OpenEuphoria

Re: File input.output

• Posted by bobspringett <bobspringett at WANADOO.FR> Aug 29, 2000
• 500 views

Irv,
Had a further look at your suggestions. Couldn't quite understand the purpose of
the line numbers=numbers[2]. Seems as though your
saying the sequence numbers is now = the second item in numbers.
A further point. I've made up a short code along the lines of your suggestion
and a strange thing is happening. The codes generates
some floating point data which round limits to 2 decimal places, it saves O.K
and gives a length of 10.
However when I load the data into the sequence testData and print it a further
couple of braces has slipped in and the length is now
two.
I've omitted the round function and I still get the same thing happening. Would
you mind commenting on it for me please.
CODE:
--include misc.e
include file.e
include get.e
include print.e
include round.e
with trace
--trace(1)

sequence y
atom x

y={}
atom filenum
sequence testData
for i=1 to 10 do
x=rand(999)+i/9
x=round(x,2)
y=y & x
end for
filenum=open("c:\\euphoria\\tester.txt","w")
print(filenum,y)
close(filenum)
print(1,"Finished filing")
print(1,y)
 sleep(10)
 print(1,"                                                          ")
 filenum=open("c:\\euphoria\\tester.txt","r")
testData=get(filenum)
close(filenum)
print(1,testData)
print(1,"Finished loading and displaying")
sleep(10)
----- Original Message -----
From: irv <irv at ELLIJAY.COM>
To: <EUPHORIA at LISTSERV.MUOHIO.EDU>
Sent: Sunday, August 27, 2000 9:42 PM
Subject: Re: File input.output


> On Sun, 27 Aug 2000, BOB wrote:
> > I would like to be able to SAVE a sequence of  floating point numbers(say a
> > few hundred) to a file in one PUTS and then retrieve
> > that data from file back into a sequence in one GETS.
> > Looking at the documentation of GETS it would seem that I can't.
> > Secondly will I be able to look at what's in the file using  Explorer to see
> > if I have filed the right information.
> > Really all I'm trying to do is to SAVE and LOAD a 'sequential file'
> > reasonably quickly.
> > Regards
>
> It looks like you've gotten several answers, but based on your requirements,
> I also to suggest  using print() and get().  It's quick and easy, and hard ato
> break.
>
> --  tested code:
> include get.e
> object numbers
>  numbers = {1.23, 3.14159, 6, 8, -23.5, 12.99}
>
> atom fn
> fn = open("my.dat","w")
> print(fn, numbers)
> close(fn)
>
> fn = open("my.dat","r")
> numbers = get(fn)
> close(fn)
> if numbers[1] = GET_SUCCESS then
>    numbers = numbers[2]
> else
>   puts(1,"ERROR READING FILE")
> end if
> ? numbers
>
> If you plan to store lots of strings in your files, you really need to
> downloading Gabriel Boehme's PRINT.E - this small library causes the print()
> function to write text in plain, human readable form, while still being
> readable by Euphoria's get() function.
>
> I have been using this method for many months in several commercial programs
> without any  problems These programs typically read (modify) and write files
> of
> about half a meg hundreds of times each day.
>
> By the way, these files will be plain text, so probably NotePad or similar
> would be just fine for viewing them.
>
> Regards,
> Irv