- 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
- 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
- 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
- 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
- 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
- Vector operations: vec1. dot(vec2) vs vec1 * vec2 vs dot(vec1, vec2)
What's your preferred way to implement use vector operations? vec1 dot(vec2) allows to reuse vec1 but is hard to read for longer equations dot(vec1, vec2) A friend of mine prefers this as "dot"
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