fixd: Fix an rdeque

Description Usage Arguments Details Value References

Description

Maintains the invariant that there is always something in two stacks used by rdeques under the hood so long as there is 2 more elements in the rdeque.

Usage

1
fixd(d, ...)

Arguments

d

rdeque to fix.

...

additional arguments to be passed to or from methods (ignored).

Details

In fact, fix will be called whenever there are fewer than 6 elements in both the front and end of the deque. Generally this method is O(N), and so a full copy is returned.

Value

fixed, "balanced" deque.

References

Okasaki, Chris. Purely Functional Data Structures. Cambridge University Press, 1999.



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