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Can Flask have optional URL parameters?
... Any problems using this method when referencing endpoints and url_for ?
– user427165
Jun 20 '13 at 18:05
2
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为什么编译好的libcurl静态lib用不了？ - C/C++ - 清泛网 - 专注C/C++及内核技术
...ust
add -DCURL_STATICLIB to your CFLAGS. Otherwise the linker will look for
dynamic import symbols. If you get linker error like "unknown symbol
__imp__curl_easy_init ..." you have linked against the wrong (static)
library. If you want to use the libcurl.dll and import lib, you don't nee...
How do I convert a Ruby class name to a underscore-delimited symbol?
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Rails comes with a method called underscore that will allow you to transform CamelCased strings into underscore_separated strings. So you might be able to do this:
FooBar.name.underscore.to_sym
But you will have to install ActiveSupport just to do that, as ipsum says.
If you don't want to ins...
Can I query MongoDB ObjectId by date?
...Id = ObjectID.createFromTime(timestamp / 1000);
Alternatively, to search for records before the current time, you can simply do:
var objectId = new ObjectID(); // or ObjectId in the mongo shell
Source: http://mongodb.github.io/node-mongodb-native/api-bson-generated/objectid.html
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How to compute the similarity between two text documents?
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The common way of doing this is to transform the documents into TF-IDF vectors and then compute the cosine similarity between them. Any textbook on information retrieval (IR) covers this. See esp. Introduction to Information Retrieval, which is free and available o...
What is a good Hash Function?
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For doing "normal" hash table lookups on basically any kind of data - this one by Paul Hsieh is the best I've ever used.
http://www.azillionmonkeys.com/qed/hash.html
If you care about cryptographically secure or anything el...
How do I associate a Vagrant project directory with an existing VirtualBox VM?
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WARNING: The solution below works for Vagrant 1.0.x but not Vagrant 1.1+.
Vagrant uses the ".vagrant" file in the same directory as your "Vagrantfile" to track the UUID of your VM. This file will not exist if a VM does not exist. The format of the file is JS...
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
...熟悉lambda表达式，请参考boost的lambda库相关资料
std::for_each( stu.stu_couselist.begin(), stu.stu_couselist.end(), std::cout << boost::lambda::_1 );
return os;
}
bool operator<( const Course& lhs, const Course& rhs )
{
return lhs.course_num < rhs....
Switching between GCC and Clang/LLVM using CMake
...make -DCMAKE_USER_MAKE_RULES_OVERRIDE=~/ClangOverrides.txt ..
Finally to force the use of the LLVM binutils, set the internal variable _CMAKE_TOOLCHAIN_PREFIX. This variable is honored by the CMakeFindBinUtils module:
$ cmake -D_CMAKE_TOOLCHAIN_PREFIX=llvm- ..
Putting this all together you can ...
Sorting dictionary keys in python [duplicate]
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[v[0] for v in sorted(foo.items(), key=lambda(k,v): (v,k))]
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