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Command to get nth line of STDOUT
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Using sed, just for variety:
ls -l | sed -n 2p
Using this alternative, which looks more efficient since it stops reading the input when the required line is printed, may generate a SIGPIPE in the feeding process, which may in turn generate an unwanted error message:
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Using module 'subprocess' with timeout
Here's the Python code to run an arbitrary command returning its stdout data, or raise an exception on non-zero exit codes:
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What are “named tuples” in Python?
Reading the changes in Python 3.1 , I found something... unexpected:
11 Answers
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Immutability of Strings in Java
Consider the following example.
26 Answers
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Removing elements by class name?
...e so:
$('.column').remove();
Otherwise, you're going to need to use the parent of each element to remove it:
element.parentNode.removeChild(element);
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Linux: copy and create destination dir if it does not exist
I want a command (or probably an option to cp) that creates the destination directory if it does not exist.
21 Answers
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What is a segmentation fault?
...lt? Is it different in C and C++? How are segmentation faults and dangling pointers related?
14 Answers
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How To Change DataType of a DataColumn in a DataTable?
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You cannot change the DataType after the Datatable is filled with data. However, you can clone the Data table, change the column type and load data from previous data table to the cloned table as shown below.
DataTable dtCloned = dt.Clone();
dtCloned.C...
“On-line” (iterator) algorithms for estimating statistical median, mode, skewness, kurtosis?
...wness and Kurtosis (along the lines of the variance), see in the same wiki page here the parallel algorithms for higher-moment statistics.
Median
Median is tough without sorted data. If you know, how many data points you have, in theory you only have to partially sort, e.g. by using a selection al...
Can I get a patch-compatible output from git-diff?
...eUploader: {
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