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In Python, when should I use a function instead of a method?
... is this - is the operation performed on the object or by the object?
if it is done by the object, it should be a member operation. If it could apply to other things too, or is done by something else to the object then it should be a function (or perhaps a member of something else).
When introduc...
Why do you use typedef when declaring an enum in C++?
I haven't written any C++ in years and now I'm trying to get back into it. I then ran across this and thought about giving up:
...
What's the difference between identifying and non-identifying relationships?
...d table depends on a row in a parent table. This may be confusing because it's common practice these days to create a pseudokey for a child table, but not make the foreign key to the parent part of the child's primary key. Formally, the "right" way to do this is to make the foreign key part of the...
Can I set variables to undefined or pass undefined as an argument?
I’m a bit confused about JavaScript’s undefined and null values.
10 Answers
10...
Call An Asynchronous Javascript Function Synchronously
First, this is a very specific case of doing it the wrong way on-purpose to retrofit an asynchronous call into a very synchronous codebase that is many thousands of lines long and time doesn't currently afford the ability to make the changes to "do it right." It hurts every fiber of my being, but re...
How do I fix PyDev “Undefined variable from import” errors?
...a settings object. I import that in module b and assign an attribute with:
13 Answers
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UIButton: how to center an image and a text using imageEdgeInsets and titleEdgeInsets?
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For what it's worth, here's a general solution to positioning the image centered above the text without using any magic numbers. Note that the following code is outdated and you should probably use one of the updated versions below:
/...
In Git, how can I write the current commit hash to a file in the same commit
I'm trying to do a fancy stuff here with Git hooks, but I don't really know how to do it (or if it's possible).
7 Answers
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FileSystemWatcher vs polling to watch for file changes
...e system watcher fail in production and test environments. I now consider it a convenience, but I do not consider it reliable. My pattern has been to watch for changes with the files system watcher, but poll occasionally to catch missing file changes.
Edit: If you have a UI, you can also give y...
Is if(items != null) superfluous before foreach(T item in items)?
...
You still need to check if (items != null) otherwise you will get NullReferenceException. However you can do something like this:
List<string> items = null;
foreach (var item in items ?? new List<string>())
{
item.Dump();
}
but you...