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Articles by Ricky Barnes
Page 9 of 9
Evolution of Data Models
Managing data was the key and was essential. Therefore, data model originated to solve the file system issues. Here are the Data Models in DBMS −Hierarchical ModelIn Hierarchical Model, a hierarchical relation is formed by collection of relations and forms a tree-like structure.The relationship can be defined in the form of parent child type.One of the first and most popular Hierarchical Model is Information Management System (IMS), developed by IBM.ExampleThe hierarchy shows an Employee can be an Intern, on Contract or Full- Time. Sub-levels show that Full-Time Employee can be hired as a Writer, Senior Writer or Editor:AdvantagesThe design of ...
Read MoreWhat is the difference between jQuery.load() and jQuery.ajax() methods in jQuery?
jQuery ajax() methodThe jQuery.ajax( options ) method loads a remote page using an HTTP request. $.ajax() returns the XMLHttpRequest that it creates. In most cases you won't need that object to manipulate directly, but it is available if you need to abort the request manually.Here is the description of all the parameters used by this method −options − A set of key/value pairs that configure the Ajax request. All options are optional.Assuming we have the following HTML content in result.html file −THIS IS RESULT...ExampleThe following is an example showing the usage of this method. Here, we make use of success handler to ...
Read MoreWhat is the difference between jQuery.post() and jQuery.get() methods in jQuery?
jQuery post() methodThe jQuery.post( url, [data], [callback], [type] ) method loads a page from the server using a POST HTTP request.Assuming we have following PHP content in result.php file, ExampleThe following is the code snippet showing the usage of this method − $(document).ready(function() { ...
Read MoreWhat is GRUB in Linux?
The GRUB (Grand Unified Bootloader) is a bootloader available from the GNU project. A bootloader is very important as it is impossible to start an operating system without it. It is the first program which starts when the program is switched on. The bootloader transfers the control to the operating system kernel. GRUB Features GRUB is the default bootloader for many of the Linux distributions. This is because it is better than many of the previous versions of the bootloaders. Some of its features are: GRUB supports LBA (Logical Block Addressing Mode) which puts the addressing conversion used ...
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