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What does the Java assert keyword do, and when should it be used?
... I don't agree. Many of my assertions are used to make sure my API is getting called correctly. For example, I might write a private method that should only be called when an object holds a lock. If another developer calls that method from part of the code that doesn't lock the object, t...
What is a callback function?
...rvices to respond. Being aware of this, the service providers often design APIs using the callback pattern.
JavaScript supports callbacks very nicely e.g. with lambdas and closures. And there is a lot of activity in the JavaScript world, both on the browser as well as on the server. There are even ...
Add Keypair to existing EC2 instance
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sudo umount /vol-a
sudo rmdir /vol-a
Now, back on your system with ec2-api-tools, continue moving the EBS volume back to it’s home on the original instance A and start the instance again:
ec2-detach-volume $volume
ec2-attach-volume --instance $instance_a --device /dev/sda1 $volume
ec2-start-i...
How can you do anything useful without mutable state?
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@MichaelOsofsky, when interacting with databases and APIs, there is always an 'outside world' which has state to communicate with. In this case, you cannot go 100% functional. It is important to keep this 'unfunctional' code isolated and abstracted away so there is only one ent...
How can I reliably determine the type of a variable that is declared using var at design time?
... of a possible 'interface' if you already had the compiler available as an API to call into.
The other route
What is an optional value in Swift?
...to nil in Swift — there are no pointers, and no null pointers. But in an API, you often want to be able to indicate either a specific kind of value, or a lack of value — e.g. does my window have a delegate, and if so, who is it? Optionals are Swift's type-safe, memory-safe way to do this.
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What are the main disadvantages of Java Server Faces 2.0?
...ML/CSS/JS, server side versus client side, etc) and the basic Java Servlet API (request/response/session, forwarding/redirecting, etc), no serious disadvantages comes to mind. JSF in its current release still needs to get rid of the negative image it gained during the early ages, during which there ...
When is a language considered a scripting language? [closed]
...ave anything to do with it. By the above definition, if an app exposes an API to Python, it is said to use Python as its scripting language. If you build an app entirely in Python, that app uses it as a programming language.
– bug
Jun 23 '13 at 3:05
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Compiled vs. Interpreted Languages
...ommon mistake is to attribute the usefulness of a language to its existing APIs.
– Little Endian
Jan 23 '16 at 23:27
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Protecting executable from reverse engineering?
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Safe Net Sentinel (formerly Aladdin). Caveats though - their API sucks, documentation sucks, and both of those are great in comparison to their SDK tools.
I've used their hardware protection method (Sentinel HASP HL) for many years. It requires a proprietary USB key fob which acts as...