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Random row selection in Pandas dataframe
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With pandas version 0.16.1 and up, there is now a DataFrame.sample method built-in:
import pandas
df = pandas.DataFrame(pandas.np.random.random(100))
# Randomly sample 70% of your dataframe
df_percent = df.sample(frac=0.7)
# Randomly sample 7 elements from your dat...
How do I unload (reload) a Python module?
....4, in favour of importlib (thanks @Stefan!).
I think, therefore, you’d now use importlib.reload(module), although I’m not sure.
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What's the best way to iterate over two or more containers simultaneously
...t simple enough to live in isolation without using a library (and it is!). Now I would probably write it as a wrapper around Boost.Range. That said, the performance of my library is already optimal. What I mean by this is that using my indices implementation yields compiler output which is identical...
How to use Global Variables in C#?
...on't belong to any class).
This being said, the simplest approach that I know to mimic this feature consists in using a static class, as follows:
public static class Globals
{
public const Int32 BUFFER_SIZE = 512; // Unmodifiable
public static String FILE_NAME = "Output.txt"; // Modifiable...
C++ Dynamic Shared Library on Linux
...ass* instead? I'm not asking you to change this for me, I'd just like to know if there's a reason to use one over the other.
– Bill the Lizard
Jan 30 '09 at 21:05
1
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What is the strict aliasing rule?
...wn convenience. Anyway undefined behavior might still ensue. Even when we know some of what's happening under the hood, it's still a violation of the rule so no well defined behavior is guaranteed. So just by wrapping in a function that takes our word delimited buffer doesn't necessarily help.
So ho...
NSRange to Range
...???
Therefore the text replacement in the text field delegate method
can now be done as
func textField(_ textField: UITextField,
shouldChangeCharactersIn range: NSRange,
replacementString string: String) -> Bool {
if let oldString = textField.text {
l...
Are PHP functions case sensitive?
... . '.php';
if (file_exists($filename)) {
require($filename);
}
}
Now with this code:
$a = new something(); // works
$b = new SomeThing(); // does not work
$c = new SOMETHING(); // does not work
You may made this work (ie. having effectively case insensitive class names using an autoload...
config.assets.compile=true in Rails production, why not?
...Also, someone would have to pay the price of slow asset delivery for an unknown period of time until all the assets are compiled and in place.
The default, where the price of compiling everything is paid off-line at one time, does not impact public visitors and ensures that everything works before ...
How to set top-left alignment for UILabel for iOS application?
...r, I was excited to have a purely UI solution, then that code comes out of nowhere and we're not told where to put it
– velkoon
Oct 6 '18 at 0:07
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