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Pandas percentage of total with groupby
... the sales column by its sum. Copying the beginning of Paul H's answer:
# From Paul H
import numpy as np
import pandas as pd
np.random.seed(0)
df = pd.DataFrame({'state': ['CA', 'WA', 'CO', 'AZ'] * 3,
'office_id': list(range(1, 7)) * 2,
'sales': [np.random.rand...
How to add /usr/local/bin in $PATH on Mac
...e OS X way. Paths on OS X are built using /usr/libexec/path_helper, called from the default /etc/profile. Start at man path_helper then add your paths in files in /etc/paths.d. You will find that pretty much every path setting example from other OSs includes $PATH because none of them seem to be abl...
Strip spaces/tabs/newlines - python
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Use str.split([sep[, maxsplit]]) with no sep or sep=None:
From docs:
If sep is not specified or is None, a different splitting algorithm is
applied: runs of consecutive whitespace are regarded as a single
separator, and the result will contain no empty strings at the start
...
Error: Can't set headers after they are sent to the client
...At least with the current npm install connect, which looks quite different from the one github as of this post). When the server gets a request, it iterates over the stack, calling the (request, response, next) method.
The problem is, if in one of the middleware items writes to the response body o...
Understanding the ngRepeat 'track by' expression
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I have a list of 700 odd items. Render time went from 4 seconds to 100ms. Track by should be used for all ngRepeat's based on data sourced from rest.
– Patrick
Nov 3 '16 at 1:04
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Are memory leaks ever ok? [closed]
... a memory leak and it can impair your program. Future allocations can fail from this proces because I am sure you are checking that malloc returned non nil everywhere. by over using memory, such as in an embedded situation where memor is scarce this could be the difference between life and death.
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How to convert a private key to an RSA private key?
Let me explain my question first. I bought a certificate from a CA and used the following format to generate the csr and the private key:
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How do I remove code duplication between similar const and non-const member functions?
...using const_cast instead of static_cast to add const since it prevents you from changing the type accidentally.
– Greg Rogers
Nov 23 '08 at 7:49
7
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What is mod_php?
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This answer is taken from TuxRadar:
When running PHP through your web server, there are two distinct options: running it using PHP's CGI SAPI, or running it as a module for the web server. Each have their own benefits, but, overall, the module i...
NSUserDefaults removeObjectForKey vs. setObject:nil
...l.
here is how to test if setting key value to nil removed the key entry from NSUserDefaults standardUserDefaults.
NSArray *keys = [[[NSUserDefaults standardUserDefaults] dictionaryRepresentation] allKeys] copy];
for(NSString *key in keys) {
NSLog(@"Key Name: %@", key);
}
[keys release]...