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In K3, Find is [[atomicity|non-atomic.]] It considers <code>y</code> as a single unit, and will return a single index for it. <code>?/:</code> is needed to simulate the functionality of later Ks. |
In K3, Find is [[atomicity|non-atomic.]] It considers <code>y</code> as a single unit, and will return a single index for it. <code>?/:</code> is needed to simulate the functionality of later Ks. |
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[[Category:Verbs]] |
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[[Category:Named verbs]] |
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[[Category:Operator verbs]] |
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[[Category:Primitives]] |
Latest revision as of 06:40, 9 July 2022
Find
x?y
The find primitive is used to find the index of an atom y
in array x
. It returns 0N
if the element is not found.
Find is right atomic.
"XYZ"?"XYXZB" 0 1 0 2 0N 5 8 5?56 8 1 5 0N 1 0N 0
For dictionaries, returns the keys associated with the given values:
(`a`b`c`d!23 14 9 5)?9 14 `c`b
K3[edit]
In K3, Find is non-atomic. It considers y
as a single unit, and will return a single index for it. ?/:
is needed to simulate the functionality of later Ks.