zero

The part I keep getting stuck on is boolean(0 % 2 !=0) == false. I mean if 2 goes into 0, 0 times then the remainder would be 2, and 2 does not equal 0. So it should be true. Yet but when I put the boolean in my java program it is treating it as false. Anyone know why? The only logical answer I can wrap my head around is that maybe integers go into 0 and infinite number of times and so are recognized as false, anyone? There are two steps: 0 % 2 evaluates to 0 . 0 != 0 evaluates to false . To elaborate on the first step, the JLS defines the % operator like so: The binary % operator is said to

I cannot understand the behavior of gcc 4.8.1 or Visual Studio 2015 with respect to default initialization versus value initialization. It doesn't help that I'm trying to understand the differences between these myself and possibly running into compiler bugs? My question is: Can someone explain this behavior? And ideally tell me what should be happening. I have two classes: class Foo{ int _bar; public: void printBar(){ cout << _bar << endl; } }; class bar{ int ent; public: int getEnt(){return ent;} }; I'm using the following code to test: int main() { Foo foo; foo.printBar(); Foo().printBar();

I'd like to change float like this way: 10.5000 -> 10.5 10.0000 -> 10 How can I delete all zeros after the decimal point, and change it either float (if there's non-zeros) or int (if there were only zeros)? Thanks in advance. Why not try regexp? new Float(10.25000f).toString().replaceAll("\\.?0*$", "") Well the trick is that floats and doubles themselves don't really have trailing zeros per se; it's just the way they are printed (or initialized as literals) that might show them. Consider these examples: Float.toString(10.5000); // => "10.5" Float.toString(10.0000); // => "10.0" You can use a

I have an oracle column(artnr) contains a length of 1 which is of type number(9). I want to update the number as following... Example : If number is 0 then it should be 00000 If number is 1 then it should be 00001 If number is 12 the it should be 00012 Remember : here 00000,0000, and 00012 are of number datatypes The following are the methods I have tried but failed.. UPDATE pitb.toestel b SET b.artnr = LPAD (b.artnr, 5, 0) WHERE b.idinventaris = 403743; Failed because Lpad can only be applied on strings UPDATE pitb.toestel b SET b.artnr = TO_NUMBER (TO_CHAR (artnr, '00009'), '00009') WHERE b

Is it possible to parse signed zero? I tried several approaches but no one gives the proper result: float test1 = Convert.ToSingle("-0.0"); float test2 = float.Parse("-0.0"); float test3; float.TryParse("-0.0", out test3); If I use the value directly initialized it is just fine: float test4 = -0.0f; So the problem seems to be in the parsing procedures of c#. I hope somebody could tell if there is some option or workaround for that. The difference could only be seen by converting to binary: var bin= BitConverter.GetBytes(test4); I think there is no way to force float.Parse (or Convert.ToSingle

I have a vector like: a = [1,2,3,4,5,6...,n] and I would like to obtain a new vector like this: a_new = [1,0,0,2,0,0,3,0,0,4,0,0,5,0,0,6,...,0,0,n] where a fixed number of zeros (2 in the above example) are inserted between the non-zero elements. If I choose zero_p=3 , the new vector would be: a_new = [1,0,0,0,2,0,0,0,3,0,0,0,4,0,0,0,5,0,0,0,6,...,0,0,0,n] etc. How can I do this? Try this: zero_p=3; a_new=zeros(1, (zero_p+1)*length(a)-zero_p); a_new(1:(zero_p+1):end)=a; (Untested, but should hopefully work.) There's a few ways I can think of: Kronecker product The kronecker product is

I have a simple Label that should include the bound .Count value of a Property of an ObservableCollection . The thing is, that the result is always 0 (zero). The same Property is bound to a DataGrid, which works perfectly and even updates if something has changed in the Collection. What am I doing wrong here? Here is my code: <Label ContentStringFormat="Members: {0}"> <Label.Content> <Binding Path="MembersList.Count" Mode="OneWay" UpdateSourceTrigger="Default" /> </Label.Content> </Label> The Property looks like: public static ObservableCollection<Mitglied> MembersList { get; set; } Vishal You

The MSDN documentation mentions that double type includes negative zero. However, both -1.0 / double.PositiveInfinity and -double.Epsilon / 2 appear to return normal 0 (and compare equal to it). How can I get -0? Here is a practical example of differentiating between the two without examining the bits. MSDN links here and here assisted me in constructing this example. static void Main(string[] args) { float a = 5 / float.NegativeInfinity; float b = 5 / float.PositiveInfinity; float c = 1 / a; float d = 1 / b; Console.WriteLine(a); Console.WriteLine(b); Console.WriteLine(c); Console.WriteLine(d