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Can (domain name) subdomains have an underscore “_” in it?

...ed set. In particular, it allows one to encode the _ in hostnames (Update 2017-07: This is doubtful, see comments. The _ still cannot be used in hostnames. Indeed, it cannot even be used in internationalized labels.) The first RFC for internationalization was RFC 3490 of March 2003, "International...
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Is it faster to count down than it is to count up?

...hardware it makes virtually no difference. It made virtually no difference 20 years ago either. If you think you have to care, time it both ways, see no clear difference, and go back to writing the code clearly and correctly. – Donal Fellows May 15 '10 at 18:04...
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Haskell testing workflow

... – Andrew Thaddeus Martin Dec 9 '15 at 13:20  |  show 1 more comment ...
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Resolve Type from Class Name in a Different Assembly

...olve to a type. – Sergio Porres Nov 20 '19 at 2:12 add a comment  |  ...
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How to play with Control.Monad.Writer in haskell?

...m a for me. – kmikael May 27 '15 at 20:15 @kmikael You probably don't have the mtl library installed (which probably m...
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Is .NET Remoting really deprecated?

...ing." – John Saunders Aug 18 '09 at 20:57 add a comment  |  ...
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Why java.lang.Object is not abstract? [duplicate]

...ider following? – Jay Jan 23 '10 at 20:40 3 It doesn't make the design any cleaner, and it certai...
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Can I change the viewport meta tag in mobile safari on the fly?

... an iPad, it looks awkward. I thought I'd set the viewport to a width of 1020px to allow for a 20px margin on either side... but no luck: viewport = document.querySelector("meta[name=viewport]"); viewport.setAttribute('content', 'width=1020'); (Just for some context: I'm putting this in a somewhat...
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Perl flags -pe, -pi, -p, -w, -d, -i, -t?

...print $_). – rustyx May 9 '17 at 18:20 ...
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How do I check if a type is a subtype OR the type of an object?

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