What does ! do to map? [Was: When is map useful (as apposed to noremap)]

On 07.05.14 18:26, Elijah Griffin wrote:
> map t 7
> map! t 7

Trying ":h map!", I find no words describing what the '!' does to map.

Scanning all of map.txt for "map!", no further clue was revealed.
Scanning all of map.txt for "!", its indicator meaning in a "map-listing"
was revealed, but still no description of what it might do in the other
context.

Trying ":h !" just finds: *:!cmd* *:!*

There is a table at "*mapmode-ic* *mapmode-i* *mapmode-c* *mapmode-l*",
which includes:

commands: modes:
Insert Command-line Lang-Arg
:map! :noremap! :unmap! :mapclear! yes yes -

but that omits "map", so it does not help to infer what '!' does to
"map". ("map" appears in the "*map-overview* *map-modes*" table, but
that is an orthogonal view, allowing no comparison with "map!")

The search was first conducted in 7.3, but I've just built 7.4, with the
same results.

Is there any way to find an explanation of the effect of the modifier,
in the help?

Erik

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The UN also estimates that the current global population of 7.2 billion will
reach 9.6 billion by 2050. That is a faster rate of growth than previously
estimated. - http://www.bbc.co.uk/news/world-asia-22907307

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