpress/wp-content/plugins/jobs/lknlibrary/js/tabs/tab.webfx.css&quot; /&gt;
&lt;script type=&quot;text/javascript&quot; src=&quot;/wordpress/wp-content/plugins/jobs/lknlibrary/js/tabs/tabpane.js&quot;&gt;&lt;/script&gt;

for a few pages

I have 70+ pages in admin panel like those above.

Trying to manage the header of the WordPress with the example is a bit difficult.


Adding &lt;script&gt; to WordPress in &lt;head&gt; element

Suppose I have a n by 2 matrix and a function that takes a 2-vector as one of its arguments. I would like to apply the function to each row of the matrix and get a n-vector. How to do this in R?

For example, I would like to compute the density of a 2D standard Normal distribution on three points:

    bivariate.density(x = c(0, 0), mu = c(0, 0), sigma = c(1, 1), rho = 0){
    	exp(-1/(2*(1-rho^2))*(x[1]^2/sigma[1]^2+x[2]^2/sigma[2]^2-2*rho*x[1]*x[2]/(sigma[1]*sigma[2]))) * 1/(2*pi*sigma[1]*sigma[2]*sqrt(1-rho^2))
    }
    
    out &lt;- rbind(c(1, 2), c(3, 4), c(5, 6))

How to apply the function to each row of `out`?

How to pass values for the other arguments besides the points to the function in the way you specify? 



Apply a function to every row of a matrix or a data frame

I have a vector of strings.

    d &lt;- c(&quot;Mon&quot;,&quot;Tues&quot;,&quot;Wednes&quot;,&quot;Thurs&quot;,&quot;Fri&quot;,&quot;Satur&quot;,&quot;Sun&quot;)

for which I want to paste the string &quot;day&quot; on each element of the vector in a way similar to this.

    week &lt;- apply(d, &quot;day&quot;, paste, sep=&#39;&#39;)

How to paste a string on each element of a vector of strings using apply in R?

I know that loops are slow in `R` and that I should try to do things in a vectorised manner instead.

But, why? Why are loops slow and `apply` is fast? `apply` calls several sub-functions -- that doesn&#39;t seem fast.

**Update:** I&#39;m sorry, the question was ill-posed. I was confusing vectorisation with `apply`. My question should have been, 

**&quot;Why is vectorisation faster?&quot;**

Why are loops slow in R?

I&#39;m trying to get the min/max for each column in a large data frame, as part of *getting to know my data*. My first try was:

    apply(t,2,max,na.rm=1)

It treats everything as a character vector, because the first few columns are character types. So max of some of the numeric columns is coming out as `&quot;   -99.5&quot;`.

I then tried this:

    sapply(t,max,na.rm=1)

but it complains about *max not meaningful for factors*. (`lapply` is the same.) What is confusing me is that `apply` thought `max` was perfectly meaningful for factors, e.g. it returned &quot;ZEBRA&quot; for column 1.

BTW, I took a look at https://stackoverflow.com/questions/2482125/r-using-sapply-on-vector-of-posixct and one of the answers says &quot;*When you use sapply, your objects are coerced to numeric,...*&quot;. Is this what is happening to me? If so, is there an alternative apply function that does not coerce? Surely it is a common need, as one of the key features of the data frame type is that each column can be a different type.

Apply function to each column in a data frame observing each columns existing data type

I tried this:

    // mod.js
    var a = 1;
    this.b = 2;
    exports.c = 3;

    // test.js
    var mod = require(&#39;./mod.js&#39;);
    console.log(mod.a);    // undefined
    console.log(mod.b);    // 2
    console.log(mod.c);    // 3, so this === exports?

So I image that require() may be implement like this:

    var require = function (file) {
        var exports = {};
        var run = function (file) {
            // include &quot;file&quot; here and run
        };
        run.apply(exports, [file]);
        return exports;
    }

Is that right? Please help me to understand require(), or where can I find the source code. Thanks!

Content Type	Original Author	Original Content on Stackoverflow
Question	CRISHK Corporation	View Question on Stackoverflow
Solution 1 - Javascript	Amber	View Answer on Stackoverflow
Solution 2 - Javascript	issa marie tseng	View Answer on Stackoverflow

What's the .apply jQuery function?

Javascript Problem Overview

Javascript Solutions

Solution 1 - Javascript

Solution 2 - Javascript

Why is my $_ENV empty?

Best practices for exposing multiple tables using content providers in Android

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