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How do you round a float to two decimal places in jruby
...most any way you like, and lots more.
Full sprintf documentation: http://www.ruby-doc.org/core-2.0.0/Kernel.html#method-i-sprintf
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What's the simplest way to test whether a number is a power of 2 in C++?
... so if that is possible, you will want to check for it explicitly.
http://www.graphics.stanford.edu/~seander/bithacks.html has a large collection of clever bit-twiddling algorithms, including this one.
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How to get instance variables in Python?
...tes that the class allows instances to have. Slots are explained in http://www.python.org/2.2.3/descrintro.html, but there are various pitfalls with slots; they affect memory layout, so multiple inheritance may be problematic, and inheritance in general has to take slots into account, too.
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Do sessions really violate RESTfulness?
...tication (using HTTP 401 would be incorrect as we probably wouldn't supply Www-Authenticate to a client, as HTTP specs require :) ). It should also be noted that Set-Cookie is only a recommendation for client. Its contents may be or may not be saved (for example, if cookies are disabled), while Auth...
CMake unable to determine linker language with C++
...to
PROJECT(HelloWorld C CXX)
or just
PROJECT(HelloWorld)
See: http://www.cmake.org/cmake/help/v2.8.8/cmake.html#command:project
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What are the effects of exceptions on performance in Java?
...st too long to post here. So let me summarize here and refer you to http://www.fuwjax.com/how-slow-are-java-exceptions/ for the gritty details.
The real question here is not "How slow are 'failures reported as exceptions' compared to 'code that never fails'?" as the accepted response might have you...
廉价共享存储解决方案1-drbd+ha+nfs - 更多技术 - 清泛网 - 专注C/C++及内核技术
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3.4.设置drbd.conf配置文件
详细配置说明请参考
http://www.itnose.net/detail/6272989.html
本次编译安装配置文件位置:/usr/local/drbd-utils-8.9.3/etc/
#vi /usr/local/drbd-utils-8.9.3/etc/drbd.conf
#include "drbd.d/global_common.conf";
#include "drbd.d/*.r...
How to print third column to last column?
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awk '{ print substr($0, index($0,$3)) }'
solution found here:
http://www.linuxquestions.org/questions/linux-newbie-8/awk-print-field-to-end-and-character-count-179078/
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How to define a function in ghci across multiple lines?
...tty new feature. You may need to upgrade GHC.
Edit: confirmed, see http://www.haskell.org/ghc/docs/6.8.2/html/users_guide/release-6-8-2.html
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Setting default value for TypeScript object passed as argument
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Typescript supports default parameters now:
https://www.typescriptlang.org/docs/handbook/functions.html
Also, adding a default value allows you to omit the type declaration, because it can be inferred from the default value:
function sayName(firstName: string, lastName = "Sm...