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unable to start mongodb local server
...Cumulo Nimbus
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answered Jan 31 '13 at 12:03
morphymorphy
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Linear Layout and weight in Android
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answered Apr 23 '10 at 17:08
JeremyFromEarthJeremyFromEarth
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How can I make pandas dataframe column headers all lowercase?
...
180
You can do it like this:
data.columns = map(str.lower, data.columns)
or
data.columns = [x.lo...
What is the most efficient/elegant way to parse a flat table into a tree?
...
Now that MySQL 8.0 supports recursive queries, we can say that all popular SQL databases support recursive queries in standard syntax.
WITH RECURSIVE MyTree AS (
SELECT * FROM MyTable WHERE ParentId IS NULL
UNION ALL
SELECT m.* F...
What is the difference between shallow copy, deepcopy and normal assignment operation?
...rint id(c) == id(d) # True - d is the same object as c
print id(c[0]) == id(d[0]) # True - d[0] is the same object as c[0]
Using a shallow copy:
d = copy.copy(c)
print id(c) == id(d) # False - d is now a new object
print id(c[0]) == id(d[0]) # True - d[0] is the same obje...
Fast Linux File Count for a large number of files
...in a particular directory when there are a very large number of files ( > 100,000).
18 Answers
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Redirect STDERR / STDOUT of a process AFTER it's been started, using command line?
... to the process in question using gdb, and run:
p dup2(open("/dev/null", 0), 1)
p dup2(open("/dev/null", 0), 2)
detach
quit
e.g.:
$ tail -f /var/log/lastlog &
[1] 5636
$ ls -l /proc/5636/fd
total 0
lrwx------ 1 myuser myuser 64 Feb 27 07:36 0 -> /dev/pts/0
lrwx------ 1 myuser myuser 6...
How do I convert a float number to a whole number in JavaScript?
... 5 5
~~value // 5 5 5
value | 0 // 5 5 5
value >> 0 // 5 5 5
value >>> 0 // 5 5 5
value - value % 1 // 5 5 5
Negative
// val...
How to generate keyboard events in Python?
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+50
It can be done using ctypes:
import ctypes
from ctypes import wintypes
import time
user32 = ctypes.WinDLL('user32', use_last_error=T...
Join a list of strings in python and wrap each string in quotation marks
...ords = ['hello', 'world', 'you', 'look', 'nice']
>>> ', '.join('"{0}"'.format(w) for w in words)
'"hello", "world", "you", "look", "nice"'
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