shithub: mc

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Add htcount.

	It's useful to know how many entries are in a hashtable.

--- a/lib/std/htab.myr

+++ b/lib/std/htab.myr

@@ -26,6 +26,7 @@

 	generic htgetv	: (ht : htab(@k, @v)#, k : @k, fallback : @v-> @v)

 	generic hthas	: (ht : htab(@k, @v)#, k : @k -> bool)

 	generic htkeys	: (ht : htab(@k, @v)# -> @k[:])

+	generic htcount	: (ht : htab(@k, @v)# -> std.size)

 	generic byhtkeyvals	: (ht : htab(@k, @v)# -> htkviter(@k, @v))

 	impl iterable htkviter(@k, @v) -> (@k, @v)

@@ -205,6 +206,10 @@

 		;;

 	;;

 	-> keys

+}

+

+generic htcount = {ht

+	-> ht.nelt

 }

 generic byhtkeyvals = {ht