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How exactly does a generator comprehension work?
...t recent call last):
File "<stdin>", line 1, in <module>
TypeError: object of type 'generator' has no len()
>>> # We extract each item out individually. We'll do it manually first.
...
>>> next(filtered_gen)
5
>>> next(filtered_gen)
9
>>> next(filte...
Build vs new in Rails 3
... some_firm.clients, and calling save on some_firm resulted in a validation error indicating that client was invalid. If both new and build add the new client to some_firm's client collection, what does build do that new doesn't do? I'm sorry for being dense, here!
– ClosureCowb...
Static Vs. Dynamic Binding in Java
...
Wouldn't this throw a compilation error such as "Cannot reference a non-static class/method from a static context"? I'm always confused with that, having in mind that main is static. Thanks in advance.
– Amnor
Dec 14 '16...
How are parameters sent in an HTTP POST request?
...guages will probably handle this for you. The exception to this is the 415 error. No framework can predict which content-types your application chooses to support and/or not support. This is up to you.
PUT (relevant RFC section)
A PUT request is pretty much handled in the exact same way as a POST ...
What are the benefits of using C# vs F# or F# vs C#? [closed]
...concise in a functional programming language like F# and your code is less error-prone (immutability, more powerful type system, intuitive recurive algorithms). You can code what you mean instead of what the computer wants you to say ;-) You will find many discussions like this when you google it or...
Java Generics (Wildcards)
...
List<? extends Number> nums = ints;
nums.add(3.14); // compile-time error
assert ints.toString().equals("[1, 2, 3.14]");
To put elements into the structure we need another kind of wildcard called Wildcards with super,
List<Object> objs = Arrays.<Object>asList(2, 3.14, "four"...
First-time database design: am I overengineering? [closed]
...ces than simply Private Sector / Public Sector).
Also, I think there's an error in your usage of the Departments table. It looks like the Departments table serves as a reference to the various kinds of departments that each customer division can have. If so, it should be called DepartmentTypes. ...
How to run only one task in ansible playbook?
...
This doesn't work - ERROR! A playbook must be a list of plays, got a <class 'ansible.parsing.yaml.objects.AnsibleMapping'> instead
– Alexander Skwar
Oct 24 '19 at 9:10
...
What's the purpose of git-mv?
... So git mv allows you to be explicit with your intention and to avoid some errors.
Consider this example. Starting with an empty repo,
git init
echo "First" >a
echo "Second" >b
git add *
git commit -m "initial commit"
mv a c
mv b a
git status
Result:
# On branch master
# Changes not stage...
What is reflection and why is it useful?
... @FernandoGabrieli while it is true that it is easy to create runtime errors with reflection, it is also perfectly possible to use reflection without risking runtime exceptions. As hinted in my answer, a common use of reflection is for libraries or frameworks, which explicitly can't know the st...