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The sed command p prints. For example, print lines 3 through 7 of a file: sed -n '3,7p' somefile

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Show how many times each line in a sorted file is repeated: uniq -c

#linux #bash tips

if you have to refer to the documentation of a module, find a new module.

list files order by size.

ls --sort=size -hl

#bash tips

Limit find's depth of search with the -maxdepth option.

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python -x foo.py will ignore the first line of foo.py. Useful for running scripts on Windows that were written on Unix.

#python tips

Count the number of matches of a regex in each file: grep -c

#bash tips

Reverse a 1-D array

import numpy as np a = np.arange(10) print a[::-1]

#python tips

#python libraries

Python: How to get UTC time given TIMEZONE

from datetime import datetime

a=datetime.utcnow()+timedelta(hours=-4)

print time.strftime("%m%d%y%H%M",a.timetuple())

Another package to note is

pytz - World Timezone Definitions for Python¶

#python tips

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Backbone.js gives structure to web applications by providing models

Backbone.js gives structure to web applications by providing models with key-value binding and custom events, collections with a rich API of enumerable functions,views with declarative event handling, and connects it all to your existing API over a RESTful JSON interface

More: http://backbonejs.org/

#javscript #backbone

jTouch- Javascript gesture for Touch Screen

#Javascript #jTouch

A linux command line cheat sheet

#bash tips

Suppress file name when searching over multiple files: grep -h

#bash tips #grep

convert integer to and from string with radix:

int("60", 7)

#python tips

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python rational construction:

from fractions import Fraction x = Fraction(22, 7)

#python tips

Change the third 'apple' in each record to 'orange': sed 's/apple/orange/3' somefile

#bash tips #sed

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