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What is the difference between join and merge in Pandas?
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I always use join on indices:
import pandas as pd
left = pd.DataFrame({'key': ['foo', 'bar'], 'val': [1, 2]}).set_index('key')
right = pd.DataFrame({'key': ['foo', 'bar'], 'val': [4, 5]}).set_index('key')
left.join(right, lsuffix='_l', rsuffix='_r')
va...
delete word after or around cursor in VIM
...^+W in INSERT mode very useful. However, I'd like to delete not only the word before cursor, but the word after or around cursor as well.
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Incrementing in C++ - When to use x++ or ++x?
...n a while ago.
I know that you can use "++x" to make the incrementation before and "x++" to do it after.
10 Answers
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如何选择机器学习算法 - 大数据 & AI - 清泛网移动版 - 专注C/C++及内核技术
...的。jmp0xf 译自Edwin Chen
How do you know what machine learning algorithm to choose for your classification problem? Of course, if you really care about accuracy, your best bet is to test out a couple different ones (making sure to try different parameters within each algorithm as well), and ...
Differences between TCP sockets and web sockets, one more time [duplicate]
...es between TCP socket and websocket, I've already found a lot of useful information within these questions:
2 Answers
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What do 'real', 'user' and 'sys' mean in the output of time(1)?
... time slices used by other processes and time the process spends blocked (for example if it is waiting for I/O to complete).
User is the amount of CPU time spent in user-mode code (outside the kernel) within the process. This is only actual CPU time used in executing the process. Other processes a...
How to remove all white space from the beginning or end of a string?
... String ".TrimEnd() -> " A String"
None of the methods modify the original string object.
(In some implementations at least, if there are no white-spaces to be trimmed, you get back the same string object you started with:
csharp> string a = "a";
csharp> string trimmed = a.Trim();
c...
PhoneGap: Detect if running on desktop browser
I'm developing a web application that uses PhoneGap:Build for a mobile version and want to have a single codebase for the 'desktop' and mobile versions. I want to be able to detect if PhoneGap calls will work (ie, is the user on a mobile device that will support PhoneGap).
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Difference between staticmethod and classmethod
What is the difference between a function decorated with @staticmethod and one decorated with @classmethod ?
27 Answers
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How to flush output of print function?
How do I force Python's print function to output to the screen?
13 Answers
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