How to print an array with at most 2 digits for float?

[mepython]

I like to print following:
[["Customer", "John", 84.9535929148379, ["USE", 10.0]], ["IN",
84.9535929148379], ["USE", 94.9535929148379], ["OUT",
94.9535929148379]]

like

[["Customer", "John", 84.95, ["USE", 10.0]], ["IN", 84.95], ["USE",
94.95], ["OUT", 94.95]]


I tried with pp, but it does not truncate floats. Items in Array can be
arbitary in length.

 

[Csaba Henk]

I like to print following:
[["Customer", "John", 84.9535929148379, ["USE", 10.0]], ["IN",
84.9535929148379], ["USE", 94.9535929148379], ["OUT",
94.9535929148379]]

like

[["Customer", "John", 84.95, ["USE", 10.0]], ["IN", 84.95], ["USE",
94.95], ["OUT", 94.95]]


I tried with pp, but it does not truncate floats. Items in Array can be
arbitary in length.

Yes, pp gives a precise representation of the object as much as
possible, and I like it this way...

In similar situation I just use the following hack:

x # => 45.235234
(100 * x).to_i.to_f / 100 # => 45.23

You can make a float method of it to hide the clutter

But maybe there is a better way...

I see you want to do it recursively, but I guess that's not a problem to
implement.

Csaba

 

[Robert Klemme]

I like to print following:
[["Customer", "John", 84.9535929148379, ["USE", 10.0]], ["IN",
84.9535929148379], ["USE", 94.9535929148379], ["OUT",
94.9535929148379]]

like

[["Customer", "John", 84.95, ["USE", 10.0]], ["IN", 84.95], ["USE",
94.95], ["OUT", 94.95]]


I tried with pp, but it does not truncate floats. Items in Array can be
arbitary in length.

Not 100% what you want though...

conv = lambda do |e|
case e
when String
e
when Enumerable
e.map &conv
when Float
sprintf( "%3.2f", e )
else
e
end
end

a= [["Customer", "John", 84.9535929148379, ["USE", 10.0]], ["IN",
84.9535929148379], ["USE", 94.9535929148379], ["OUT",
94.9535929148379]]

a.map &conv

?> a.map &conv
=> [["Customer", "John", "84.95", ["USE", "10.00"]], ["IN", "84.95"],
["USE", "94.95"], ["OUT", "94.95"]]

inj = lambda do |(f,s),e|
s << ", " if f

case e
when String
s << e.inspect
when Enumerable
s << "["
e.inject([false, s], &inj)
s << "]"
when Float
s << sprintf( "%3.2f", e )
else
s << e.inspect
end

[true,s]
end

puts( a.inject([false, ""],&inj)[1] << "]" )

puts( a.inject([false, ""],&inj)[1] << "]" )

["Customer", "John", 84.95, ["USE", 10.00]], ["IN", 84.95], ["USE", 94.95],
["OUT", 94.95]]

Better. As usual - with #inject...

Kind regards

robert

 

[Martin DeMello]

I like to print following:
[["Customer", "John", 84.9535929148379, ["USE", 10.0]], ["IN",
84.9535929148379], ["USE", 94.9535929148379], ["OUT",
94.9535929148379]]

like

[["Customer", "John", 84.95, ["USE", 10.0]], ["IN", 84.95], ["USE",
94.95], ["OUT", 94.95]]

I tried with pp, but it does not truncate floats. Items in Array can be
arbitary in length.A

Ugly, but if this is just for debugging purposes you can do the
following:

class Float
def inspect
if $truncate
#round to $truncate places
else
self.to_s
end
end
end

and depending on the global it'll round off or not

martin

 

[mepython]

This should serve my purpose. Thanks.