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Clean way to launch the web browser from shell script?
... can put
http-server -o
in your bash script and it will launch a server from the current directory and open a browser to that page.
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Inserting image into IPython notebook markdown
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I am using ipython 2.0, so just two line.
from IPython.display import Image
Image(filename='output1.png')
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Reference list item by index within Django template?
... find an answer. What's the best way to reference a single item in a list from a Django template?
4 Answers
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git ahead/behind info between master and branch?
...- provided the user does git fetch before; useful to prevent pull requests from outdated branches.
– jakub.g
Mar 2 '16 at 19:53
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Getting attributes of a class
... if _[0] in '__dict__'][0] and then it's just a matter of getting the keys from z.
– double0darbo
Nov 11 '19 at 21:19
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How do I Search/Find and Replace in a standard string?
...ith all the calls to "replace" : complexity would be n² if you remove "o" from "ooooooo...o". I guess one can do better, but this solution has the merit of being easy to understand.
– Zonko
Sep 21 '11 at 8:57
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Check whether a string is not null and not empty
... && fails, thus ensuring you will not get a null pointer exception from str.isEmpty() if str is null.
Beware, it's only available since Java SE 1.6. You have to check str.length() == 0 on previous versions.
To ignore whitespace as well:
if(str != null && !str.trim().isEmpty())
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How to check Django version
...der Linux and want to check the Python version you're using, run python -V from the command line.
If you want to check the Django version, open a Python console and type
>>> import django
>>> django.VERSION
(2, 0, 0, 'final', 0)
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MySQL maximum memory usage
...heck out the percona server because among including a lot of contributions from companies like Facebook and Google (they know fast), it also includes Percona's own drop-in replacement for InnoDB, called XtraDB.
See my gist for percona-server (and -client) setup (on Ubuntu): http://gist.github.com/6...
Javascript reduce on array of objects
...educe((a, b) => ({x: a.x + b.x}));
// -> {x: 7}
Explanation added from comments:
The return value of each iteration of [].reduce used as the a variable in the next iteration.
Iteration 1: a = {x:1}, b = {x:2}, {x: 3} assigned to a in Iteration 2
Iteration 2: a = {x:3}, b = {x:4}.
The ...