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Why use apparently meaningless do-while and if-else statements in macros?
...ave a more complicated body of code that needs to go in its own block, say for example to declare local variables. In the most general case the solution is to use something like do ... while to cause the macro to be a single statement that takes a semicolon without confusion.
#define BAR(X) do { \...
Simplest way to detect a mobile device in PHP
...ng. Tested in IOS 8.1 using Chrome's mobile browser. Justin's is working for me though.
– James
Aug 27 '15 at 17:04
18
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Resize image in PHP
...o write some PHP code which automatically resizes any image uploaded via a form to 147x147px, but I have no idea how to go about it (I'm a relative PHP novice).
...
How to implement an STL-style iterator and avoid common pitfalls?
I made a collection for which I want to provide an STL-style, random-access iterator. I was searching around for an example implementation of an iterator but I didn't find any. I know about the need for const overloads of [] and * operators. What are the requirements for an iterator to be "STL-s...
How do you know when to use fold-left and when to use fold-right?
...eaning trees and fold-right produces right-leaning trees, but when I reach for a fold, I sometimes find myself getting bogged down in headache-inducing thought trying to determine which kind of fold is appropriate. I usually end up unwinding the entire problem and stepping through the implementatio...
Getting a map() to return a list in Python 3.x
...ecause you can still iterate over the map object like so:
# Prints "ABCD"
for ch in map(chr,[65,66,67,68]):
print(ch)
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Calling closure assigned to object property directly
...');
or use Closure::call(), though that doesn't work on a StdClass.
Before PHP7, you'd have to implement the magic __call method to intercept the call and invoke the callback (which is not possible for StdClass of course, because you cannot add the __call method)
class Foo
{
public functio...
How are feature_importances in RandomForestClassifier determined?
... out, which attributes/dates contribute to the result to what extent. Therefore I am just using the feature_importances_ , which works well for me.
...
How can I handle time zones in my webapp?
I'm looking for better understanding of the following user story:
7 Answers
7
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Disable migrations when running unit tests in Django 1.7
...models just
like syncdb did in 1.6. I defined a new settings module just for unit
tests called "settings_test.py", which imports * from the main
settings module and adds this line:
MIGRATION_MODULES = {"myapp": "myapp.migrations_not_used_in_tests"}
Then I run tests like this:
DJ...