NiL.C | ANSI C to IL Compiler. Not completed
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kandi X-RAY | NiL.C Summary
ANSI C to IL Compiler. Not completed
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QUESTION
When you i try to call .decode() to decode a struct, it returns nil.Can anyone help me?
My app is returning null value from the JSON data, from this line of code:
...ANSWER
Answered 2020-Sep-01 at 11:46You need to add the enum CodingKeys
if the keys' name differ from the property names of the Codable
type.
So, your models should be like,
QUESTION
I implemented a Red Black Tree, and I wanted to compare the time to a regular binary search tree. However, in my tests, I found that most of the time, Binary Search Tree's are actually faster. Is there something wrong in my implementation, or is this supposed to happen? This is my Red Black Tree:
...ANSWER
Answered 2020-Mar-31 at 19:49This is not a good benchmark. See How do I write a correct micro-benchmark in Java?
To list a few pain points: System.currentTimeMillis
doesn't give enough time resolution, your code doesn't do "warm up" iterations to ensure the code is compiled, it does nothing to ensure the compiler doesn't throw the code away because it doesn't have side effects, etc. If you're interested in making better benchmarks, I'd suggest learning to use JMH.
That said, the fact that you are inserting random numbers means you are very likely to avoid the pathological cases that make unbalanced binary search trees perform badly. You are in effect using a "treap" (randomized binary search tree). The overhead is lower than in a red-black tree, so it's not too surprising you may see better performance.
QUESTION
#include
using namespace std;
enum Color { black, red };
struct node {
public:
int key;
Color color;
node *left, *right, *parent;
};
class RBT {
public:
node nil;
node *root = new node;
RBT() {
nil.color = black;
root = &nil;
}
void left_rotate(node *x) {
node *y = x->right;
if (y->left == &nil) {}
}
};
int main()
{
RBT t;
cout << "t color is: " << t.root->color;
}
...ANSWER
Answered 2018-Nov-28 at 06:45enum class Color { black, red };
struct node {
static node nil; // so nil can be used in the constructor of node
int key;
Color color;
node *parent;
node *left;
node *right;
// Use this constructor for new nodes. Parameters you don't provide
// have defaults.
node(int key = 0, Color color = Color::black,
node *parent = &nil, node *left = &nil, node *right = &nil)
: key{ key }, color{ color }, parent{ parent }, left{ left }, right{ right }
{}
};
node node::nil;
struct RBT {
node root; // please, no new without purpose
void left_rotate(node *x) {
node *y = x->right;
if (y->left == &node::nil) {
// whatever
}
}
};
QUESTION
I'm trying to implement red-black tree data structure and came across this example from Apple Open Source project. This is the code for creating a tree:
...ANSWER
Answered 2017-Jul-19 at 14:33Let's say you want to check one of the main properties of the RB tree, that there are no adjacent red nodes.
With NULL representation, it looks like this:
node->color == black || (node->left == NULL || node->left->color == black) && (node->right == NULL || node->right->color == black)
Sentinel representation allows to express it more concisely:
node->color == black || node->left->color == black && node->right->color == black
Same simplification applies to the actual checks in the tree operations.
Similar story with the fake root. It ensures that the tree is never empty, and thus eliminates a special case from the tree insertion routine. (No idea what they meant by spitting though.)
QUESTION
I'm working on a programming online judge project like HackerRank,Codeforces etc...
I have thread pool and when requests comes, the web services gets a thread from thread pool and that thread compiles the code with ProcessBuilder(everything is okey until here), after the compilation, that thread starts execution part by using again a new Processbuilder. But my "time limit exceed" part is not calculated properly. When number of requests is increased, then I think that the process works slowly and for this reason any basic code gets time out. How can I measure the execution time of the code which is executed by a process ?(the measurement should not been affected by number of requests)
EDIT: my process should waitfor user time of the process.But I dont know how to do this.
My execution code is here:
...ANSWER
Answered 2017-May-29 at 23:52Have you tryed to:
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