TupleVectorSpaces This Julia package allows you to take a tuple of objects and treat it as a "vector", in the sense of an abstract vector space (not a 1d array), as long as the components are vectors — that is, as long as they support addition, subtraction, and multiplication by sca...
while循环从in中读取名为s的书籍,然后调用上面的findBook函数来查找是否有名为s的书籍 如果没有,则findBook返回的vector为空,那么使用continue继续循环 如果查找到了,使用for循环遍历trans的vector,其中每个元素都是一个tuple 然后使用get得到tuple中的0、1、2三种元素并打印 其中使用了accumulate算法(由于我们定义了Sal...
that the vector space property is held and the linear combination is in the vector space. Member Author stevengj commented Feb 11, 2025 There's already a zero function. ndims seems a bit weird because it's not indexable … why is that required? But I can certainly add it. Would it ...
So column vectors with real parts such as the one you wrote form their own vector space, while 3-tuples do not; they are just ordered lists of numbers. As you said, since these two objects behave differently and can't mix, they do not rigorously live in the same space. The reason ...
std::vector<std::pair<int, std::string>> v{ {3,"hello"}, {1,"world"}, {2,"bye"} }; std::sort(v.begin(), v.end(), compare);for(auto& i : v) std::cout << i.first <<" "<< i.second << std::endl;return0; ...
usingnamespacestd; template<classT1,classT2> ostream&operator<<(ostream &out,constpair<T1, T2> &_) { returnout <<"("<< _.first <<", "<< _.second <<")"; } voiddisplay_separator(){ cout <<"---"<< endl; } intmain() { string...
这里tuple的第二个元素，vector在构造时，除了使用传入的参数v，还用到了自定义的allocator，my_alloc。
void reportResults(istream &in, ostream &os, const vector<vector<Sales_data>> &files) { std::string s; //要查找的书籍 while (in >> s) { auto trans = findBook(files, s); if (trans.empty()) { std::cout << s << "not found in any stores" << std::endl; ...
这回的两个库没怎么用过,这里的记录就用VC++写了,使用G++和BOOST的时候和智能指针类似。 首先是Tuple库 要注意的是这里G++,VC++和BOOST库的函数不太一样,所以使用的时候要注意没有使用到编译器和编译器相关的函数(特别是IDE的弹窗的方法要注意)。 比如VC++和G++里的tuple对象没有get方法,而boost里有,所以获取...
Namespace: System Assembly: mscorlib (in mscorlib.dll) Syntax C# Copy public class Tuple<T1, T2> : IStructuralEquatable, IStructuralComparable, IComparable Type Parameters T1 The type of the tuple's first component. T2 The type of the tuple's second component. The Tuple<T1, T2> type ...