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Articles by Nitya Raut
Page 6 of 16
What is the "double tilde" (~~) operator in JavaScript?
The “double tilde” (~~) operator is a double NOT Bitwise operator. Use it as a substitute for Math.floor(), since it’s faster.ExampleYou can try to run the following code to learn about double tilde operator − var a = 2; var b,c, d; b = ~~a; c = Math.floor(a); d = ~~b=== c; document.write(b); document.write(""+c); document.write(""+d); // They are equal
Read MoreWhat is Addition Assignment Operator (+=) in JavaScript?
It adds the right operand to the left operand and assigns the result to the left operand.ExampleYou can try to run the following code to learn how to work with Addition Assignment Operator − var a = 33; var b = 10; document.write("Value of a => (a += b) => "); result = (a += b); document.write(result); document.write(linebreak);
Read MoreHow to display an image in HTML?
Use the tag in HTML to display an image. The following are the attributes −AttributeValueDescriptionAligntopbottommiddleleftrightDeprecated− Specifies the alignment for the image.AlttextSpecifies alternate textBorderpixelsDeprecated − Specifies the width of the image border.crossorigin anonymous use-credentialsIt allows images from third-party sites that allow cross-origin access to be reused with canvas.Heightpixels or %Specifies the height of the image.hspacepixelsDeprecated − Amount of white space to be inserted to the left and right of the object.IsmapURLDefines the image as a server-side image map.LongdesctextDeprecated − Specifies a URI/URL of a long description - this can elaborate on a shorter description specified with the alt attribute.SrcURLthe url ...
Read MoreWhich event occurs in JavaScript when an element is content is copied to clipboard?
When a user copies the element’s content, then the oncopy event triggers.ExampleYou can try to run the following code to learn how to implement oncopy event in JavaScript. function copyFunction() { document.write("Text copied!"); }
Read MoreWhat is the usage of onpageshow event in JavaScript?
The onpageshow event triggers in JavaScript when a user reaches the new web page.ExampleYou can try to run the following code to learn how to implement onpageshow event in JavaScript. On first visit, a welcome message is visible. function newFunc() { alert("Welcome!"); }
Read MoreHow to read and parse CSV files in C++?
You should really be using a library to parsing CSV files in C++ as there are many cases that you can miss if you read files on your own. The boost library for C++ provides a really nice set of tools for reading CSV files. For example, example#include vector parseCSVLine(string line){ using namespace boost; std::vector vec; // Tokenizes the input string tokenizer tk(line, escaped_list_separator ('\', ', ', '\"')); for (auto i = tk.begin(); i!=tk.end(); ++i) vec.push_back(*i); return vec; } int main() { std::string line = "hello, from, ...
Read MoreWhat is the ?-->? operator in C++?
There is no such operator in C++. Sometimes, we need to create wrapper types. For example, types like unique_ptr, shared_ptr, optional and similar. Usually, these types have an accessor member function called .get but they also provide the operator→ to support direct access to the contained value similarly to what ordinary pointers do.The problem is that sometimes we have a few of these types nested into each other. This means that we need to call .get multiple times or to have a lot of dereference operators until we reach the value.Something like this −wrapper wp; wp.get().get().length(); wp.get()->length();This can be a ...
Read MoreHow can we take a backup of all the databases by using mysqldump client program?
By using mysql dump client program we can take the backup of all the databases into a file having the extension ‘.sql’. It can be understood with the help of the following example −ExampleIn this example, with the help of mysql dump client program, we are taking the backup all the databases in a file named ‘alldatabases.sql’. The following command will do this −C:\mysql\bin>mysqldump -u root --all-databases > alldatabases.sqlThe above command will create a file named alldatabases.sql which has the dump information of all the databases.
Read MoreHow can we search a record from MySQL table having a date as a value in it?
It can be understood with the help of following example in which we are using the following data from the table named ‘detail_bday’ −mysql> Select * from detail_bday; +----+---------+------------+ | Sr | Name | Birth_Date | +----+---------+------------+ | 1 | Saurabh | 1990-05-12 | | 2 | Raman | 1993-06-11 | | 3 | Gaurav | 1984-01-17 | | 4 | Rahul | 1993-06-11 | +----+---------+------------+ 4 rows in set (0.00 sec)Now, in the following two ways we can search records using the date −mysql> Select * from detail_bday Where Birth_Date = '1993-06-11'; +----+-------+------------+ | Sr | ...
Read MoreWhat is the usage of <section> and <article> elements? Why they were introduced?
The elements and are useful for screenreaders as well and help visually impaired users in reading the content of your web page. These are beneficial for eBook readers as well.Let us see how to work with both the elements. HTML Section Tag Java Inheritance Inheritance defines the relationship between superclass and subclass. Learning Learn to gain experience and try to share your knowledge with others. Web Development Tutorials Consist of CSS, HTML, and PHP tutorials for 2nd Semester exams. Academic Tutorials Consist of Computer Fundamental, Computer Network tutorials for 1st Semester exams.
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