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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
...:type::iterator it = indexOfName.find("李四");
// 找到了？
if( it != indexOfName.end() )
{
// it就是一个Student序列的迭代器，现在你可以
// 像普通迭代器一样操作它了，比如cout << *it
}
看，是不是很简单呢...
Where to define custom error types in Ruby and/or Rails?
...stom error types in a Ruby library (gem) or Ruby on Rails application? Specifically:
5 Answers
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How to refer environment variable in POM.xml?
...ely describe your project so please use environment variables judiciously. If you make your builds dependent on your environment, they are harder to reproduce
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EF Migrations: Rollback last applied migration?
...
Another detail: If you have an existing Manual Migration you need to roll back to, but realized your "Down" method doesn't really roll things back properly, you can just edit and save it, then rerun update-database -target... until it rolls ...
How add context menu item to Windows Explorer for folders [closed]
...a directory in right panel:
HKEY_CLASSES_ROOT\Directory\Background\shell if you are administrator
HKEY_CURRENT_USER\Software\Classes\directory\Background\shell if you are a normal user
Context menu for right click on folders in right panel of Windows Explorer:
HKEY_CLASSES_ROOT\Directory\shell...
Why is Scala's immutable Set not covariant in its type?
...the concept behind sets as functions. The following signatures should clarify things slightly:
trait Set[A] extends (A=>Boolean) {
def apply(e: A): Boolean
}
If Set were covariant in A, the apply method would be unable to take a parameter of type A due to the contravariance of functions. S...
WPF ToolBar: how to remove grip and overflow
...opy
I recommend adding the copy to a Resource Dictionary
Click Ok
You'll now be editing the control template for the ToolBarPanel, and can set the visibility to Collapsed for the grip and overflow signal. You can rinse and repeat for the other controls. It is a bit time consuming, but isn't terrib...
Laravel: Get base url
...pearance from the example, this is relative to the Laravel's root path, so if you're installed in /something/ it'll make the right URL.
– ceejayoz
Apr 14 '14 at 12:42
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How to compute the similarity between two text documents?
... will return normalized tf-idf
pairwise_similarity = tfidf * tfidf.T
or, if the documents are plain strings,
>>> corpus = ["I'd like an apple",
... "An apple a day keeps the doctor away",
... "Never compare an apple to an orange",
... "I prefer scikit-lea...
C dynamically growing array
...
I can use pointers, but I am a bit afraid of using them.
If you need a dynamic array, you can't escape pointers. Why are you afraid though? They won't bite (as long as you're careful, that is). There's no built-in dynamic array in C, you'll just have to write one yourself. In C++, ...