Are all statements also expressions? “Wherever JavaScript expects a statement, you can also write an expression. Such a statement is called an expression statement. The reverse does not hold: you cannot write a statement where JavaScript expects an expression. For example, an if statement cannot become the argument of a function.” This is comes from … Read more
I’ll address any questions you have… but here is an improved pattern you should follow to reduce code duplication. As a sidenote though, you should consider not doing pagination on client-side. Since if you have a huge dataset, it would mean you need to download all the data before your page loads. Better to implement … Read more
Let’s say I have an array of four objects: Is there a way that I can get the third object ({a: 5, b: 6}) by the value of the property b for example without a for…in loop?
You can get the coordinate of the target element and set the scroll position to it. But this is so complicated. Here is a lazier way to do that: This uses replaceState to manipulate the url. If you also want support for IE, then you will have to do it the complicated way: Demo: http://jsfiddle.net/DerekL/rEpPA/Another … Read more
To keep the promise chain going, you can’t use setTimeout() the way you did because you aren’t returning a promise from the .then() handler – you’re returning it from the setTimeout() callback which does you no good. Instead, you can make a simple little delay function like this: And, then use it like this: Here … Read more
The g in the regular expression (short for global) says to search the whole string rather than just find the first occurrence. This matches is twice: Expand snippet And, if there are no matches, it returns 0:
You can use ajax to call a server page (PHP / ASP /ASP.NET/JSP ) and in that server page you can execute a query. http://api.jquery.com/jQuery.ajax/ HTML Javascript This code will be excuted when user clicks on the button with the id “btnVote”. The below script is making use of the “ajax” function written in the … Read more
Can any one help me sort a 2 dimensional Array in JavaScript? It will have data in the following format: It should look like this when sorted: So basically, sorting by the first column. Cheers
By the time script is executed, document element is not available yet, because script itself is in the head. While it’s a valid solution to keep script in head and render on DOMContentLoaded event, it’s even better to put your script at the very bottom of the body and render root component to a div … Read more
How about this? P.S. You should place hello() above of the button.