At the bottom of the very post you linked are some comments.
Well it would work perfectly if the time query returned correctly. It seems as of now using MC 1.8-pre1 is that unless you issue a command /time set day or such then the time continues the count and doesn't start over from 0 as it is shown in the wiki. I think I'm probably going to check with Mojang's bug tracker and see if this is an open issue. – JRSoftyAug 23 at 18:53
Last time I checked the time query was broken, am I wrong? I could sure use it if it wasn't, putting it in a score would mean that I wouldn't have to place a daylight sensor at all
Load the hopper with 63 of each of the first 5 items and load the second one with 63 of the last 4 plus a tool of any kind then have a comparator test for full hoppers. the items go in the bottom two hoppers. of course you will have to empty the hopper of the single items when done to reset it.
You can make a single player with an objective, [Wall open] set to 1
have a hopper clock set to /testfor @p[r=4,score_[Wall open]=1] with a comparator next a command block with a torch attached to it's side that command should /fill x y z wall locations with air
on top of the torch a second command block that fills to make the wall again, once the testfor fails the command to make the wall will go off.
span>OldVeth, try summoning a villager with custom trading. Maybe it converts 64 arrows into one "Arrow block" or something and converts 4 of those into a diamond axe.
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testforblocks <x1> <y1> <z1> <x2> <y2> <z2> <x> <y> <z> [mode]
http://minecraft.gamepedia.com/Commands#testforblocks
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At the bottom of the very post you linked are some comments.
I was really hoping it was fixed but I guess not
https://bugs.mojang.com/browse/MC-69108?filter=10613&jql=project = MC AND status = Open AND text ~ "time query" ORDER BY affectedVersion
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http://www.mediafire.com/download/gah84zvrp88l0nv/Mini.zip
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have a hopper clock set to /testfor @p[r=4,score_[Wall open]=1] with a comparator next a command block with a torch attached to it's side that command should /fill x y z wall locations with air
on top of the torch a second command block that fills to make the wall again, once the testfor fails the command to make the wall will go off.
Here is the save file http://www.mediafire.com/download/wr4p8ckno7jubfb/wall.zip
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http://mcstacker.bimbimma.com/
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Can we make villagers see custom NBT tags yet?