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How to detect UI thread on Android?
....currentThread()) {
// On UI thread.
} else {
// Not on UI thread.
}
From API level 23 and up, there's a slightly more readable approach using new helper method isCurrentThread on the main looper:
if (Looper.getMainLooper().isCurrentThread()) {
// On UI thread.
} else {
// Not on UI threa...
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 can I filter a date of a DateTimeField in Django?
... docs.python.org/library/datetime.html#datetime-objects using datetime() from datetime module hrs,mins,secs is optional. the second is from a working project with vars replaced, you can look in the docs it's correct
– zalew
Aug 23 '09 at 4:19
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Constant pointer vs Pointer to constant [duplicate]
... the declaration like this which make it easy to read and understand (read from right to left):
int const *ptr; // ptr is a pointer to constant int
int *const ptr; // ptr is a constant pointer to int
share
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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...
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.
...
Understanding the ngRepeat 'track by' expression
...
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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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
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