You can use:

    var tomorrow = new Date();
    tomorrow.setDate(tomorrow.getDate()+1);

For example, since there are 30 days in April, the following code will output May 1:

    var day = new Date(&#39;Apr 30, 2000&#39;);
    console.log(day); // Apr 30 2000
    
    var nextDay = new Date(day);
    nextDay.setDate(day.getDate() + 1);
    console.log(nextDay); // May 01 2000    

See [fiddle][1].


  [1]: http://jsfiddle.net/sAvkA/688/

Copy-pasted from here:
https://stackoverflow.com/questions/3674539/javascript-date-increment-question

&gt; Three options for you:
&gt; 
&gt; Using just JavaScript&#39;s Date object (no libraries):
&gt; 
&gt;     var today = new Date();
&gt;     var tomorrow = new Date(today.getTime() + (24 * 60 * 60 * 1000));
&gt; 

One-liner

&gt; `const tomorrow = new Date(new Date().getTime() + (24 * 60 * 60 * 1000));`

Or if you don&#39;t mind changing the date in place (rather than creating
&gt; a new date):
&gt; 
&gt;     var dt = new Date();
&gt;     dt.setTime(dt.getTime() + (24 * 60 * 60 * 1000));
&gt; 
&gt; Edit: See also Jigar&#39;s answer and David&#39;s comment below: var tomorrow
&gt; = new Date(); tomorrow.setDate(tomorrow.getDate() + 1);
&gt; 
&gt;  Using MomentJS:
&gt; 
&gt;     var today = moment();
&gt;     var tomorrow = moment(today).add(1, &#39;days&#39;);
&gt; 
&gt; (Beware that add modifies the instance you call it on, rather than
&gt; returning a new instance, so today.add(1, &#39;days&#39;) would modify today.
&gt; That&#39;s why we start with a cloning op on var tomorrow = ....)
&gt; 
&gt;  Using DateJS, but it hasn&#39;t been updated in a long time:
&gt; 
&gt;     var today = new Date(); // Or Date.today()
&gt;     var tomorrow = today.add(1).day();



Using Date object guarantees that. For eg if you try to create `April 31st` :

    new Date(2014,3,31)        // Thu May 01 2014 00:00:00

&gt; Please note that it&#39;s zero indexed, so Jan. is `0`, Feb. is `1` etc.

I&#39;m looking for a fuzzy search JavaScript library to filter an array. I&#39;ve tried using [fuzzyset.js](http://glench.github.io/fuzzyset.js/) and [fuse.js](https://fusejs.io/), but the results are terrible (there are demos you can try on the linked pages).

After doing some reading on Levenshtein distance, it strikes me as a poor approximation of what users are looking for when they type. For those who don&#39;t know, the system calculates how many **insertions**, **deletions**, and **substitutions** are needed to make two strings match.

One obvious flaw, which is fixed in the Levenshtein-Demerau model, is that both *blub* and *boob* are considered equally similar to *bulb* (each requiring two substitutions). It is clear, however, that *bulb* is more similar to *blub* than *boob* is, and the model I just mentioned recognizes that by allowing for **transpositions**.

I want to use this in the context of text completion, so if I have an array `[&#39;international&#39;, &#39;splint&#39;, &#39;tinder&#39;]`, and my query is *int*, I think *international* ought to rank more highly than *splint*, even though the former has a score (higher=worse) of 10 versus the latter&#39;s 3.

So what I&#39;m looking for (and will create if it doesn&#39;t exist), is a library that does the following:

- Weights the different text manipulations
- Weights each manipulation differently depending on where they appear in a word (early manipulations being more costly than late manipulations)
- Returns a list of results sorted by relevance

Has anyone come across anything like this? I realize that StackOverflow isn&#39;t the place to be asking for software recommendations, but implicit (not anymore!) in the above is: am I thinking about this the right way?

-------------
Edit
----
I found a [good paper (pdf)](https://web.archive.org/web/20160804043501/https://www.cs.cmu.edu/~pradeepr/papers/ijcai03.pdf) on the subject. Some notes and excerpts: 

&gt;Affine edit-distance functions assign a relatively lower cost to a sequence of insertions or deletions

&gt;the Monger-Elkan distance function (Monge &amp; Elkan 1996), which is an affine variant of the Smith-Waterman distance function (Durban et al. 1998) with particular cost parameters

For the [Smith-Waterman distance (wikipedia)](http://en.wikipedia.org/wiki/Smith%E2%80%93Waterman_algorithm), &quot;Instead of looking at the total sequence, the Smith–Waterman algorithm compares segments of all possible lengths and optimizes the similarity measure.&quot; It&#39;s the n-gram approach.

&gt; A broadly similar metric, which is not based on an edit-distance model, is the
Jaro metric (Jaro 1995; 1989; Winkler
1999). In the record-linkage literature, good results have been obtained using variants of this method, which is based on the number and order of the common characters between two strings.

&gt;A variant of this due to Winkler (1999) also uses the length P of the longest common prefix

&gt;(seem to be intended primarily for short strings)

For text completion purposes, the Monger-Elkan and Jaro-Winkler approaches seem to make the most sense. Winkler&#39;s addition to the Jaro metric effectively weights the beginnings of words more heavily. And the affine aspect of Monger-Elkan means that the necessity to complete a word (which is simply a sequence of additions) won&#39;t disfavor it too heavily. 

Conclusion:
&gt;the TFIDF
ranking performed best among several token-based distance
metrics, and a tuned affine-gap edit-distance metric proposed by Monge and Elkan performed best among several
string edit-distance metrics. A surprisingly good distance
metric is a fast heuristic scheme, proposed by Jaro and later extended by Winkler.
This works almost as well as the Monge-Elkan scheme, but
is an order of magnitude faster.
One simple way of combining the TFIDF method and the
Jaro-Winkler is to replace the exact token matches used in
TFIDF with approximate token matches based on the Jaro-
Winkler scheme. This combination performs slightly better than either Jaro-Winkler or TFIDF on average, and occasionally performs much better. It is also close in performance to a learned combination of several of the best metrics
considered in this paper.

Javascript fuzzy search that makes sense

I am using [Mocha][1] in order to unit test an application written for Node.js.

I wonder if it&#39;s possible to unit test functions that have not been exported in a module.

**Example:**

I have a lot of functions defined like this in `foobar.js`:

    function private_foobar1(){
        ...
    }

    function private_foobar2(){
        ...
    }
&lt;/code&gt;

And a few functions exported as public:

    exports.public_foobar3 = function(){
        ...
    }

The test case is structured as follows:

    describe(&quot;private_foobar1&quot;, function() {
        it(&quot;should do stuff&quot;, function(done) {
            var stuff = foobar.private_foobar1(filter);
            should(stuff).be.ok;
            should(stuff).....

Obviously this does not work, since `private_foobar1` is not exported.

What is the correct way to unit-test private methods? Does Mocha have some built-in methods for doing that?

  [1]: https://en.wikipedia.org/wiki/Mocha_(JavaScript_framework)





Unit testing of private functions with Mocha and Node.js

I have the following script which returns the next day:


    function today(i)
		{
			var today = new Date();
			var dd = today.getDate()+1;
			var mm = today.getMonth()+1;
			var yyyy = today.getFullYear();
			
			today = dd+&#39;/&#39;+mm+&#39;/&#39;+yyyy;

			return today;	
		}

By using this:

    today.getDate()+1;

I am getting the next day of the month (for example today would get 16).

My problem is that this could be on the last day of the month, and therefore end up returning **32/4/2014**

Is there a way I can get the guaranteed correct date for the next day?

JavaScript, get date of the next day

I have the following script which returns the next day:
<pre><code class="hljs language-ini">function today(i)
	{
		var today = new Date();
		var dd = today.getDate()+1;
		var mm = today.getMonth()+1;
		var yyyy = today.getFullYear();
		
		today = dd+'/'+mm+'/'+yyyy;

		return today;	
	}
</code></pre>
By using this:
<pre><code class="hljs language-ini">today.getDate()+1;
</code></pre>
I am getting the next day of the month (for example today would get 16).
My problem is that this could be on the last day of the month, and therefore end up returning 32/4/2014
Is there a way I can get the guaranteed correct date for the next day?

I&#39;m using Socket.io v0.9.16 and
Chrome 34

I&#39;m trying to remove a specific listener, or unsubscribe from a specific subscription

Something like this:


    socket.on(&#39;testComplete&#39;,function(data){
	    console.log(&#39;test complete&#39;,data);
    }); 

    function emitTest(){
        console.log(&#39;emitting test&#39;);
        socket.emit(&#39;test&#39;,&#39;first emit&#39;);
    }
    
    function removeListener(){
        socket.removeListener(&#39;testComplete&#39;);
    }

  
If I call the `emitTest` function, and then the `removeListener` function, I still see the `&#39;test complete&#39;` message when I call `emitTest` again. The listener should have been removed, if the socket function even works.

I&#39;m looking for a way to remove a *specific* listener that actually works.

[This answer][1] says that removeListener doesn&#39;t work.

Is there any downside to just doing this:

    socket.removeListener=function(name){
    		if(socket.$events.hasOwnProperty(name)){
    			delete socket.$events[name];
    		}
    	};

I marked an answer as correct, but I&#39;m using the above in my code since it works better with my design.

  [1]: https://stackoverflow.com/questions/9418697/how-to-unsubscribe-from-a-socket-io-subscription

socket.io Removing specific listener

My need is to call alert when I click on Add to Wishlist button and should disappear the alert in 2 secs. This is how I tried, but the alert is disappearing instantly as soon as it is appearing. Not sure, where the bug is.. Can anyone help me out?

JS Script
```js
$(document).ready (function(){
   $(&quot;#success-alert&quot;).hide();
   $(&quot;#myWish&quot;).click(function showAlert() {
      $(&quot;#success-alert&quot;).alert();
      window.setTimeout(function () { 
         $(&quot;#success-alert&quot;).alert(&#39;close&#39;); 
      }, 2000);				
   });		
});
```

HTML Code:
```html
&lt;div class=&quot;product-options&quot;&gt;
   &lt;a id=&quot;myWish&quot; href=&quot;&quot; class=&quot;btn btn-mini&quot;&gt;Add to Wishlist &lt;/a&gt;
   &lt;a href=&quot;#&quot; class=&quot;btn btn-mini&quot;&gt; Purchase &lt;/a&gt;
&lt;/div&gt;
```
Alert Box:
```html
&lt;div class=&quot;alert alert-success&quot; id=&quot;success-alert&quot;&gt;
   &lt;button type=&quot;button&quot; class=&quot;close&quot; data-dismiss=&quot;alert&quot;&gt;x&lt;/button&gt;
   &lt;strong&gt;Success!&lt;/strong&gt;
   Product have added to your wishlist.
&lt;/div&gt;
```

Bootstrap Alert Auto Close

I need to **change default pdf page width and font size** in jspdf.debug.js. 

Where and how to change the default values in jspdf.debug.js?

Where to change default pdf page width and font size in jspdf.debug.js?

I have a form that allows a user to upload an image.

Once the image is loaded, we perform some scaling on it in order to reduce its filesize before we pass it back to the server.

To do this, we place it on the canvas and manipulate it there.

This code will render the scaled image on the canvas, with the canvas of size 320 x 240px:
   
    ctx.drawImage(img, 0, 0, canvas.width, canvas.height)

... where canvas.width and canvas.height is the image height and width x a scaling factor based on the size of the original image.

But when I go to use the code: 

    ctx.drawImage(img, 0, 0, canvas.width, canvas.height, 0, 0, canvas.width, canvas.height

... I only get part of the image on the canvas, in this case the top left corner. I need the whole image &#39;scaled&#39; to fit on the canvas, despite the actual image size being larger than the 320x240 canvas size.

So for the code above, the width and heights are 1142x856, as that is the final image size. I need to maintain that size to pass beck to the server when the form is submitted, but only want a smaller view of it to appear in the canvas for the user.

What am I missing here? Can anyone point me in the right direction please?

Many thanks in advance.

Scaling an image to fit on canvas

How do you perform debounce in React.js?

I want to debounce the handleOnChange.

I tried with `debounce(this.handleOnChange, 200)` but it doesn&#39;t work.
 
    function debounce(fn, delay) {
      var timer = null;
      return function() {
        var context = this,
          args = arguments;
        clearTimeout(timer);
        timer = setTimeout(function() {
          fn.apply(context, args);
        }, delay);
      };
    }

    var SearchBox = React.createClass({
      render: function() {
        return &lt;input type=&quot;search&quot; name=&quot;p&quot; onChange={this.handleOnChange} /&gt;;
      },

      handleOnChange: function(event) {
        // make ajax call
      }
    });


Perform debounce in React.js

I am using the following code to convert a server-side date-time to local time using moment.js.

     moment(moment(&#39;Wed, 23 Apr 2014 09:54:51 +0000&#39;).format(&#39;lll&#39;)).fromNow()

But I am getting: 

&gt; Deprecation warning: moment construction falls back to js Date. This is discouraged and will be removed in upcoming major release. Please refer to https://github.com/moment/moment/issues/1407 for more info.

It seems I cannot get rid of it! How can I fix it?

“Deprecation warning: moment construction falls back to js Date” when trying to convert RFC2822 date in moment.js

I have a datasets where all the dates have the following format:

    2012-10-09T19:00:55Z

I&#39;d like to be able to be able to use methods like `.weekday` on them. How do I convert them to the proper format in Python?


Parse rfc3339 date strings in Python?

I want to compare two dates for my Android application, but I got a really weird issue.

For example:

If I set the `back in the past` date to 127 days ago:

    this.dateEvent = System.currentTimeMillis() - (127 * 24 * 3600 * 1000)

And then compare it to the current date (Days between)

		Calendar sDate = getDatePart(new Date(this.dateEvent));
		Calendar eDate = getDatePart(new Date(System.currentTimeMillis()));
		
		int daysBetween = 0;
		while (sDate.before(eDate))
		{
			sDate.add(Calendar.DAY_OF_MONTH, 1);
			daysBetween ++;
		}
		
		while (sDate.after(eDate))
		{
			eDate.add(Calendar.DAY_OF_MONTH, 1);
			daysBetween ++;
		}
		
		return daysBetween;

It will return 22 which is not at all what was expected.

Did I make something wrong or is that an issue with the `Calendar` class ?

Android Days between two dates

I am trying to query my postgresql db to return results where a date is in certain month and year. In other words I would like all the values for a month-year. 

The only way i&#39;ve been able to do it so far is like this:

    SELECT user_id 
    FROM user_logs 
    WHERE login_date BETWEEN &#39;2014-02-01&#39; AND &#39;2014-02-28&#39;

Problem with this is that I have to calculate the first date and last date before querying the table. Is there a simpler way to do this?

Thanks 

Postgresql query between date ranges

I&#39;m developing a Java App and I have a `timeStamp` (in `long`). I can easily use this code to change it to a Gregorian date:

    Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(timeStamp);
But I need to have the date in Jalali Calendar. I searched but didn&#39;t found any good library. Do you know a reliable and good library for converting (or creating dates in Jalali format from `timeStamp`)? I don&#39;t need an implementation or an algorithm, cause this issue is too buggy and has a lot of rules, I need a reliable solution

Content Type	Original Author	Original Content on Stackoverflow
Question	Adam Moss	View Question on Stackoverflow
Solution 1 - Javascript	acarlon	View Answer on Stackoverflow
Solution 2 - Javascript	Ruslan F.	View Answer on Stackoverflow
Solution 3 - Javascript	loxxy	View Answer on Stackoverflow

JavaScript, get date of the next day

Javascript Problem Overview

Javascript Solutions

Solution 1 - Javascript

Solution 2 - Javascript

Solution 3 - Javascript

Unit testing of private functions with Mocha and Node.js

Javascript fuzzy search that makes sense

Attributions