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How to resize an image to fit in the browser window?
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14 Answers
14
Active
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How does HashSet compare elements for equality?
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138
It uses an IEqualityComparer<T> (EqualityComparer<T>.Default unless you specify a ...
How to print matched regex pattern using awk?
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148
This is the very basic
awk '/pattern/{ print $0 }' file
ask awk to search for pattern using...
How to get last items of a list in Python?
...at. Here's an example using the python CLI interpreter:
>>> a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
>>> a
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
>>> a[-9:]
[4, 5, 6, 7, 8, 9, 10, 11, 12]
the important line is a[-9:]
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Generating an MD5 checksum of a file
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491
You can use hashlib.md5()
Note that sometimes you won't be able to fit the whole file in memory...
How to open a web server port on EC2 instance
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137
Follow the steps that are described on this answer just instead of using the drop down, type t...
count number of lines in terminal output
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491
Pipe the result to wc using the -l (line count) switch:
grep -Rl "curl" ./ | wc -l
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Regular expression for a string containing one word but not another
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146
This should do it:
^(?!.*details\.cfm).*selector=size.*$
^.*selector=size.*$ should be clea...
Iterating over each line of ls -l output
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Set IFS to newline, like this:
IFS='
'
for x in `ls -l $1`; do echo $x; done
Put a sub-shell around it if you don't want to set IFS permanently:
(IFS='
'
for x in `ls -l $1`; do echo $x; done)
Or use while | read instead:
ls -l $1 | while read x; do echo $x; done
One more ...