Notices tagged with javascript, page 7

♲ @starbreaker@mastodon.sdf.org: #PSA: It's possible to detect #AdBlocking plugins using #JavaScript. Instead, you should use a #HostsFile to block ads by redirecting ad server DNS queries.

You can download a hosts file from <github.com/StevenBlack/hosts>.

Windows users should refer to <helpdeskgeek.com/how-to/block-…>, too.

Mobile users are going to need a VPN and an adblocking DNS server like AdGuard's. <adguard.com/en/adguard-dns/ove…> or PiHole <pi-hole.net/>.

In JavaScript the "empty" regular expression literal is written `/(?:)/` since the parser would erroneously take `//` as the start of a single-line comment

https://www.ecma-international.org/ecma-262/5.1/#sec-7.8.5
#JavaScript #ECMA #Empty #RegExp

Nice illustration of several random shuffle algorithms, including Fisher–Yates Shuffle:
https://bost.ocks.org/mike/shuffle/
by Mike Bostock (https://twitter.com/mbostock)

#Random #Shuffle #JavaScript #Array

If you like writing your JavaScript code in a functional style, you may already know the `Array.map` and `Array.filter` methods.
But is there a way to combine them? And will this be a more efficient solution?
http://www.yesik.it/blog/2018-javascript-map-filter-and-reduce-compared

#JavaScript #FunctionalStyle #Array #Filter #Map #Reduce

Did you know we have no less than 83 good first issues in our issue tracker? Those are great to get started with if you want to help make #nextcloud better! #javascript #PHP #CSS
https://github.com/nextcloud/server/issues?q=is%3Aopen+is%3Aissue+label%3A%22good+first+issue%22

#Javascript doesn't have a built-in method to get the #epsilon of a number. It only has the epsilon of 1.

The way to get the epsilon of any other number is

\[
2^{\lfloor \log_2 x\rfloor} \epsilon
\]

or Math.pow(2, Math.floor(Math.log(x)/Math.log(2)))*Number.EPSILON for you non-mathjaxed instance dwellers.

Isn't there a cleaner way?

That moment when you realize that prod builds of your application are broken due to a transient dependency, and as long as you have a carefully set up `yarn.lock`, things work. But as soon as you try to regenerate it, all hell breaks loose.

I'm not sure I have the spoons for this today, so I'm going to commit the carefully set up `yarn.lock` and worry about the reproducibility sometime later.

The #JavaScript ecosystem is... weird.

:flan_on_fire:

In JavaScript the "empty" regular expression literal is written `/(?:)/` since the parser would erroneously take `//` as the start of a single-line comment

https://www.ecma-international.org/ecma-262/5.1/#sec-7.8.5
#JavaScript #ECMA #Empty #RegExp

#Akasha are developing a #FreeCode social app based on #Ethereum and #IPFS. They are currently looking for a #Javascript engineer, backend engineer, and fullstack developer:
https://akasha.org/careers/ #PaidWork