limit attachment on qmail [closed] - attachment

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Is it possible to limit the size of attachment that can be send or received in qmail. Its to stop mail forwardings with large sizes amoung employees.

The maximum message size for emails in a qmail-installation is normally defined by the following file:
./qmail/control/databytes
The size is defined in bytes. Example:
50000000
Limit would be: 50000000Bytes = 48,828Kb = 47,68MB

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How to further calculate result of FILTER? [closed]

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one of my filter functions results
2020-03-10 15:00:57
2020-03-10 14:14:42
2020-03-10 12:50:25
second one results
2020-03-10 15:59:39
2020-03-10 14:52:37
2020-03-10 13:57:48
I would like to write a single function that would do something like
=sum(filterTable2.firstArgument-filterTable1.firstArgument, filterTable2.secondArgument-...)
but i can't manage to find a solution

if rebinding doesn’t mutate the existing memory location of a variable, how do i get the old value after a rebind. forexample: [closed]

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cat_poop = 12
> 12
if i rebind cat_poop to a new value forexample:
cat_poop = 20
> 20
So how do i get the first value of cat_poop after a rebind
You cannot get the previous value after an Elixir variable is rebound.

GeoCoding in Rails for polygon bounds [closed]

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Is there a way in rails via some mapping API/gem where I can define map areas/map zones (with polygon bounds) and detect if an address falls within a particular zone/area.
This is easily done with geokit.
First construct a polygon from LatLng:
polygon = Geokit::Polygon.new([
Geokit::LatLng.new(0,0),
Geokit::LatLng.new(10,0),
Geokit::LatLng.new(10,10),
Geokit::LatLng.new(20,10),
Geokit::LatLng.new(20,0),
Geokit::LatLng.new(30,0),
Geokit::LatLng.new(30,20),
Geokit::LatLng.new(0,20)
])
Then you can test if the polygon contains a LatLng:
point = Geokit::LatLng.new(5,5)
polygon.contains?(point) # => true

Convert from inches,lbs to centimeter,kg in iOS [closed]

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Closed 9 years ago.
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I have a problem:
My app allow user choose 2 options : Metric or Imperial.
If user select "Metric", height(cm), weight(kg).
If Select "Imperial: height(inch) and weight (lbs).
I need to change value of height from inch to centimeter and weight from lbs to kg.
Example :
user input : 70 (inch) and 120 (lbs) ==> convert to 177.8 (cm) and 54.5 (kg)
Thanks in advance.
The best example of unit convert is below link..

AudioPlayer fast Forward in Xcode [closed]

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Is there a way to fast forward an audio file by x2, x4 etc by the use of a button? If not, do you have any idea how this would be possible?
NSTimeInterval *timeIntervel = [yourPlayer currentTime];
timeIntervel = timeIntervel + timeToForword;
[yourPlayer setCurrentTime:timeIntervel];
[yourPlayer play];

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