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How to toggle a value in Python
...
Perfect! p doesn't need to be referenced twice for this method to work!! Idea if you are toggling a value with a long long reference.
– ThorSummoner
Dec 12 '14 at 7:16
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Failed to execute 'btoa' on 'Window': The string to be encoded contains characters outside of the La
...OPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="
// public method for encoding
, encode: function (input)
{
var output = "";
var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
var i = 0;
input = Base64._utf8_encode(input);
while (i < input.len...
Why doesn't list have safe “get” method like dictionary?
...hat a valid list index is, but there's no particularly good way to do this for key values in a dictionary.
– Nick Bastin
Feb 26 '11 at 7:35
10
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How to check if the string is empty?
...u should use myString == "". See the documentation on Truth Value Testing for other values that are false in Boolean contexts.
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Show the progress of a Python multiprocessing pool imap_unordered call?
...attributes of the result set:
from __future__ import division
import sys
for i, _ in enumerate(p.imap_unordered(do_work, xrange(num_tasks)), 1):
sys.stderr.write('\rdone {0:%}'.format(i/num_tasks))
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How to list all installed packages and their versions in Python?
...u can simply call this:
pip freeze
It will also include version numbers for the installed packages.
Update
pip has been updated to also produce the same output as pip freeze by calling:
pip list
Note
The output from pip list is formatted differently, so if you have some shell script that pa...
Is 'switch' faster than 'if'?
...gh, as it only works when the input can be bounded some way.
C Pseudocode for a "jump table" would be something like this -- note that the compiler in practice would need to insert some form of if test around the table to ensure that the input was valid in the table. Note also that it only works in...
How can I change Mac OS's default Java VM returned from /usr/libexec/java_home
...ine
visualvm_jdkhome="`/usr/libexec/java_home -v '1.7*'`"
and this will force it to choose Java 7 instead of 8.
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How to plot two columns of a pandas data frame using points?
...like to plot values from one column versus the values from another column. Fortunately, there is plot method associated with the data-frames that seems to do what I need:
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How to split a string literal across multiple lines in C / Objective-C?
... Line2";
Better approach
There's a better approach that works just for strings.
Plain C:
char *my_string = "Line 1 "
"Line 2";
Objective-C:
NSString *my_string = @"Line1 "
"Line2"; // the second @ is optional
The second approach is better, b...