Unshift method is like push method which works at the beginning of the array. This method is used to prepend one or more elements to the beginning of the array.
Basic Groups Of Dataypes Are
- Reference types.
- do-while loops
APC is a great operation code caching system for PHP that can help speed up your site. PHP is a dynamic server-side scripting language that needs to be parsed, compiled and executed by the server with every page request. In many cases though, the requests produce exactly the same results which means that the cloud server has to unnecessarily repeat all these steps for each of them.
This is where APC comes into play. What it does is save the PHP opcode (operation code) in the RAM memory and if requested again, executes it from there. In essence, it bypasses the parsing and compiling steps and minimizes some unnecessary loads on the cloud server.
Variable typing is used to assign a number to a variable and the same variable can be assigned to a string.
The function .call() and .apply() are very similar in their usage except a little difference. .call() is used when the number of the function’s arguments are known to the programmer, as they have to be mentioned as arguments in the call statement. On the other hand, .apply() is used when the number is not known. The function .apply() expects the argument to be an array.
The basic difference between .call() and .apply() is in the way arguments are passed to the function.
Closure is a locally declared variable related to a function which stays in memory when the function has returned.
The onload function is not run until all the information on the page is loaded. This leads to a substantial delay before any code is executed.
onDocumentReady loads the code just after the DOM is loaded. This allows early manipulation of the code.
Add “<!–” without the quotes in the code just after the <script> tag.
Add “//–>” without the quotes in the code just before the <script> tag.