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How to get the index of an element in an IEnumerable?
...
The whole point of getting things out as IEnumerable is so you can lazily iterate over the contents. As such, there isn't really a concept of an index. What you are doing really doesn't make a lot of sense for an IEnumerable. If you need...
Is there a Python equivalent of the C# null-coalescing operator?
... so it works in a boolean context. If the values are not boolean, they are converted to boolean for the purposes of the operator.
Note that the or operator does not return only True or False. Instead, it returns the first operand if the first operand evaluates to true, and it returns the second ope...
Simple example of threading in C++
...void task1(string msg)
{
cout << "task1 says: " << msg;
}
int main()
{
// Constructs the new thread and runs it. Does not block execution.
thread t1(task1, "Hello");
// Do other things...
// Makes the main thread wait for the new thread to finish execution, therefo...
How do I create an empty array/matrix in NumPy?
...might be best off to keep it in a list until it is finished, and only then convert it into an array.
e.g.
mylist = []
for item in data:
mylist.append(item)
mat = numpy.array(mylist)
item can be a list, an array or any iterable, as long
as each item has the same number of elements.
In this ...
Fastest way to serialize and deserialize .NET objects
...inary.
[XmlType]
public class CT {
[XmlElement(Order = 1)]
public int Foo { get; set; }
}
[XmlType]
public class TE {
[XmlElement(Order = 1)]
public int Bar { get; set; }
}
[XmlType]
public class TD {
[XmlElement(Order=1)]
public List<CT> CTs { get; set; }
[XmlElem...
Fast ceiling of an integer division in C / C++
Given integer values x and y , C and C++ both return as the quotient q = x/y the floor of the floating point equivalent. I'm interested in a method of returning the ceiling instead. For example, ceil(10/5)=2 and ceil(11/5)=3 .
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The key must be an application-specific resource id
...two tags corresponding to say a first and last name. where do i define the integer IDs for these?
– Jeffrey Blattman
May 26 '11 at 1:04
7
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How to call a parent class function from derived class function?
...led child which is derived from parent. Within
each class there is a print function. In the definition of the child's print function I would like to make a call to the parents print function. How would I go about doing this?
...
Efficient way to return a std::vector in c++
... it be to place the std::vector in free-store (on the heap) and return a pointer instead i.e. is:
8 Answers
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数据挖掘——分词入门 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...民共和国
normalDict.add("中华人民共和国");
int strLen = str.length(); //传入字符串的长度
int j = 0;
String matchWord = ""; //根据词库里识别出来的词
int matchPos = 0; //根据词库里识别出来词后当前句子中的位...