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How to delete duplicate lines in a file without sorting it in Unix?
...n3\n3\n4\n4\n4\n4\n5' |sed -nr '$!N;/^(.*)\n\1$/!P;D'
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the core idea is:
print ONLY once of each duplicate consecutive lines at its LAST appearance and use D command to implement LOOP.
Explains:
$!N;: if current line is NOT the last line, use N command to read the next line into patt...
Split value from one field to two
...e a valid use. But I reiterate, doing it in the query is not really a good idea.
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Is it possible for intellij to organize imports the same way as in Eclipse?
...on a project where all the team members are using Eclipse and I'm the only IDEA user. This creates a lot of noise from imports rearrangements. The order in which eclipse imports is: Java, Javax, Org, Com, everything else in alphabetical order. Is it possible to configure IDEA to follow these rules?
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Detect rotation of Android phone in the browser with JavaScript
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That's a good idea, I'll try that (and ask my friend with the Android phone to test!)
– philnash
Oct 30 '09 at 18:01
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How do I access the request object or any other variable in a form's clean() method?
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The answer by Ber - storing it in threadlocals - is a very bad idea. There's absolutely no reason to do it this way.
A much better way is to override the form's __init__ method to take an extra keyword argument, request. This stores the request in the form, where it's required, and from...
List of lists changes reflected across sublists unexpectedly
...nt list [[1] * 4] evaluates to, not the [[1] * 4 expression text. * has no idea how to make copies of that element, no idea how to reevaluate [[1] * 4], and no idea you even want copies, and in general, there might not even be a way to copy the element.
The only option * has is to make new referenc...
Hidden features of Scala
...gher-kinded types)
Without this feature you can, for example, express the idea of mapping a function over a list to return another list, or mapping a function over a tree to return another tree. But you can't express this idea generally without higher kinds.
With higher kinds, you can capture the ...
How to clear/remove observable bindings in Knockout.js?
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Isn't the idea of KO that you should very rarely be touching the dom yourself? This answer loops through the dom , and would certainly be far from unusable in my use case.
– Blowsie
May 14 '13 at ...
How to generate a random int in C?
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+1 for simplicity, but it is probably a good idea to emphasize that srand() should only be called once. Also, in a threaded application, you might want to make sure that the generator's state is stored per thread, and seed the generator once for each thread.
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Check if a string is html or not
...) {
if (c[i].nodeType == 1) return true;
}
return false;
}
The idea is to allow browser DOM parser to decide if provided string looks like an HTML or not. As you can see it simply checks for ELEMENT_NODE (nodeType of 1).
I made a couple of tests and looks like it works:
isHTML('<a&g...