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sed: print only matching group
... replaced with the contents of the group
echo "foo bar <foo> bla 1 2 3.4" |
sed -n 's/.*\([0-9][0-9]*[\ \t][0-9.]*[ \t]*$\)/\1/p'
2 3.4
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Remove all special characters, punctuation and spaces from string
...without regex:
>>> string = "Special $#! characters spaces 888323"
>>> ''.join(e for e in string if e.isalnum())
'Specialcharactersspaces888323'
You can use str.isalnum:
S.isalnum() -> bool
Return True if all characters in S are alphanumeric
and there is at least one cha...
Shading a kernel density plot between two points.
...x,y) pairs.
Edit: Here you go:
x1 <- min(which(dens$x >= q75))
x2 <- max(which(dens$x < q95))
with(dens, polygon(x=c(x[c(x1,x1:x2,x2)]), y= c(0, y[x1:x2], 0), col="gray"))
Output (added by JDL)
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How can I test https connections with Django as easily as I can non-https connections using 'runserv
...nication. For this we turn to openssl.
Create the key:
openssl genrsa 1024 > stunnel.key
Create the certificate that uses this key (this will ask you a bunch of information that will be included in the certficate - just answer with whatever feels good to you):
openssl req -new -x509 -nodes ...
What does (function($) {})(jQuery); mean?
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Firstly, a code block that looks like (function(){})() is merely a function that is executed i...
Pad a number with leading zeros in JavaScript [duplicate]
...e.
Example usage:
pad(10, 4); // 0010
pad(9, 4); // 0009
pad(123, 4); // 0123
pad(10, 4, '-'); // --10
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In an array of objects, fastest way to find the index of an object whose attributes match a search
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answered Apr 19 '13 at 8:28
Pablo Francisco Pérez HidalgoPablo Francisco Pérez Hidalgo
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How to get the current time as datetime
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27 Answers
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On EC2: sudo node command not found, but node without sudo is ok
I have just installed nodejs on a new EC2 micro instance.
12 Answers
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Converting a date string to a DateTime object using Joda Time library
I have a date as a string in the following format "04/02/2011 20:27:05" . I am using Joda-Time library and would like to convert it to DateTime object. I did:
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