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user authentication libraries for node.js?
...tion for a user (using a custom backend auth DB), and associate that user with a session.
15 Answers
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Computed / calculated / virtual / derived columns in PostgreSQL
...computed columns" of SQL Server.
STORED generated columns are introduced with Postgres 12. Trivial example:
CREATE TABLE tbl (
int1 int
, int2 int
, product bigint GENERATED ALWAYS AS (int1 * int2) STORED
);
db<>fiddle here
VIRTUAL generated columns may come with one of the next i...
Text overflow ellipsis on two lines
I know you can use a combination of CSS rules to make text end with ellipsis (...) when it's time to overflow (get out of parent's bounds).
...
Checking if a blob exists in Azure Storage
...got a very simple question (I hope!) - I just want to find out if a blob (with a name I've defined) exists in a particular container. I'll be downloading it if it does exist, and if it doesn't then I'll do something else.
...
Cropping an UIImage
...ve mentioned, this method doesn't take rotation into account; read some additional answers and spread some upvote love around to keep the responses to this question helpful for everyone.
Original response:
I'm going to copy/paste my response to the same question elsewhere:
There isn't a simple cl...
CSS background image alt attribute
... have not had to tackle before. I need to use alt tags on all images in a site including those used by CSS background-image attribute.
...
AngularJS $http and $resource
... is for general purpose AJAX. In most cases this is what you'll be using. With $http you're going to be making GET, POST, DELETE type calls manually and processing the objects they return on your own.
$resource wraps $http for use in RESTful web API scenarios.
Speaking VERY generally: A RESTful...
What are all the common undefined behaviours that a C++ programmer should know about? [closed]
...ts or deleted objects)
Dereferencing a pointer that has not yet been definitely initialized
Performing pointer arithmetic that yields a result outside the boundaries (either above or below) of an array.
Dereferencing the pointer at a location beyond the end of an array.
Converting pointers to objec...
How many spaces will Java String.trim() remove?
...
All of them.
Returns:
A copy of this string with leading and trailing white space removed, or this string if it has no leading or trailing white space.
~ Quoted from Java 1.5.0 docs
(But why didn't you just try it and see for yourself?)
...
use localStorage across subdomains
I'm replacing cookies with localStorage on browsers that can support it (anyone but IE). The problem is site.com and www . site.com store their own separate localStorage objects. I believe www is considered a subdomain (a stupid decision if you ask me). If a user was originally on site.com a...