     long unixTime = System.currentTimeMillis() / 1000L;

It&#39;s quite simple:

    long timestamp = Calendar.getInstance().getTime() / 1000;

    long timeStamp = Calender.getInstance().getTime() / 1000L ;

I have a column that is currently `varchar(100)` and I want to make it `10000`.

is it as simple as 

    alter table table_name set column col_name varchar (10000);

I am afraid to corrupt the exiting data. Will I be ok if I run this query? Or should I do I `alter` the column another way?

Thanks!

MySQL - How to increase varchar size of an existing column in a database without breaking existing data?

Surprisingly simple/stupid/basic question, but I have no idea: Suppose I want to return the user of my function a C-string, whose length I do not know at the beginning of the function.  I can place only an upper bound on the length at the outset, and, depending on processing, the size may shrink.  

The question is, is there anything wrong with allocating enough heap space (the upper bound) and then terminating the string well short of that during processing?  i.e. If I stick a &#39;\0&#39; into the middle of the allocated memory, does (a.) `free()` still work properly, and (b.) does the space after the &#39;\0&#39; become inconsequential?  Once &#39;\0&#39; is added, does the memory just get returned, or is it sitting there hogging space until `free()` is called?  Is it generally bad programming style to leave this hanging space there, in order to save some upfront programming time computing the necessary space before calling malloc?

To give this some context, let&#39;s say I want to remove consecutive duplicates, like this: 

input &quot;Hello oOOOo  !!&quot; --&gt; output &quot;Helo oOo !&quot;

... and some code below showing how I&#39;m pre-computing the size resulting from my operation, effectively performing processing twice to get the heap size right.

    char* RemoveChains(const char* str)
    {
    	if (str == NULL) {
	    	return NULL;
	    }
	    if (strlen(str) == 0) {
	    	char* outstr = (char*)malloc(1);
	    	*outstr = &#39;\0&#39;;
	    	return outstr;
	    }
	    const char* original = str; // for reuse
	    char prev = *str++;       // [prev][str][str+1]...
	    unsigned int outlen = 1;  // first char auto-counted

	    // Determine length necessary by mimicking processing
	    while (*str) {
	    	if (*str != prev) { // new char encountered
		    	++outlen;
	    		prev = *str; // restart chain
		    }
		    ++str; // step pointer along input
	    }

	    // Declare new string to be perfect size
	    char* outstr = (char*)malloc(outlen + 1);
	    outstr[outlen] = &#39;\0&#39;;
	    outstr[0] = original[0];
	    outlen = 1;

	    // Construct output
	    prev = *original++;
	    while (*original) {
		    if (*original != prev) {
		    	outstr[outlen++] = *original;
		    	prev = *original;
		    }
		    ++original;
	    }
    	return outstr;
    }


What happens to memory after &#39;\0&#39; in a C string?

How do I create a Unix timestamp on Android?

I want to create a URL post request with a Unix timestamp on the end of the url.

How do I create a Unix timestamp on Android?

<p>How do I create a Unix timestamp on Android?</p>
<p>I want to create a URL post request with a Unix timestamp on the end of the url.</p>


I have a bitmap that I want to send to the server by encoding it to base64 but I do not want to compress the image in either png or jpeg.

Now what I was previously doing was.

    ByteArrayOutputStream byteArrayBitmapStream = new ByteArrayOutputStream();
    bitmapPicture.compress(Bitmap.CompressFormat.PNG, COMPRESSION_QUALITY, byteArrayBitmapStream);
    byte[] b = byteArrayBitmapStream.toByteArray();
    //then simple encoding to base64 and off to server
    encodedImage = Base64.encodeToString(b, Base64.NO_WRAP);

Now I just dont want to use any compression nor any format plain simple byte[] from bitmap that I can encode and send to the server.

Any pointers?

Converting bitmap to byteArray android

if I use openFileOutput() to create and write to a temp file how do I get filesize after I&#39;m done writing to it?

how do I get file size of temp file in android?

I am using an EditText widget, and I am validating it with the `setError()` method of EditText and it validates correctly. 

But I have an button in the same screen that redirects to another activity. And when I press back button and come back to the screen the validation still appears.

So on the activity `OnPause` event I want to remove the validation of the EditText. How is it possible.




  

Remove the error indicator from a previously-validated EditText widget

I want to display an alert dialog in my app. I am using fragments. I tried the below code to do this:

 

     AlertDialog ad = new AlertDialog.Builder(context)
				.create();
		ad.setCancelable(false);
		ad.setTitle(title);
		ad.setMessage(message);
		ad.setButton(context.getString(R.string.ok_text), new DialogInterface.OnClickListener() {

			public void onClick(DialogInterface dialog, int which) {
				dialog.dismiss();
			}
		});
    ad.show();
but it was crashing and the error in logcat was:

 
 &gt; 04-18 15:23:01.770: E/AndroidRuntime(9424): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application

From internet I came to know that the crash is due to context issue. I had given context as

    context = this.getActivity().getApplicationContext();

I don&#39;t know what is the problem with this. Can anybody help me?	

How to display AlertDialog in a Fragment?

Is it possible to do something like this in Java for Android (this is a pseudo code)

    IF (some_string.equals(&quot;john&quot; OR &quot;mary&quot; OR &quot;peter&quot; OR &quot;etc.&quot;){
       THEN do something
    }

?

At the moment this is done via multiple `String.equals()` condition with `||` among them. 

String.equals() with multiple conditions (and one action on result)

I have a Unix timestamp like this:

    $timestamp=1330581600

How do I get the beginning of the day and the end of the day for that timestamp?

    e.g.
    $beginOfDay = Start of Timestamp&#39;s Day
    $endOfDay = End of Timestamp&#39;s Day

I tried this:

    $endOfDay = $timestamp + (60 * 60 * 23);

But I don&#39;t think it&#39;ll work because the timestamp itself isn&#39;t the exact beginning of the day.


Given a Unix timestamp, how to get beginning and end of that day?

How do I convert the following format to unix timestamp?

    Apr 15 2012 12:00AM

The format I get from DB seems to have `AM` at the end. 
I&#39;ve tried using the following but it did not work:

    CONVERT(DATETIME, Sales.SalesDate, 103) AS DTSALESDATE,  
    CONVERT(TIMESTAMP, Sales.SalesDate, 103) AS TSSALESDATE

    where Sales.SalesDate value is Apr 15 2012 12:00AM

MySQL convert date string to Unix timestamp

How can I convert normal date `2012.08.10` to unix timestamp in javascript?

Fiddle: http://jsfiddle.net/J2pWj/
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
I&#39;ve seen many posts here that convert it in PHP, Ruby, etc... But I need to do this inside JS.

Convert normal date to unix timestamp

If my Unix machine is set to IST timezone, how can I get the current GMT time?

How do I get GMT time in Unix?

I am making a countdown timer for an event page, i used moment js for this.  

Here is [fiddle][1] for this.

I am calculating date difference between event date and current date (timestamp), then using &quot;duration&quot; method from moment js.  But the time left is not coming as expected.  
**Expected** - 00:30m:00s  
**Actual** - 5h:59m:00s  

Code :   
 

    &lt;script&gt;
      $(document).ready(function(){
    
        var eventTime = &#39;1366549200&#39;;
        var currentTime = &#39;1366547400&#39;;
        var time = eventTime - currentTime;
        var duration = moment.duration(time*1000, &#39;milliseconds&#39;);
        var interval = 1000;
    
        setInterval(function(){
          duration = moment.duration(duration.asMilliseconds() - interval, &#39;milliseconds&#39;);
          $(&#39;.countdown&#39;).text(moment(duration.asMilliseconds()).format(&#39;H[h]:mm[m]:ss[s]&#39;));
        }, interval);
      });
      &lt;/script&gt;

I read the momentjs documentation to figure out the problem, but no luck.

Thanks for your time.


**Update :**    

I end up doing like this :   
 
    &lt;script&gt;
      $(document).ready(function(){
    
        var eventTime = &#39;1366549200&#39;;
        var currentTime = &#39;1366547400&#39;;
        var leftTime = eventTime - currentTime;//Now i am passing the left time from controller itself which handles timezone stuff (UTC), just to simply question i used harcoded values.
        var duration = moment.duration(leftTime, &#39;seconds&#39;);
        var interval = 1000;
    
        setInterval(function(){
          // Time Out check
          if (duration.asSeconds() &lt;= 0) {
            clearInterval(intervalId);
            window.location.reload(true); #skip the cache and reload the page from the server
          }

          //Otherwise
          duration = moment.duration(duration.asSeconds() - 1, &#39;seconds&#39;);
          $(&#39;.countdown&#39;).text(duration.days() + &#39;d:&#39; + duration.hours()+ &#39;h:&#39; + duration.minutes()+ &#39;m:&#39; + duration.seconds() + &#39;s&#39;);
        }, interval);
      });
      &lt;/script&gt;

[JS Fiddle][2].


  [1]: http://jsfiddle.net/wt812nfo/
  [2]: http://jsfiddle.net/arpit/cxyms

Content Type	Original Author	Original Content on Stackoverflow
Question	iamlukeyb	View Question on Stackoverflow
Solution 1 - Android	Nesim Razon	View Answer on Stackoverflow
Solution 2 - Android	Aleks G	View Answer on Stackoverflow
Solution 3 - Android	Deepak Shukla	View Answer on Stackoverflow

How do I create a Unix timestamp on Android?

Android Problem Overview

Android Solutions

Solution 1 - Android

Solution 2 - Android

Solution 3 - Android

What happens to memory after '\0' in a C string?

MySQL - How to increase varchar size of an existing column in a database without breaking existing data?

Attributions