min / max / etc
Definition: |
object res = min(object x, y)
-- or -- object res = min(sequence s) (see technicalia) -- or -- object res = smallest(sequence s, bool return_index=false) -- or -- object res = sq_min(object a, b) |
Description: | Returns the smallest of x and y, or the smallest element in sequence s.
Atoms are considered to be less than sequences. Sequences are compared "alphabetically" (case sensitive,
ie 'Z'<'a') starting with the first element until a difference is found.
The sq_min(a,b) function applies min() to the top-level elements of a and b when they are both sequences, in which case they must be the same length, otherwise it applies an atom to all the elements of the other, or if they are both atoms it behaves identically to min(a,b). The result is a sequence in all but the latter case. Note that it is not recursive, and passing a single argument to sq_min() is not allowed. As of 1.0.3, the smallest() function became a simple alias of minsq(), and is now the preferred name. There are similar functions max(), sq_max(), maxsq(), and largest() for obtaining (you’ve guessed it) the largest. There are no sq_smallest or sq_largest routines. |
Additional: |
atom res = median(sequence s) s must be a non-empty sequence on entry, and pre-sorted for meaningful results (not verified). Returns the middle element for odd-length sequences, or the average of the middle two elements for even-length sequences. Yields the same result as average() when the spread is perfectly balanced, eg {1,40,50,60,99}. |
pwa/p2js: | Supported. |
Example: |
a = min(7,5) -- a is 5 b = min({9,7,5}) -- b is 5 c = min("two","three") -- c is "three" d = min({"one","two","three","four"}) -- d is "four" s = sq_min(s,1) -- no element of s is now > 1 ?smallest({"this",{3,5,7},9}) -- prints 9 ?largest({"this",{3,5,7},9}) -- prints "this" |
Implementation: | See builtins\pmaths.e (an autoinclude), and psqop.e, and the technicalia dropdown, for details of the actual implementation. |
See Also: |
equal,
compare,
relational operators,
sequence operations |