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Why does parseInt yield NaN with Array#map?
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483
The callback function in Array.map has three parameters:
From the same Mozilla page that you li...
Uniq by object attribute in Ruby
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LaneLane
3,35411 gold badge2323 silver badges1313 bronze badges
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Pandas conditional creation of a series/dataframe column
...s
Set Type color
0 Z A green
1 Z B green
2 X B red
3 Y C red
If you have more than two conditions then use np.select. For example, if you want color to be
yellow when (df['Set'] == 'Z') & (df['Type'] == 'A')
otherwise blue when (df['Set'] == 'Z') & (df[...
How to convert timestamps to dates in Bash?
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answered Mar 3 '10 at 12:47
a'ra'r
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Searching for UUIDs in text with regex
...IDs), there are five equivalent string representations for a GUID:
"ca761232ed4211cebacd00aa0057b223"
"CA761232-ED42-11CE-BACD-00AA0057B223"
"{CA761232-ED42-11CE-BACD-00AA0057B223}"
"(CA761232-ED42-11CE-BACD-00AA0057B223)"
"{0xCA761232, 0xED42, 0x11CE, {0xBA, 0xCD, 0x00, 0xAA, 0x00, 0x57, 0...
Python “extend” for a dictionary
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phoenix
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answered Feb 23 '09 at 11:01
Nick FortescueNic...
Ignore python multiple return value
... of the tuple you wish to ignore. For instance:
def f():
return 1, 2, 3
_, _, x = f()
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List of installed gems?
... >> Platform 0.4.0
# >> abstract 1.0.0
# >> actionmailer 3.0.5
# >> actionpack 3.0.5
# >> activemodel 3.0.5
# >> activerecord 3.0.5
Here's an updated way to get a list:
require 'rubygems'
def local_gems
Gem::Specification.sort_by{ |g| [g.name.downcase, g....
Split list into smaller lists (split in half)
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238
A = [1,2,3,4,5,6]
B = A[:len(A)//2]
C = A[len(A)//2:]
If you want a function:
def split_list...
How do you round a floating point number in Perl?
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