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terminology - What does it mean when data is scalar? - Software ...
The term "scalar" comes from linear algebra, where it is used to differentiate a single number from a vector or matrix. The meaning in computing is similar. It distinguishes a single value like an integer or float from a data structure like an array. This distinction is very prominent in Perl, where the $ sigil (which resembles an 's') is used to denote a scalar variable and an @ sigil (which ...
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What are the "scalar fields" and "composite fields" in JAVA?
The terms 'scalar type' or 'scalar field' are usually used to contrast them with compound types/fields. A compound type is easiest to define and it is a type that contains multiple distinct elements. These elements can have the same type, in which case the compound is an array or a list, or different types, in which case the compound is typically a struct or a class. A scalar type is a type ...
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Recommended generic approach to checking scalar field presence in ...
There are several questions related to presence field tracking of scalar fields in protobuf 3, but I didn't find any with generic default approach recommendation.
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Paradigm for handling list of things or single elements
@KilianFoth: I don't think this applies here. "Composite design pattern" would require to wrap the passed parameter in an additional class hierarchy, but additional wrappers is exactly what the OP tries to avoid. Moreover, in Python one can already use a list or a scalar in exchange when calling a function, that is syntactically ok.
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data structures - How to represent a set in JSON? - Software ...
JSON supports the following data structures (Java equivalents): Scalar, Array/List, and Map. A Set is not supported out-of-the-box in JSON. I thought about several ways to represent a set in JSON...
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What is meant by a primitive data type?
It kind of depends on the language. For example, in languages like C and C++, you have a number of built-in scalar types - int, float, double, char, etc. These are "primitive" in the sense that they cannot be decomposed into simpler components. From these basic types you can define new types - pointer types, array types, struct types, union types, etc. Then you have a language like old-school ...
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matlab - Plotting electrical field lines on a 2d plane - Software ...
This question is ambiguously defined. Electrical field lines (as referenced in the title) are not the same as equipotential lines. Specifically the electric field E followed by electric field lines is related to the electric potential field V by E = −∇V. In the case of electrical potential, this is a scalar field so equipotential lines are simply contours of constant value of that field ...
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c++ - Passing parameters that need to be copied by value or const ...
@rwong: using "const reference" for function parameters in C++ is not more or less idiomatic than just passing parameters by value. It is typically (but not exclusively) used for passing "big" objects to avoid unnecessary copying, but in the example above, a copy is made in both cases.
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Why exactly does Java not allow numeric conditionals like if(5 ...
0 Well, every scalar type in C, pointer, boolean (since C99), number (floating-point or not) and enumeration (due to direct mapping to numbers) has a "natural" falsey value, so that's good enough for any conditional expression.
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Variables (scalars and matrices) assignment in Python
Noted. Since the scalar is created using python, it is not behaving similar to array/matrix created by Numpy. I understand that: If we have to initialize 5 matrices, it is better to initialize separately. This way they are representing separate links to 5 separate matrices.