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not None test in Python [duplicate]
...
From, Programming Recommendations, PEP 8:
Comparisons to singletons like None should always be done with is or is not, never the equality operators.
Also, beware of writing if x when you really mean if x is not None — e.g....
Why is TypedReference behind the scenes? It's so fast and safe… almost magical!
...r instance, a hypothetical managed C implementation could probably benefit from.
– Mehrdad Afshari
Jan 24 '11 at 0:51
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Passing data to a bootstrap modal
... the modal is open meaning the value of the input name bookId is the value from which it was clicked right?
– treblaluch
Feb 4 '16 at 3:28
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Print array to a file
...xport or set print_r to return the output instead of printing it.
Example from PHP manual
$b = array (
'm' => 'monkey',
'foo' => 'bar',
'x' => array ('x', 'y', 'z'));
$results = print_r($b, true); // $results now contains output from print_r
You can then save $results wit...
How to check if running as root in a bash script
...ruser another name.
I think the best way when using bash is to use $EUID, from the man page:
EUID Expands to the effective user ID of the current user, initialized
at shell startup. This variable is readonly.
This is a better way than $UID which could be changed and not reflect the r...
How do I pause my shell script for a second before continuing?
...ython) you need to import the time module
import time
time.sleep(1)
or
from time import sleep
sleep(1)
For shell script is is just
sleep 1
Which executes the sleep command. eg. /bin/sleep
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D Programming Language in the real world? [closed]
... matters. It's a nice fit for research work because often you're starting from scratch anyway, so you don't have much legacy code to worry about integrating with.
Another popular area for use seems to be web services. Hopefully someone else can comment who's in this space, but there too I think t...
ImportError: No module named apiclient.discovery
...he apiclient alias was just maintained as to not break legacy code.
# bad
from apiclient.discovery import build
# good
from googleapiclient.discovery import build
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Getting SyntaxError for print with keyword argument end=' '
...2.4), you can use the __future__ module to enable it in your script file:
from __future__ import print_function
The same goes with unicode_literals and some other nice things (with_statement, for example). This won't work in really old versions (i.e. created before the feature was introduced) of ...
How to use Single TextWatcher for multiple EditTexts?
...mentation, just switch on the view to see which one the Editable is coming from
Declaration:
private class GenericTextWatcher implements TextWatcher{
private View view;
private GenericTextWatcher(View view) {
this.view = view;
}
public void beforeTextChanged(CharSequence ...