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Swift class introspection & generics
...based type using generics, however I am encountering difficulty with class introspection.
7 Answers
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&& (AND) and || (OR) in IF statements
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If we didn't have 'short-circuits' in Java, we'd receive a lot of NullPointerExceptions in the above lines of code.
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How to set cornerRadius for only top-left and top-right corner of a UIView?
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Pay attention to the fact that if you have layout constraints attached to it, you must refresh this as follows in your UIView subclass:
override func layoutSubviews() {
super.layoutSubviews()
roundCorners(corners: [.topLeft, .topRight], radius: 3.0)
}
If you don't do tha...
Django : How can I see a list of urlpatterns?
...om list_urls(lis[1:], acc)
for p in list_urls(urlconf.urlpatterns):
print(''.join(p))
This code prints all URLs, unlike some other solutions it will print the full path and not only the last node. e.g.:
admin/
admin/login/
admin/logout/
admin/password_change/
admin/password_change/done/
admi...
How to recursively list all the files in a directory in C#?
...need. Except as opposed to searching the files and comparing names, just print out the names.
It can be modified like so:
static void DirSearch(string sDir)
{
try
{
foreach (string d in Directory.GetDirectories(sDir))
{
foreach (string f in Directory.GetFiles(d)...
How do I read CSV data into a record array in NumPy?
I wonder if there is a direct way to import the contents of a CSV file into a record array, much in the way that R's read.table() , read.delim() , and read.csv() family imports data to R's data frame?
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How do I check in SQLite whether a table exists?
...veToFirst())
{
cursor.close();
return false;
}
int count = cursor.getInt(0);
cursor.close();
return count > 0;
}
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Select datatype of the field in postgres
...r example
I have the following table,
student_details (
stu_id integer,
stu_name varchar(30 ),
joined_date timestamp
);
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Meaning of = delete after function declaration
... methods (i.e. within the class and its friends). This removes any uncertainty when you're reading the code. @Prasoon, that second example is still only deleting constructors - it would be nice to see a deleted operator long () for example.
– Toby Speight
Aug...
How to document class attributes in Python? [closed]
I'm writing a lightweight class whose attributes are intended to be publicly accessible, and only sometimes overridden in specific instantiations. There's no provision in the Python language for creating docstrings for class attributes, or any sort of attributes, for that matter. What is the expec...