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Tag: javascript

Display A Popup Only Once Per User

There have already been answers to this question but I am still unsure exactly how it works. I am using the following HTML in my footer.php: and the following Javascript: Everything works great, but I want to only show the pop up once per user (maybe using the cookie thing all the forum posts go on about) but…

Javascript toString trick in adding function. How does it work?

Can somebody explain to me how the toString trick works in the following example. The function adds all the arguments being passed for each call so add(1)(2)(3); equals 6. jsFiddle Answer Since the function is a chain function, you need to return a function to be chained which then returns itself. However, yo…

HTML canvas image from rgb values

I have three 12×12 arrays, each with R, G and B values. How would I go about outputting the image (12×12) using HTML Canvas? I’ve come across Canvas demos that show drawing lines and whatnot, but nothing like providing some RGB arrays to produce something. Any guidance is greatly appreciated. …

how to keep double quotes in twig?

I have a json array that I pass to the twig template, but the double quotes in the array have been causing trouble, my json array is like this: in twig template, I print it out like this: I expect it to be attrs: [“a”, “b”], however, what gets output is attrs: ["a", &…

What is difference between Map and Set?

JavaScript Map and Set objects are both iterable objects. Both store object by [key, value] pair. When to use which? What is the difference between them? Answer Provided you are talking about the ES6 types, they aren’t the same data structure even though the Set might be implemented with a Map. Your def…