I need to calculate coefficients of polynomial using Lagrange interpolation polynomial, as my homework, I decide to do this in Javascript. here is definition of Lagrange polynomial (L(x)) Lagrange basis polynomials are defined as follows Calculate y value for specific X (W(x) function) is simple but I need to…
Tag: javascript
Raphaël Object: Simulate click
It it possible to simulate an click on an Raphaël object? I tried already Answer Just access the DOM node using Element.node as described in the docs. You can then trigger events on the node as you would with any other DOM element http://jsfiddle.net/UFZXP/ http://lifescaler.com/2008/04/simulating-mouse-click…
How to control animate function on button click?
I have two divs named “arrow” and “inner”. I am trying to control the animate slide function when the div is clicked but have been unfortunate. The issue is noticeable when clicking very fast on the “arrow” div after user stops clicking the div is still sliding. I set the a…
check if number string contains decimal?
After doing a sqrt() How can I be check to see if the result contains only whole numbers or not? I was thinking Regex to check for a decimal – if it contains a decimal, that means it didn’t root evenly into whole numbers. Which would be enough info for me. but this code isnt working… I bet t…
Ways to save Backbone.js model data?
I am more into front end development and have recently started exploring Backbone.js into my app. I want to persist the model data to the server. Could you please explain me the various way to save the Model data (using json format). I am using Java on server side. Also I have mainly seen REST being used to s…
jQuery 1.7.1 “on” function does not work with regular Javascript event trigger
I register the following function In my IE console I did and it says element this does not have property or value. I am trying to run automation test using What are ways around this? In IE I get JavaScript error popping up, thus stopping rest of the test. Answer Thanks I found the answer. I had to use even
Javascript array search and remove string?
I have: I want to be able to do something like: array.remove(“B”); but there is no remove function. How do I accomplish this? Answer I’m actually updating this thread with a more recent 1-line solution: The idea is basically to filter the array by selecting all elements different to the elem…
Set a default sort column in SlickGrid
I’m using SlickGrid with DataView and I’m trying to set a default sort column on my table. Is there a way to trigger the sort or set an option so the column is sorted on load? Answer On the latest version you could do this: You can also set multiple with setSortColumn*s*
How to select all children of an element with javascript and change CSS property?
I am working on a project that has a div with 32 children. I need to create a dropdown menu that will change the background of each div and the parent. For the other parts of the project that don’t have children, I have been using the following code: HTML: I could just add a different ID to each child
javascript shifting issue (rgb and rgba to hex)
I found a RGB to hex converter and I’m trying to make a RGBA to hex converter. The original rgb2hex function works but the new rgba2hex function does not. What am I doing wrong? The rgba function is returning gba, no r. Example: Current output: ff9b2d and 9b2dff Expected output:ff9b2d and ff9b2dff Answe…