Reference/dotzdotW

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new feature in 2.5 2008.12.31

.z.W returns a dictionary of ipc handles with the number of bytes waiting in their output queues.

In 2.6 this was changed to a list of bytes per handle, see Release Notes

e.g.

q)h:hopen ...
q)h
3
q)neg[h]({};til 1000000); neg[h]({};til 10); .z.W
3| 4000030 70
q)sum each .z.W
3| 0
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