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NOT IN vs NOT EXISTS
...o null.
This post explains it very well
http://sqlinthewild.co.za/index.php/2010/02/18/not-exists-vs-not-in/
When the subquery returns even one null, NOT IN will not match any
rows.
The reason for this can be found by looking at the details of what the
NOT IN operation actually means...
Is it secure to store passwords as environment variables (rather than as plain text) in config files
I work on a few apps in rails, django (and a little bit of php), and one of the things that I started doing in some of them is storing database and other passwords as environment variables rather than plain text in certain config files (or in settings.py, for django apps).
...
Foreign key constraints: When to use ON UPDATE and ON DELETE
... therefore NULL may be preferable for this index.
– CPHPython
Aug 29 '16 at 12:02
1
@regilero, it...
Technically, why are processes in Erlang more efficient than OS threads?
...use today have the same safety properties (ECMAScript, Java, C♯, VB.NET, PHP, Perl, Python, Ruby, Clojure, Scala, Kotlin, Groovy, Ceylon, F♯, OCaml, the "Objective" part of "Objective-C", the "++" part of "C++"). If it weren't for legacy C code, and legacy features of C++ and Objective-C, we wou...
What is the difference between a map and a dictionary?
...a, C++
"Dictionary" is used by .Net, Python
"Associative array" is used by PHP
"Map" is the correct mathematical term, but it is avoided because it has a separate meaning in functional programming.
Some languages use still other terms ("Object" in Javascript, "Hash" in Ruby, "Table" in Lua), but ...
Why do some websites add “Slugs” to the end of URLs? [closed]
...re algorithms for this, for example the one WordPress uses. I would post a PHP solution for this exact problem if more than 600 characters were allowed. If you really want to know, post it as a question and I'll be happy to answer it ;)
– Mathias Bynens
Apr 30 ...
What is Gradle in Android Studio?
...
PHING of PHP
– Yousha Aleayoub
Jul 25 '18 at 17:34
16
...
Node.js spawn child process and get terminal output live
...
PHP-like passthru
import { spawn } from 'child_process';
export default async function passthru(exe, args, options) {
return new Promise((resolve, reject) => {
const env = Object.create(process.env);
c...
Is BCrypt a good hashing algorithm to use in C#? Where can I find it? [closed]
...ed is completely irrelevant; you'd be better off mentioning something like PHP type coercing problems with hash equality checks. Plus while largely suitable in a practical sense, PBKDF2 is a KDF, not a password hashing algorithm, whereas BCrypt is better suited. Regardless, it would make much more s...
Position icons into circle
...HTML starting from an array of images. Whether the HTML is generated using PHP, JS, some HTML preprocessor, whatever... this matters less as the basic idea behind is the same.
Here's the Pug code that would do this:
//- start with an array of images, described by url and alt text
- let imgs = [
- ...