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Nullable Foreign Key bad practice?
Let's say you have a table Orders with a foreign key to a Customer Id. Now, suppose you want to add an Order without a Customer Id, (whether that should be possible is another question) you would have to make the foreign key NULL... Is that bad practice or would you rather work with a link table bet...
How do I redirect in expressjs while passing some context?
...ion(req, res) {
var passedVariable = req.query.valid;
// Do something with variable
});
For more dynamic way you can use the url core module to generate the query string for you:
const url = require('url');
app.get('/category', function(req, res) {
res.redirect(url.format({
pat...
Database, Table and Column Naming Conventions? [closed]
...r I design a database, I always wonder if there is a best way of naming an item in my database. Quite often I ask myself the following questions:
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Allowed memory size of 33554432 bytes exhausted (tried to allocate 43148176 bytes) in php
...ne before the line where you get error in your php file
ini_set('memory_limit', '-1');
It will take unlimited memory usage of server, it's working fine.
Consider '44M' instead of '-1' for safe memory usage.
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What is the “right” JSON date format?
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JSON itself does not specify how dates should be represented, but JavaScript does.
You should use the format emitted by Date's toJSON method:
2012-04-23T18:25:43.511Z
Here's why:
It's human readable but also succinct
It sorts...
MySQL maximum memory usage
I would like to know how it is possible to set an upper limit on the amount of memory MySQL uses on a Linux server.
6 Answ...
Is there a .NET equivalent to Apache Hadoop? [closed]
So, I've been looking at Hadoop with keen interest, and to be honest I'm fascinated, things don't get much cooler.
15 Ans...
Adjust width and height of iframe to fit with content in it
...on for auto-adjusting the width and height of an iframe to barely fit its content. The point is that the width and height can be changed after the iframe has been loaded. I guess I need an event action to deal with the change in dimensions of the body contained in the iframe.
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When to use an interface instead of an abstract class and vice versa?
...ng what an object is.
When we talk about an interface and define capabilities that we promise to provide, we are talking about establishing a contract about what the object can do.
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improv...
Seeding the random number generator in Javascript
Is it possible to seed the random number generator (Math.random) in Javascript?
13 Answers
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