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No, it stems from North American use of ÷ for division, which is then ASCIIfied to %.
by abrudz 3y ago
No, it stems from North American use of ÷ for division, which is then ASCIIfied to %.
- nerdponx 3y agoI get that, but why is / "over"?
- tosh 3y ago+/1 2 3 4 5 meaning plus over 1 2 3 4 5 meaning the plus reduction of 1 2 3 4 5 meaning 1+2+3+4+5 meaning 15 "over" (/) is a higher order function that takes the function "+" and applies it to "1 2 3 4 5" over can also be used with * */1 2 3 4 5 meaning the product reduction of 1 2 3 4 5 meaning 120 "/" as "over" comes from a mathematical notation by Ken Iverson: APL (A Programming Language) [0][1] which Ken names "reduction" (h/t mlochbaum) > An operation (such as summation) which is applied to all components of a vector to produce a result of a simpler structure is called a reduction. "/" is known as "insert" in J [2] and "over" in k dialects (like Goal)[3]. [0] https://en.wikipedia.org/wiki/APL_(programming_language)#Mathematical_notation https://en.wikipedia.org/wiki/APL_(programming_language)#Mat... [1] https://www.softwarepreservation.org/projects/apl/Books/APROGRAMMING%20LANGUAGE https://www.softwarepreservation.org/projects/apl/Books/APRO... [2] https://code.jsoftware.com/wiki/Vocabulary/slash https://code.jsoftware.com/wiki/Vocabulary/slash [3] https://k.miraheze.org/wiki/Primitives https://k.miraheze.org/wiki/Primitives
- tosh 3y agoalso see "/" as "over" in k reference (see Chapter 5) http://www.nsl.com/k/k2/k295/kreflite.pdf http://www.nsl.com/k/k2/k295/kreflite.pdf and "over" in the Q reference: https://code.kx.com/q/ref/over/ https://code.kx.com/q/ref/over/