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How do I retrieve the number of columns in a Pandas data frame?
... could explain why df.shape is better? my guess is that it does not call a function but just reads the attribute from memory?
– mkln
Nov 30 '13 at 18:59
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iOS / Android cross platform development [closed]
... choices.
These frameworks take different approaches, and many of them are fundamentally designed to solve different problems. Some are focused on games, some are focused on apps. I would ask the following questions:
What do you want to write? Enterprise application, personal productivity applicatio...
Displaying the build date
...spect this change makes this approach unquestionably bad. And while it's a fun exercise I would recommend people to simply embed a build date into their binary through any other means necessary if it's important to track the build date of the binary itself.
This can be done with some trivial code g...
How to check if an object is a list or tuple (but not string)?
... tuple - but not a str . Because many times I stumbled upon bugs where a function passes a str object by mistake, and the target function does for x in lst assuming that lst is actually a list or tuple .
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Building a minimal plugin architecture in Python
...iscovered requirement at a time. But that's not to say you can't have some fun doing it anyway :)
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Parse large JSON file in Nodejs
...lePath, {flags: 'r', encoding: 'utf-8'});
var buf = '';
stream.on('data', function(d) {
buf += d.toString(); // when data is read, stash it in a string buffer
pump(); // then process the buffer
});
function pump() {
var pos;
while ((pos = buf.indexOf('\n')) >= 0) { // keep goin...
How do I design a class in Python?
...no mutable data. What you have is derived data, created by transformation functions from the source dataset.
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Returning first x items from array
...ou can tell which item comes before or after other items. But just for the fun of it, you can re-combine the keys with the values of the array (although there is still no defined order): array_combine(array_slice(array_keys($array), 0, 5), array_slice($array, 0, 5))
– knittl
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When is a function too long? [closed]
...ines? When you should start to break it apart? I'm asking because I have a function with 60 lines (including comments) and was thinking about breaking it apart.
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Code Golf: Collatz Conjecture
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Befunge
&>:.:1-|
>3*^ @
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v>2/>+
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edited Mar 5 '10 at 18:21
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