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What is the >>>= operator in C?
...les and runs. What is this >>>= operator and the strange 1P1 literal? I have tested in Clang and GCC. There are no warnings and the output is "???"
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Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
...gth of 255 is chosen so often, other than being a nice round number ? Is it a holdout from some time in the past when there was a good reason (whether or not it applies today)?
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Disadvantages of Test Driven Development? [closed]
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Several downsides (and I'm not claiming there are no benefits - especially when writing the foundation of a project - it'd save a lot of time at the end):
Big time investment. For the simple case you lose about 20% of the actual implementation, but for complicated cases you lose m...
Checking if a variable is defined?
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Use the defined? keyword (documentation). It will return a String with the kind of the item, or nil if it doesn’t exist.
>> a = 1
=> 1
>> defined? a
=> "local-variable"
>> defined? b
=> nil
>> defined? nil
=> "nil"
>> ...
How do I print the type of a variable in Rust?
...f you merely wish to find out the type of a variable and are willing to do it at compile time, you can cause an error and get the compiler to pick it up.
For example, set the variable to a type which doesn't work:
let mut my_number: () = 32.90;
// let () = x; would work too
error[E0308]: mismatc...
F# changes to OCaml [closed]
F# is derived from OCaml, but what major items are missing or added? Specifically I'm curious as to whether the resources available for learning OCaml are also useful to someone who wants to learn F#.
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boost多索引容器multi_index_container实战 - C/C++ - 清泛网 - 专注C/C++及内核技术
...f the index to cout */
std::copy(i.begin(),i.end(),std::ostream_iterator<value_type>(std::cout));
}
此函数也是一个模板函数，其中Tag参数代表了我们需要使用的索引标签，在我们的例子里可以是stu_num，stu_name或stu_age，模板参数MultiIndexContai...
What framework for MVVM should I use? [closed]
I am developing an application with the MVVM model, but I have reached a point where I need to choose which framework to use.
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Can I get “&&” or “-and” to work in PowerShell?
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In CMD, '&&' means "execute command 1, and if it succeeds, execute command 2". I have used it for things like:
build && run_tests
In PowerShell, the closest thing you can do is:
(build) -and (run_tests)
It has the same logic, but the output text from the c...
Python vs Cpython
... all this fuss about Python and CPython (Jython,IronPython) , I don't get it:
9 Answers
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