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within

Check bounds

x within y    within[x;y]

Where

  • x is an atom or list of sortable types
  • y is a pair of lower and upper bounds, or a pair of lists of lower and upper bounds that conform to x

returns a boolean for each item of x indicating whether it is within the inclusive bounds given by y.

q)1 3 10 6 4 within 2 6
01011b
q)"acyxmpu" within "br"  / chars are ordered
0100110b
q)select sym from ([]sym:`dd`ccc`ccc) where sym within `c`d
sym
---
ccc
ccc
q)5 within 5 5           / bounds are inclusive
1b
q)5 within 6 2           / lower bound greater than upper bound
0b

The result conforms to x and to the items of y.

q)5 within (1 2 6;3 5 7)
010b
q)2 5 6 within (1 2 6;3 5 7)
111b
q)(1 3 10 6 4;"acyxmpu") within ((2;"b");(6;"r"))
01011b
0100110b

within is a multithreaded primitive.

except, in, inter, union

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