theory

In my principles of programming class we are talking about different calling methods. Some we discussed were: call by value call by reference call by value/result and call by name I can't find an example of how call by name works. Anyone care to give me an example? I think that when you take an xml file as input this is similar to call by name. Could someone give me a more traditional example? I'll work in a hypothetical programming language. Let's assume we have a function p(x) that prints out x and then returns it. Now let's define a function: function foo(x, y) { return y+1; } Now let's

The halting problem cannot be solved for Turing complete languages and it can be solved trivially for some non-TC languages like regexes where it always halts. I was wondering if there are any languages that has both the ability to halt and not halt but admits an algorithm that can determine whether it halts. A. Rex Yes. One important class of this kind are primitive recursive functions . This class includes all of the basic things you expect to be able to do with numbers (addition, multiplication, etc.), as well as some complex classes like @adrian has mentioned (regular expressions/finite

@DataPoints public static final Integer[] input1={1,2}; @Theory @Test public void test1(int input1){ } @DataPoints public static final Integer[] input2={3,4}; @Theory @Test public void test2(int input2 ){ } I want that test1 runs with data set input1 - {1,2} and test2 runs with input2 - {3,4}. But currently each test runs with both the data sets {1,2,3,4}. How to bind specific @DataPoints to specific @Theorys DataPoints apply to the class. If you have a @Theory method which takes an int, and you have a DataPoint which is an array of ints, then it will be called with the int. @RunWith(Theories

生物信息学 Cell theory:7 个要点 All known living things are made up of one or more cells. All living cells arise from pre-existing cells by division. The cell is the fundamental unit of structure and function in all living organisms. The activity of an organism depends on the total activity of independent cells. Energy flow (metabolism and biochemistry) occurs within cells. Cells contain DNA which is found specifically in the chromosome and RNA found in the cell nucleus and cytoplasm. All cells are basically the same in chemical composition in organisms of similar species. Genotype-Transcription-gene

So say I have an image that I want to "pixelate". I want this sharp image represented by a grid of, say, 100 x 100 squares. So if the original photo is 500 px X 500 px, each square is 5 px X 5 px. So each square would have a color corresponding to the 5 px X 5 px group of pixels it swaps in for... How do I figure out what this one color, which is best representative of the stuff it covers, is? Do I just take the R G and B numbers for each of the 25 pixels and average them? Or is there some obscure other way I should know about? What is conventionally used in "pixelation" functions, say like in

I am trying to calculate the centre of mass (x,y,z) coordinates of an object defined in an STL file (stereo lithography, not to be confused with the standard template library). The STL file contains a closed object (or objects) defined by a boundary made of triangles. The triangles themselves are not necessarily in any order, the file is simply the coordinates 3 vertices of each triangle floating in 3D space plus a normal vector to the triangle (the normal should be disregarded as it is not always done properly). There is nothing that links each triangle to one another, it is assumed that the