cols t vs key flip value t

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1

https://learninghub.kx.com/forums/topic/cols-t-vs-key-flip-value-t

At least twice in tick.q

key flip value t is used to get the columns names of the table t.

Would cols t not do the same job?

If so, surely key flip value t has a greater memory overhead.

2

Perhaps the author was trading memory for speed?

q)t:flip(`$'.Q.a)!26 10000000#26000000?1000 
q)(cols `t)~key flip value `t 1b 
q)ts:10000 cols `t 12 528 
q)ts:10000 key flip value `t 2 880

One of the loveliest aspects of working in q is how easy it is to experiment like this!