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How to check for the type of a template parameter?

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Ruby on Rails: How can I revert a migration with rake db:migrate?

... @morhook This works for rails 3 also. Check the docs here guides.rubyonrails.org/v3.2/migrations.html – Mahesh Feb 11 '19 at 17:05 ...
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Mock HttpContext.Current in Test Init Method

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How to put a label on an issue in GitHub if you are not a contributor / owner?

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Finding a substring within a list in Python [duplicate]

... print [s for s in list if sub in s] If you want them separated by newlines: print "\n".join(s for s in list if sub in s) Full example, with case insensitivity: mylist = ['abc123', 'def456', 'ghi789', 'ABC987', 'aBc654'] sub = 'abc' print "\n".join(s for s in mylist if sub.lower() in...
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BigDecimal - to use new or valueOf

...le it should be treated the same way that the primitive wrappers (Integer, Byte, ...) and String are treated: object identity should not matter to your code, only the value should matter. – Joachim Sauer Aug 25 '11 at 8:21 ...
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keytool error Keystore was tampered with, or password was incorrect

... I solved it by using the default password for cacerts keystore : 'changeit' share | improve this answer | follo...
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How to create an array of object literals in a loop?

... It seems to me though that you should really be creating an object keyed by labels with sub-objects as values: var columns = {}; for (var i = 0; i < oFullResponse.results.length; i++) { var key = oFullResponse.results[i].label; columns[key] = { sortable: true, resizeabl...
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C++ static virtual members?

... Exactly. A "virtual function" is (by definition) a function which is dynamically linked, i.e. it's chosen at runtime depending on the dynamic type of a given object. Hence, no object = no virtual call. – Kos Nov 16 '11 a...
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“x not in y” or “not x in y”

... think of not x in xs is not (x in xs). But the fact that it's implemented by parsing it into precisely the same bytecode as x not in xs very clearly shows that they must be always identical, as opposed to things like not x == y vs x != y which should give the same result, but don't have to (dependi...