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What is Node.js' Connect, Express and “middleware”?
Despite knowing JavaScript quite well, I'm confused what exactly these three projects in Node.js ecosystem do. Is it something like Rails' Rack? Can someone please explain?
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Design Pattern for Undo Engine
I'm writing a structural modeling tool for a civil enginering application. I have one huge model class representing the entire building, which include collections of nodes, line elements, loads, etc. which are also custom classes.
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Why is the default value of the string type null instead of an empty string?
It's quite annoying to test all my strings for null before I can safely apply methods like ToUpper() , StartWith() etc...
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Shuffle two list at once with same order
I'm using the nltk library's movie_reviews corpus which contains a large number of documents. My task is get predictive performance of these reviews with pre-processing of the data and without pre-processing. But there is problem, in lists documents and documents2 I have the same documents ...
Is volatile expensive?
After reading The JSR-133 Cookbook for Compiler Writers about the implementation of volatile, especially section "Interactions with Atomic Instructions" I assume that reading a volatile variable without updating it needs a LoadLoad or a LoadStore barrier. Further down the page I see that LoadLoad ...
What is the difference between a HashMap and a TreeMap? [duplicate]
I started learning Java. When would I use a HashMap over a TreeMap?
8 Answers
8
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How can I exclude $(this) from a jQuery selector?
I have something like this:
4 Answers
4
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C++形参与实参的区别（实例解析） - C/C++ - 清泛网 - 专注C/C++及内核技术
...=*x;
*x=*y;
*y=tmp;
printf("Exchg3:x=%d,y=%d\n",*x,*y);
}
void main()
{
int a=4,b=6;
Exchg1 (a,b) ;
printf("a=%d,b=%d\n",a,b);
Exchg2 (a,b);
printf("a=%d,b=%d\n",a,b);
Exchg3(&a,&b) ;
printf("a=%d,b=%d\n",a,b);
}
这里Exchg1函数被调用的时候，并没有成功交...
How can I restart a Java application?
How can I restart a Java AWT application? I have a button to which I have attached an event handler. What code should I use to restart the application?
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AWS Difference between a snapshot and AMI
So I am having trouble working out what, specifically is the difference between these two.
10 Answers
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