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for (Pair p : pairs) {
double f = foo(p)
...
}
foo() performs a simple mathematical calculation as follows:
double foo(Pair p) {
return Math.cos(p.x) + Math.sin(p.y);
}
If all the items in pairs are the same, can the Java compiler optimise this using Common subexpression elimination? Or is there another optimisation that occurs? I am asking since I have found a significant time reduction when more values in pairs are the same.
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public String auxToPostfixString(Node root) {
String result = "";
if (root == null) {
return "";
}
result += auxToPostfixString(root.getLeft());
result += auxToPostfixString(root.getRight());
result += root.getExp();
return result;
}
I used this code for that, and it should return 342*+8+ but it returns 34+2*8+ (the original expr is 3+4*2+8) What's wrong about this?
Sorry for bad English
it should return 342*+8+ but it returns 34+2*8+ (the original expr is 3+4*2+8)
the problem may come from the original parsed tree : was the priority of multiplication against addition well applied ? Make sure that the tree is not, in fact, equivalent to ((3+4)*2+8).
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I am trying to code an algorithm to implement Gamma Correction but I am unable todo so with below code, because of a high power base. Wondering if anyone could fix below code to raise color values between 0,1 Thanks
The problem is in your math.
int / int will cause a truncation.
If red = 9 and you execute 9 / 255 the result is 0.
Try making all your literal values floating point
(for example 255.0 instead of 255).
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I have list values in stream while iterating I need to check if that value is negative or not if negative return zero or else retrun same value
Below is my code
{
Inventory .stream().
map.(inventory.value).sum;
}
You can just use Math.min for this. You'll have to map over them as integers, presumably:
Inventory.stream()
.mapToInt(it -> Math.min(0, it.value))
.sum()
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This Code works fine in java 7.
Iteration in java 8 is successful but I am stacked while if else decision making.
I have one list in which i have integer as well as double value. How can i parse this and set to in model class?
AverageRatingModel avgRatingModel = new AverageRatingModel();
for(Property p:propertylist){
if(p.getName().equals("averagevote")){
avgRatingModel.setAvgRating(Double.parseDouble(p.getValue()));
}
if(p.getName().equals("nbvotes")){
avgRatingModel.setNoOfVotes(Integer.parseInt(p.getValue()));
}
}
You can use two streams but it would be horrible. It would must better to have a data structure which is designed for Properties.
properties.ifPresentDouble("averagevote", avgRatingModel::setAvgRating);
properties.ifPresentInt("nbvotes", avgRatingModel::setNoOfVotes);
You code will be much cleaner if you have useful data structure for your properteis.
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For example, I have my main method as well as the method returnOdds(original), that returns the integer array "odd"
How would I print the elements of this array in the main method? With a for loop?
A for loop would work. If you don't care about the format, though, a simpler solution might be to use Arrays.toString, which will convert in the form "[elem1, elem2, ..., elemn]".
"With a for loop?"
answer : "yes"