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Why is my variable unaltered after I modify it inside of a function? - Asynchronous code reference
...being assigned or passed as an argument. That is what we call a callback.
Now the question is, when is that callback called?
It depends on the case. Let's try to trace some common behavior again:
img.onload may be called sometime in the future, when (and if) the image has successfully loaded.
se...
Why are Docker container images so large?
...s base on Alpine.
UPDATE: the official Docker images are based on alpine now so they are good to use now.
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Saving enum from select in Rails 4.1
...arkling</option>
</select>
Values went from "0" to "red" and now we're all set.
If you're using a regular ol' rails text_field it's:
f.select :color, Wine.colors.keys.to_a
If you want to have clean human-readable attributes you can also do:
f.select :color, Wine.colors.keys.ma...
How do I set up email confirmation with Devise?
...devise:views # global
rails generate devise:views users # scoped
You can now override the mailer views in devise/mailer/confirmation_instructions.html.erb or users/mailer/confirmation_instructions.html.erb depending on your setup
4. For development environment add the following config lines in /c...
Converting .NET DateTime to JSON [duplicate]
...r, that's fine too, but if that means you're doing substring + validation, now you're into multiple lines of code (hopefully in a separate function) which means more things that can go wrong and more programmer time spent (programmers being more expensive than CPUs).
– gregmac
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PreparedStatement with list of parameters in a IN clause [duplicate]
...the select string (the 'IN (?)' part) by a simple for loop as soon as you know how many values you need to put inside the IN clause. You can then instantiate the PreparedStatement.
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Error “The goal you specified requires a project to execute but there is no POM in this directory” a
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Since when do I need quotes? I am so puzzled right now, and relieved to finally find an answer to such a rubbish error message ...
– BAERUS
Jan 4 '18 at 19:50
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How to create an installer for a .net Windows Service using Visual Studio
...operties as you need such as service name and user that it should run as.
Now you need to make a setup project. The best thing to do is use the setup wizard.
Right click on your solution and add a new project: Add > New Project > Setup and Deployment Projects > Setup Wizard
a. This could ...
Best way to make Java's modulus behave like it should with negative numbers?
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Cool, didn't know about that one. Java 8 definitively fixed a few PITA's.
– Franz D.
Jun 4 '18 at 12:57
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Adding VirtualHost fails: Access Forbidden Error 403 (XAMPP) (Windows 7)
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Okay: This is what I did now and it's solved:
My httpd-vhosts.conf looks like this now:
<VirtualHost dropbox.local:80>
DocumentRoot "E:/Documenten/Dropbox/Dropbox/dummy-htdocs"
ServerName dropbox.local
ErrorLog "logs/dropbox.local...