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Which, if any, C++ compilers do tail-recursion optimization?
...);
int foo(int n, int acc) {
return (n == 0) ? acc : bar(n - 1, acc + 2);
}
int bar(int n, int acc) {
return (n == 0) ? acc : foo(n - 1, acc + 1);
}
Letting the compiler do the optimisation is straightforward: Just switch on optimisation for speed:
For MSVC, use /O2 or /Ox.
For GCC, Cl...
Run a single migration file
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244
You can just run the code directly out of the ruby file:
rails console
>> require "db/m...
Git Push Error: insufficient permission for adding an object to repository database
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Repair Pe...
Ignore modified (but not committed) files in git?
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277
check out the git-update-index man page and the --assume-unchanged bit and related.
when I ha...
How do I ignore files in Subversion?
...is answer has been updated to match SVN 1.8 and 1.9's behaviour)
You have 2 questions:
Marking files as ignored:
By "ignored file" I mean the file won't appear in lists even as "unversioned": your SVN client will pretend the file doesn't exist at all in the filesystem.
Ignored files are specifie...
No route matches “/users/sign_out” devise rails 3
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29 Answers
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In SQL, what's the difference between count(column) and count(*)?
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236
count(*) counts NULLs and count(column) does not
[edit] added this code so that people can ru...
Spring Data: “delete by” is supported?
... Andrey AtapinAndrey Atapin
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Source unreachable when using the NuGet Package Manager Console
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edited May 6 '15 at 14:26
Kyle Dev-ious
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answered Oct 14 '14 at 11:17
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Why switch is faster than if
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DanielDaniel
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