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Python - Create a list with initial capacity
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def doAppend( size=10000 ):
result = []
for i in range(size):
message= "some unique object %d" % ( i, )
result.append(message)
return result
def doAllocate( size=10000 ):
result=size*[None]
for i in range(size):
message= "some unique object...
Context switches much slower in new linux kernels
We are looking to upgrade the OS on our servers from Ubuntu 10.04 LTS to Ubuntu 12.04 LTS. Unfortunately, it seems that the latency to run a thread that has become runnable has significantly increased from the 2.6 kernel to the 3.2 kernel. In fact the latency numbers we are getting are hard to belie...
How to display an unordered list in two columns?
With the following HTML, what is the easiest method to display the list as two columns?
15 Answers
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Java Reflection: How to get the name of a variable?
Using Java Reflection, is it possible to get the name of a local variable? For example, if I have this:
8 Answers
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How to sort git tags by version string order of form rc-X.Y.Z.W?
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Use version sort
git tag -l | sort -V
or for git version >= 2.0
git tag -l --sort=v:refname
git tag -l --sort=-v:refname # reverse
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Quickly create a large file on a Linux system
How can I quickly create a large file on a Linux ( Red Hat Linux ) system?
14 Answers
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Change date format in a Java string
I've a String representing a date.
19 Answers
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Difference between map, applymap and apply methods in Pandas
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Straight from Wes McKinney's Python for Data Analysis book, pg. 132 (I highly recommended this book):
Another frequent operation is applying a function on 1D arrays to each column or row. DataFrame’s apply method does exactl...
How to get datetime in JavaScript?
How to get date time in JavaScript with format 31/12/2010 03:55 AM?
7 Answers
7
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How to replace a character by a newline in Vim
I'm trying to replace each , in the current file by a new line:
11 Answers
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