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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
- 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
- Should you ever mix scalar and list contexts anyway?
In scalar context, it returns the one value of that list that you probably want if you only want one value That's the UID of the named user There's no rule that governs what a particular thing will do in scalar context other than giving you the value that most people probably want
- Array Multiplication and Division - Software Engineering Stack Exchange
In mathematics, if k is a scalar and v is a vector, then k v is scalar-vector multiplication, but v k is undefined It's always scalar-vector multiplication, and never vector-scalar multiplication
- 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
- 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
- performance - Why does expressing calculations as matrix . . .
If I were to calculate the matrix multiplication in the second (matrix-based) image myself, as a human, I'd do it by sequentially doing each of the distinct calculations shown in the first (scalar) image To me, they are nothing but two notations for the same sequence of calculations Why is it different for my computer?
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