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Which is correct: pass-through or passthrough or pass through?

I googled to find the correct wording, but found the 3 and not sure at all what is the correct one and/or there is a some domain specific rules.

I want to describe a process in which an information goes from input to output without any change.

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closed as off-topic by TrevorD, MετάEd, tchrist, Hellion, p.s.w.g Sep 6 '13 at 20:36

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Pass through seems what you need since PASS-THROUGH 1 : the act, action, or process of offsetting increased costs by raising prices 2 : an opening in a wall between two rooms through which something (as dishes) may be passed – mplungjan Sep 4 '13 at 9:33
Are you looking for a verb or a noun or an adjective? – Janus Bahs Jacquet Sep 4 '13 at 9:48
does it means that the dictionary use "-" and that the 2 others version with or without space are wrong ? – alexbuisson Sep 4 '13 at 9:58
That is not a dash, that is a hyphen. – RegDwigнt Sep 4 '13 at 10:08
up vote 0 down vote accepted

Without anymore context it's hard to tell exactly what you need. I would avoid using PassThrough unless you're actually using the Point Cloud Library's PassThrough filter, as it may get confusing.

If you're talking about actual filters I would use Pass-Through. Most signal processing filters are hyphenated(Low-Pass, High-Pass..).

If your just describing the flow of information through some function, it should be perfeclty fine to say something like "The derived column is type cast to a/n [datatype], and the rest of the table data passes through the module unchanged.

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Why the capitalisation for Pass-Through? – TrevorD Sep 4 '13 at 12:57
Good question. I'd say Pass-through works equaly well or even pass-through if he's not actually naming a filter. I have a tendency to capitalize the secondWord when naming variables. – TsSkTo Sep 4 '13 at 13:11

You found all three on Google because all three are acceptable depending on circumstances.

As a guideline -

  • use pass-through where it is an adjective before a noun (or sometimes an object-verbal noun compound such as egg-beater): They inspected the pass-through residue in the sediment trap.

  • use passthrough as a noun, unless this makes it too long and cumbersome: He found a passthrough in the wall.

Pass through is two words: I saw him pass through a closed door.

The principle is to maximise clarity. A man eating shark and a man-eating shark are two very different things, but a Sunday morning service and a Sunday-morning service are not so you could leave out the hyphen in the latter.

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