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The Select function was renamed as IfElse.
Updates #cleanup
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
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Add Int which converts a bool into an integer.
Updates tailscale/corp#22024
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
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The IfElse function is equivalent to the ternary (c ? a : b) operator
in many other languages like C. Unfortunately, this function
cannot perform short-circuit evaluation like in many other languages,
but this is a restriction that's not much different
than the pre-existing cmp.Or function.
The argument against ternary operators in Go is that
nested ternary operators become unreadable
(e.g., (c1 ? (c2 ? a : b) : (c2 ? x : y))).
But a single layer of ternary expressions can sometimes
make code much more readable.
Having the bools.IfElse function gives code authors the
ability to decide whether use of this is more readable or not.
Obviously, code authors will need to be judicious about
their use of this helper function.
Readability is more of an art than a science.
Updates #cleanup
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
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The bools.Compare function compares boolean values
by reporting -1, 0, +1 for ordering so that it can be easily
used with slices.SortFunc.
Updates #cleanup
Updates tailscale/corp#11038
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
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