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Can the Unix list command 'ls' output numerical chmod permissions?
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it almost can ..
ls -l | awk '{k=0;for(i=0;i<=8;i++)k+=((substr($1,i+2,1)~/[rwx]/) \
*2^(8-i));if(k)printf("%0o ",k);print}'
share
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improv...
Selecting with complex criteria from pandas.DataFrame
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406
Sure! Setup:
>>> import pandas as pd
>>> from random import randint
>&gt...
Creating range in JavaScript - strange syntax
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+1000
Understanding this "hack" requires understanding several things:
Why we don't just do Array(5).map(...)
How Function.prototype.app...
Immutable vs Mutable types
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What? Floats are immutable? But can't I do
x = 5.0
x += 7.0
print x # 12.0
Doesn't that "mut" x?
Well you agree strings are immutable right? But you can do the same thing.
s = 'foo'
s += 'bar'
print s # foobar
The value of the variable changes, but it changes by chang...
Python: Append item to list N times
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For immutable data types:
l = [0] * 100
# [0, 0, 0, 0, 0, ...]
l = ['foo'] * 100
# ['foo', 'foo', 'foo', 'foo', ...]
For values that are stored by reference and you may wish to modify later (like sub-lists, or dicts):
l = [{} for x in range(100)]
(Th...
Using jquery to get element's position relative to viewport
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edited Apr 17 '13 at 9:50
Pang
8,2181717 gold badges7373 silver badges111111 bronze badges
answered Oc...
Getting a map() to return a list in Python 3.x
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802
Do this:
list(map(chr,[66,53,0,94]))
In Python 3+, many processes that iterate over iterable...
Better way to check variable for null or empty string?
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10 Answers
10
Active
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Why is AJAX returning HTTP status code 0?
...application) the browser just stops uploading and returns status codes of 0 . Why does this happen?
20 Answers
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How to find Unused Amazon EC2 Security groups
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edited Jul 1 at 20:15
Dherik
11.2k1010 gold badges7373 silver badges114114 bronze badges
answer...