On 09/09/14 18:39, j...@souslelogo.com wrote:
Hi list
I am trying to improve the speed of a large script including
many loops.
Could anyone explain why :
- question 1 : if a text file contains "toto", after running the
following lines
open file tpath
read from file tpath until EOF
write (it & return & "titi") to file tpath
close file tpath
the file contains :
totototo
titi
Because you are doing this:
reading the contents of file tpath
and THEN writing that ('toto') and 'titi' back to the file.
So 'toto' + 'toto' + return + 'titi' is what you end up with.
---------------------------------------------------------------
and when running these lines
open file tpath
read from file tpath until EOF
close file tpath
open file tpath
write (it & return & "titi") to file tpath
close file tpath
the file contains :
toto
titi
Because here you close the file for reading and then open it again.
In the first case your information is appended to the existing file.
In the second case your information overwrites the existing file.
-----------------------------------------------------------------
- question 2
why is this line
put "toto" after URL ("binfile:/hd/myFile.txt")
much slower than
open file tpath
read from file tpath until EOF
close file tpath
open file tpath
write (it & return & "toto") to file tpath
close file tpath
I don't know.
Thanks in advance.
jbv
Best, Richmond.
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