In computer science, a predicate is called an invariant to a sequence of operations provided that: if the predicate is true before starting the sequence, then it is true at the end of the sequence.
In loops, invariants are data structures referenced within the loop that do not change during any iteration. In design-by-contract, invariants are invariants are properties of a class than must be satisfied at the end of any method call that is invoked from outside of the class itself.
I need some help with these functions and if the run-time complexities for it are correct, I'm learning the concepts currently in class and I've looked at videos and such but I can't find any videos explaining these tougher ones, so I'm hoping I can…
I am trying to use invariants(code contracts library) in my program inside a carpark class where all my methods are implemented but "The name does not exist in the current context" appears.The highlighted words appeared to make the problem. The…
Can someone tell me what is this function doing? I just know that it returns the sum of x + y, but I want to know why. Thanks
public static int f(int x, int y){
while( y > 0){
x = x + 1;
y = y - 1;
}
return x;
}
I am trying to find the invariants from a data set (.csv file) using Daikon but I didn't find any example or help over the internet to run daikon on .CSV file containing boolean data (matrix of 3 by 8).
Image for the csv file
As instructions…
I am trying to digest a large Java Application by modeling it in UML using ArgoUML. In the properties section of the UML diagramming tool there is a helpful checklist that I am assuming is used to help design good software. Most of the checklist…
I understand from the Go tour that upper case variables are meant to be exported, while lower case variables in a struct are not exported. But I am trying to achieve something else.
In Java, I could define a class Adult, like so
class Adult
{
…
I was reading up on covariance and contravariance today and I came across a post on stack exchange where Jon Skeet was explaining invariance at the class level. He used an example of fruit and why allowing covariance at that level would be a bad…
