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How to import CSV file data into a PostgreSQL table?
...\copy would do the same trick if you do not have the super user access; it complaints on my Fedora 16 when using COPY with a non-root account.
– asksw0rder
Oct 15 '12 at 17:07
81
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Is there a performance gain in using single quotes vs double quotes in ruby?
... edited May 23 '17 at 11:54
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answered Dec 3 '09 at 4:17
zeteticzetetic
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How to mount a host directory in a Docker container
...ys you can do this. The simplest way to do so is to use the dockerfile ADD command like so:
ADD . /path/inside/docker/container
However, any changes made to this directory on the host after building the dockerfile will not show up in the container. This is because when building a container, docke...
Avoid trailing zeroes in printf()
...NumericString at the end of nDecimals but, in that case, I'd probably just combine the two into one function), and you end up with:
40.00000000000000000000 -> 40
359.01335000000000263753 -> 359.013
-359.00999000000001615263 -> -359.01
359.00999999999999090505 -> 359.01
3.01357000...
Python Linked List
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Thomas Watnedal suggested a good educational resource How to Think Like a Computer Scientist, Chapter 17: Linked lists:
A linked list is either:
the empty list, represented by None, or
a node that contains a cargo object and a reference to a linked list.
class Node:
def __init__(self, carg...
How to write to an existing excel file without overwriting data (using pandas)?
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NSString property: copy or retain?
...e caused some confusion (see robnapier.net/blog/implementing-nscopying-439#comment-1312). You are absolutely correct about NSString, but I believe you've made the point a bit too general. The reason NSString should be copied is that it has a common mutable subclass (NSMutableString). For classes tha...
Commenting multiple lines in DOS batch file
...To test this batch file I need to execute some lines only and want to hide/comment out remaining.
7 Answers
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What's wrong with using == to compare floats in Java?
According to this java.sun page == is the equality comparison operator for floating point numbers in Java.
21 Answers
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Is there a rule-of-thumb for how to divide a dataset into training and validation sets?
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There are two competing concerns: with less training data, your parameter estimates have greater variance. With less testing data, your performance statistic will have greater variance. Broadly speaking you should be concerned with dividin...