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How do I verify/check/test/validate my SSH passphrase?
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edited Jun 6 at 21:40
Peter Mortensen
26.5k2121 gold badges9292 silver badges122122 bronze badges
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how do you filter pandas dataframes by multiple columns
...sub-statements with ():
males = df[(df[Gender]=='Male') & (df[Year]==2014)]
To store your dataframes in a dict using a for loop:
from collections import defaultdict
dic={}
for g in ['male', 'female']:
dic[g]=defaultdict(dict)
for y in [2013, 2014]:
dic[g][y]=df[(df[Gender]==g) & ...
Modular multiplicative inverse function in Python
...meone will find this useful (from wikibooks):
def egcd(a, b):
if a == 0:
return (b, 0, 1)
else:
g, y, x = egcd(b % a, a)
return (g, x - (b // a) * y, y)
def modinv(a, m):
g, x, y = egcd(a, m)
if g != 1:
raise Exception('modular inverse does not exist...
How does Task become an int?
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kmad1729
1,05411 gold badge1010 silver badges1919 bronze badges
answered Oct 31 '12 at 13:32
Jon SkeetJon Skeet
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MySQL stored procedure vs function, which would I use when?
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105
You can't mix in stored procedures with ordinary SQL, whilst with stored function you can.
e.g...
Install MySQL on Ubuntu without a password prompt
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stefansundin
1,50711 gold badge1313 silver badges1919 bronze badges
answered Oct 12 '11 at 13:08
Dimitre RadoulovDimi...
What is & used for
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130
& is HTML for "Start of a character reference".
& is the character reference for "A...
Pass a data.frame column name to a function
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109
You can just use the column name directly:
df <- data.frame(A=1:10, B=2:11, C=3:12)
fun1 &l...
How to change the default font size in ggplot2
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Use theme_set()
theme_set(theme_gray(base_size = 18))
qplot(1:10, 1:10)
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