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...erl -ne 'print if ($seen{$_} .= @ARGV) =~ /10$/' file1 file2
(perl code from http://www.cyberciti.biz/faq/command-to-display-lines-common-in-files/ , which took it from "someone at comp.unix.shell news group").
See process substitution if you want to make it a one-liner.
...
Difference between InvariantCulture and Ordinal string comparison
... the first difference. This sorts capitalized letters completely separate from the lowercase letters (and accented letters presumably separate from those), so capitalized words would sort nowhere near their lowercase equivalents.
InvariantCulture also considers capitals to be greater than lower ca...
Accessing bash command line args $@ vs $*
...
A nice handy overview table from the Bash Hackers Wiki:
where c in the third row is the first character of $IFS, the Internal Field Separator, a shell variable.
If the arguments are to be stored in a script variable and the arguments are expected to...
How to get Scala List from Java List?
I have a Java API that returns a List like:
6 Answers
6
...
Assignment inside lambda expression in Python
...gned the lambda to fn for clarity (and because it got a little long-ish).
from operator import add
from itertools import ifilter, ifilterfalse
fn = lambda l, pred: add(list(ifilter(pred, iter(l))), [ifilterfalse(pred, iter(l)).next()])
objs = [Object(name=""), Object(name="fake_name"), Object(name=...
How to specify the private SSH-key to use when executing shell command on Git?
...t to specify a private SSH-key to use when executing a shell (git) command from the local computer.
29 Answers
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What character to use to put an item at the end of an alphabetic list?
...ers because they can really mess up the things when you access your folder from terminal or programming languages. I had annoying issues using 末 or other special characters.
For example, using Python 2.7, this is how you will see your folders with the non-printable characters Ω, 末, 口,.
os...
Best way to represent a fraction in Java?
...inator = denominator.divide(gcd);
}
/**
* Constructs a BigFraction from a whole number.
*/
public BigFraction(BigInteger numerator)
{
this(numerator, BigInteger.ONE, true);
}
public BigFraction(long numerator, long denominator)
{
this(BigInteger.valueOf(numerator), BigI...
Is double square brackets [[ ]] preferable over single square brackets [ ] in Bash?
... a weird name.
] is just an argument of [ that prevents further arguments from being used.
Ubuntu 16.04 actually has an executable for it at /usr/bin/[ provided by coreutils, but the bash built-in version takes precedence.
Nothing is altered in the way that Bash parses the command.
In particular...
What is the difference between .text, .value, and .value2?
...alue or .Text is usually a bad idea because you may not get the real value from the cell, and they are slower than .Value2
For a more extensive discussion see my Text vs Value vs Value2
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