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Rishi Rathor has Published 142 Articles

Rishi Rathor
1K+ Views
It is because inserting an empty string means that we are inserting some value and not NULL. The empty string apparently maps to zero as an integer. In other words, we can say that by inserting empty string we are providing a value to MySQL that has integer representation as ... Read More

Rishi Rathor
3K+ Views
C++ provides two pointer operators, which are Address of Operator (&) and Indirection Operator (*). A pointer is a variable that contains the address of another variable or you can say that a variable that contains the address of another variable is said to "point to" the other variable. A ... Read More

Rishi Rathor
280 Views
We need to use ‘mysqlshow’ client program along with the name of the database to get the list of tables in a particular database. Its syntax would be as follows −Mysqlshow – u root db_name [pat_matching]Here db_name would be the name of the database from which we want to get ... Read More

Rishi Rathor
507 Views
If you want to draw part of an image inside canvas, the image onload function only fires once when the image first loads into the browser. Let us see the example:$(document).ready(function () { var cw1 = 200; var ch1 = 300; var ctx1 = $("#myCanvas")[0].getContext("3d"); var myImg1 ... Read More

Rishi Rathor
407 Views
No, you will not be able to prevent the prompt. It is a security feature because not every user would want to share its location.As stated by W3C:A conforming implementation of this specification must provide a mechanism that protects the user's privacy and this mechanism should ensure that no location ... Read More

Rishi Rathor
362 Views
Two-way communication between the browsing contexts is called channel messaging. It is useful for communication across multiple origins.While creating messageChannel, it internally creates two ports to send the data and forwarded to another browsing context.postMessage() − Post the message throw channelstart() − It sends the dataclose() − it close the ... Read More

Rishi Rathor
141 Views
We can use both the format characters together in DATE_FORMAT() function. The following example will clarify this −mysql> SELECT DATE_FORMAT(NOW(), 'The time is %a %h:%i:%s:%f %p'); +-----------------------------------------------------+ | DATE_FORMAT(NOW(), 'The time is %a %h:%i:%s:%f %p') | +-----------------------------------------------------+ | The time is Sun 06:35:06:000000 AM ... Read More

Rishi Rathor
335 Views
To draw image onto the canvas, use the HTML5 drawImage() method: function drawShape(){ // get the canvas element using the DOM var canvas = document.getElementById('mycanvas'); ... Read More

Rishi Rathor
326 Views
After enabling the SQL MODE to ALLOW_INVALID_DATES, MySQL will also be able to store invalid dates in the table. The example is given below to understand it −mysql> Insert into order1234(ProductName, Quantity, Orderdate) values('B', 500, '2015-11-31'); Query OK, 1 row affected (0.06 sec) mysql> Select * from order1234; +-------------+----------+--------------+ ... Read More