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Im pretty new to Android but I have worked with Java before.
I dont understand why my algorithm doesn't work. The result I get is 0.0%.
txtInfo.setText(Double.toString((RadioProgress/255)*100)+"%");
txtInfo is a TextView.
I can see in my graphic that my RadioProgress gets the right value. But still I get 0.0% all the time.
Please help me understand :)
Thanks in advance!
If RadioProgress is of integer type and less than 255 then division will always return 0. Cast it to double and you will see values.
Another way would be to divide by 255.0 to enforce conversion
txtInfo.setText(Double.toString((RadioProgress/255.0)*100)+"%");
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I have recently decompiled a Java program I had written quite a while ago, and I noticed where I had Math.pi it replaced it with 3.1415... etc, I also have gotten this weird number and I cannot figure out what it is, if it was a number I put in myself or the result of something the compiler did like with Pi. What is this number?
The number is 0.7853981633974483
Edit:
Thank you, those who helped me I am sorry, I was not able to figure out this simple thing, I now know what it is and I will consider that in the future, I now know that when you decompile Java, it puts 3.1415... in place of the math.pi, and if it is math.pi * 2 it would do that math and put 6.283.. in place of it. I did not know that before.
0.785398... is pi / 4. Without knowing more about the code we can't know if that makes sense to you or not...
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It would be fine for me if the code below returned true.
Since it has not, what are the best uses for this feature? What am I missing?
a := 10.52i
b := 10i
fmt.Println(a == b)
//false
Based on #Tashi, #Arkku and #axiac's comments, I realized that I am missing Math knowledge to understand this feature.
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I found this game and I'm very curious for know about of algorithm implemented in it.
I don't know how look for this, I don't know what is this algorithm and I want study it.
This is the game http://www.rustylake.com/puzzle-and-skill-games/coloruid.html
Really Thank you.
This seems like a basic "Flood Fill" algorithm.
It's performed on custom 'pixels', but the principle seems the same.
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There are two textfields, i need that would introduced number in first textfield divided by introduced number in second textfield and showed result in separate label. Help please!
If I understand your question correctly, the following should work:
label3.text = String(Float(label1.text) / Float(label2.text))
You take the text in label1, convert it to a float, do the same for label2, do the conversion and then convert it back to a string. Then take that string and set it as the text of label3.
(Note: The reason I chose to cast to Float and not to Int is because you will lose any remainder from the division. If there is no chance of a remainder, or if it is not important, then I would suggest using Int)
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How can we solve question which could not be solved by master method
Is there any method or we should leave it
Master theorem is just a shorthand for another, more cumbersome method: approximating manually the result (i.e. thinking of the size of the recursion trees and how much time is spent in each node) and checking the result.
There is also more general Akra-Bazzi method.
Of course, it has strengths, but should not be considered a “magic bullet” too.