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terminology - What does it mean when data is scalar? - Software . . . The word scalar derives from the Latin word scalaris, an adjectival form of scala (Latin for "ladder") The English word "scale" also comes from scala Source A Scalar is a variable that holds an individual value For example: Scalar Variable: Say that you are trying to represent the names of various students as a set of variables Each of the
Why exactly does Java not allow numeric conditionals like if(5 . . . 1 The controlling expression of an if statement shall have scalar type Semantics 2 In both forms, the first substatement is executed if the expression compares unequal to 0 In the else form, the second substatement is executed if the expression compares equal to 0 If the first substatement is reached via a label, the second substatement is
data structures - How to represent a set in JSON? - Software . . . Take a scalar, say 0 or null and force it to be the value of every key in the map: {"a": 0, "b": 0} This way, under standard comparison tools, the objects are equal, even if the key ordering is changed However, this technique pollutes the JSON document with irrelevant data [4] - As an ordered list
What is meant by a primitive data type? 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
performance - Why does expressing calculations as matrix . . . Using SIMD instructions (confusingly, this is also called "vectorization" but in a different sense than in the text quotes in the question) In essence, instead of 4 or 8 or so scalar arithmetic instructions, give the CPU one instruction that performs arithmetic on 4 or 8 or so registers in parallel This can literally make some calculations
Whats faster. . Multiple variables or single array? The compiler may apply scalar replacement of aggregates (SRA, SRoA), which means the local array (which is used in elementwise single assignment way) approach and the local variables approach might be optimized in the same way, without requiring a stack space for hundreds of float elements or variables
Algorithm for detection of overlapping between vectors where k is some scalar value in [0, 1] When you have transformed all your inputs into this form, it's fairly straightforward to find solutions where the lines overlap: When you have transformed all your inputs into this form, it's fairly straightforward to find solutions where the lines overlap: