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Number.sign() in javascript
Wonder if there are any nontrivial ways of finding number's sign ( signum function )?
May be shorter / faster / more elegant solutions than the obvious one
...
write a shell script to ssh to a remote machine and execute commands
... AWX which is the open-source edition of their commercial Tower.
Ansible: https://www.ansible.com/
AWX:https://github.com/ansible/awx
Ansible Tower: commercial product, you will probably fist explore the free open-source AWX, rather than the 15days free-trail of Tower
...
What's the best way to retry an AJAX request on failure using jQuery?
...what tells JQuery to retry $.ajax requests
// Ideas for this borrowed from https://stackoverflow.com/a/12446363/491553
$.ajaxPrefilter(function(opts, originalOpts, jqXHR) {
if(opts.retryCount === undefined) {
opts.retryCount = 3;
}
// Our own deferred object to handle done/fail callbacks
...
When and why I should use session_regenerate_id()?
...cation transitions.
Further reading:
http://php.net/session_regenerate_id
https://www.owasp.org/index.php/Session_fixation
http://en.wikipedia.org/wiki/Session_fixation
https://wiki.php.net/rfc/precise_session_management
s...
What is the non-jQuery equivalent of '$(document).ready()'?
...nsole.log("DOM is ready, come and get it!"));
Additional Readings
https://developer.mozilla.org/en-US/docs/Web/Events/DOMContentLoaded
Checking whether loading is already complete
https://developer.mozilla.org/en-US/docs/Web/API/Document/readyState
Update
Here's some quick utility h...
Rails: create on has_one association
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
WebSockets vs. Server-Sent events/EventSource
...to note:
I have had issues with websockets and corporate firewalls. (Using HTTPS helps but not always.)
See https://github.com/LearnBoost/socket.io/wiki/Socket.IO-and-firewall-software
https://github.com/sockjs/sockjs-client/issues/94
I assume there aren't as many issues with Server-Sent Events. B...
Loading/Downloading image from URL on Swift
...ypically from a nib.
print("Begin of code")
let url = URL(string: "https://cdn.arstechnica.net/wp-content/uploads/2018/06/macOS-Mojave-Dynamic-Wallpaper-transition.jpg")!
downloadImage(from: url)
print("End of code. The image will continue downloading in the background and it will b...
Why do we need message brokers like RabbitMQ over a database like PostgreSQL?
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
How do I update each dependency in package.json to the latest version?
...y adjusts a package.json with the
latest version of all dependencies
see https://www.npmjs.org/package/npm-check-updates
$ npm install -g npm-check-updates
$ ncu -u
$ npm install
[EDIT] A slightly less intrusive (avoids a global install) way of doing this if you have a modern version of npm is...