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Circular list iterator in Python
...n l:
print i
all of which print:
>>>
a
b
c
d
a
b
c
d
...etc.
of the three I'd be prone to the append(pop()) approach as a function
servers = ['a','b','c','d']
def rotate_servers(servers):
servers.append(servers.pop(0))
return servers
while 1:
servers = rotate_serv...
Section vs Article HTML5
I have a page made up of various "sections" like videos, a newsfeed etc.. I am a bit confused how to represent these with HTML5. Currently I have them as HTML5 <section> s, but on further inspection it looks they the more correct tag would be <article> . Could anyone shed some light on...
How do API Keys and Secret Keys work? Would it be secure if I have to pass my API and secret keys to
..., if the result is greater than ten, subtracts ten. So f(2) = 5, f(8) = 1, etc. Now, we can make another function, call it f', that goes backwards, by adding seven instead of three. f'(5) = 2, f'(1) = 8, etc.
That's an example of a two-way function and its inverse. Theoretically, any mathematical f...
How do I scale a stubborn SVG embedded with the tag?
... You can also do preserveAspectRatio="none" if you want to stretch the svg out in arbitrary ways.
– Matt Crinklaw-Vogt
Oct 7 '13 at 19:18
5
...
Replacement for deprecated sizeWithFont: in iOS 7?
... a UILabel (not ALWAYS the case, but often so), to prevent duplicated code/etc, you can also replace [UIFont systemFontOfSize:17.0f] with label.font - helps code maintenance by referencing existing data vs. you typing it multiple times or referencing constants all over the place, etc
...
How do I prompt for Yes/No/Cancel input in a Linux shell script?
...secret:" 20 60 "First..." 2>&1 >/dev/tty)
$DIALOG --textbox /etc/motd 20 60
AnsCkLst=$($DIALOG --checklist "Check some..." 20 60 12 \
Correct "This demo is useful" off \
Fun "This demo is nice" off \
Strong "This demo is complex" ...
What are the differences among grep, awk & sed? [duplicate]
...e second column of file.txt
Basic awk usage:
Compute sum/average/max/min/etc. what ever you may need.
$ cat file.txt
A 10
B 20
C 60
$ awk 'BEGIN {sum=0; count=0; OFS="\t"} {sum+=$2; count++} END {print "Average:", sum/count}' file.txt
Average: 30
I recommend that you read this book: Sed &...
How to “log in” to a website using Python's Requests module?
...ormally, it simply adds persistence, allowing you to store and use cookies etc.
Assuming your login attempt was successful, you can simply use the session instance to make further requests to the site. The cookie that identifies you will be used to authorise the requests.
Example
import requests
...
Facebook Architecture [closed]
...ey use. How do they scale & what are the design decisions for what they do etc. Main underpinning being to learn. Knowing about sites which handles such massive traffic gives lots of pointers for architects etc. to keep in mind certain stuff while designing new sites. I am sharing what I found.
...
How to create a directory using Ansible
...g but a file.
# create a directory if it doesn't exist
- file:
path: /etc/some_directory
state: directory
mode: 0755
owner: foo
group: foo
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