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Articles by Anvi Jain
Page 6 of 43
How to create a new img tag with JQuery, with the src and id from a JavaScript object?
To create a new img tag in JavaScript, pass an HTML string to the constructor,var myImg = $(''); $(document.createElement(myImg)); myImg.attr('src', responseObject.imgurl);You can also use the following code to create a new img tag with the attributes like src, id, etc −var myImg = $('', { id: 'id1', src: exampleimg.png', alt: 'Alt text' });
Read MoreHow to set the left padding of an element with JavaScript?
Use the paddingLeft property in JavaScript to set the left padding. You can try to run the following code to return the left padding of an element with JavaScript −Example #box { border: 2px solid #FF0000; width: 150px; height: 70px; } This is demo text. Left padding function display() { document.getElementById("box").style.paddingLeft = "100px"; }
Read MoreWith JavaScript RegExp find a character except newline?
To find a character except for a newline, use the Metacharacter. (period). You can try to run the following code to find a character −Example JavaScript Regular Expression var myStr = "We provide websites! We provide content!"; var reg = /p.o/g; var match = myStr.match(reg); document.write(match);
Read MoreHow objects are organized in a web document? How is it arranged in a hierarchy?
The Objects are organized in a hierarchy. This hierarchical structure applies to the organization of objects in a Web document.Window object − Top of the hierarchy. It is the utmost element of the object hierarchy.Document object − Each HTML document that gets loaded into a window becomes a document object. The document contains the contents of the page.Form object − Everything enclosed in the ... tags sets the form object.Form control elements − The form object contains all the elements defined for that object such as text fields, buttons, radio buttons, and checkboxes.The following is a simple hierarchy of a ...
Read MoreWhat is the difference between custom and built-in functions in JavaScript?
The custom functions in JavaScript are user-defined functions. JavaScript allows us to write our own functions. The following is the syntax −Syntax Bult-in functions are functions already provided by JavaScript library, for example, the following are string functions −S. NoMethod & Description1charAt()Returns the character at the specified index.2charCodeAt()Returns a number indicating the Unicode value of the character at the given index.3concat()Combines the text of two strings and returns a new string.4indexOf()Returns the index within the calling String object of the first occurrence of the specified value, or -1 if not found.ExampleThe following is an example of a built-in ...
Read MoreHow to write a Regular Expression in JavaScript to remove spaces?
To remove spaces in JavaScript, you can try to run the following regular expression. It removes the spaces from a string −Example Live Demo var str = "Welcome to Tutorialspoint"; document.write(str); //Removing Spaces document.write(""+str.replace(/\s/g, '')); Output
Read MoreHow can we get the summary output of a column in MySQL result set itself?
We can get the summary output of a column in MySQL result set by using the “WITH ROLLUP” modifier. This modifier is used with GROUP BY CLAUSE. It gives the summary output to include extra rows that represent higher-level summary operations.ExampleIn this example, the WITH ROLLUP modifier gave the summary output with total cost value in the extra row.mysql> Select Item_name, SUM(Cost) AS Total_cost from Item_list GROUP BY Item_name WITH ROLLUP; +-----------+------------+ | Item_name | Total_cost | +-----------+------------+ | Notebook | 45.00 | | Pen | 31.70 | | Pencilbox | 125.20 | | NULL | 201.90 | +-----------+------------+ 4 rows in set (0.00 sec)
Read MoreCreate a MySQL stored procedure which fetches the rows from a table by using a cursor?
Following is a stored procedure which fetches the records from name column of table ‘student_info’ having the following data −mysql> Select * from Student_info; +-----+---------+------------+------------+ | id | Name | Address | Subject | +-----+---------+------------+------------+ | 101 | YashPal | Amritsar | History | | 105 | Gaurav | Chandigarh | Literature | | 125 | Raman | Shimla | Computers | | 127 | Ram | Jhansi | Computers | +-----+---------+------------+------------+ 4 rows in set (0.00 sec) mysql> Delimiter // mysql> CREATE PROCEDURE cursor_defined(OUT val ...
Read MoreHow can we see the source code of a particular MySQL stored procedure?
With the help of SHOW CREATE PROCEDURE statement, we can see the source code of a stored procedure. To make it understand we are using the stored procedure named allrecords() in the query as follows −mysql> Show Create Procedure allrecords\G *************************** 1. row *************************** Procedure: allrecords sql_mode:ONLY_FULL_GROUP_BY, STRICT_TRANS_TABLES, NO_ZERO_IN_DATE, NO_ZERO_DATE, ERROR_FOR_DIVISION_BY_ZERO, NO_AUTO_CREATE_USER, NO_ENGINE_SUBSTITUTION Create Procedure: CREATE DEFINERb=`root`@`localhost` PROCEDURE `allrecords`() BEGIN Select * from Student_info; END character_set_client: cp850 collation_connection: cp850_general_ci Database Collation: latin1_swedish_ci 1 row in set (0.00 sec)
Read MoreWhat are the basic rules and idioms for operator overloading in C++?
When it comes to operator overloading in C++, there are 3 basic rules you should follow. like all such rules, there are so exceptions. These 3 rules are −1. Whenever the meaning of an operator is not obviously clear and undisputed, it should not be overloaded. Instead, provide a function with a well-chosen name. Basically, the first and foremost rule for overloading operators, at its very heart, says:Don’t do it.That might seem strange, but there are only a few cases where operator overloading is appropriate. The reason is, it is hard to understand the semantics behind the application of an ...
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