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Write String to a File question

netbug

Dear all,

This is a simple question.

I am using a form to collect data entered by the user. I would like to store this data into a text file, separating each field into different lines in the text file.

I have come up with a solution that is far away from being the best. I have stored all the information into a string and then I've parsed into a list. After that each element of list is written into the file in separate lines.

Please find my code below. In this case I am already passing the list and not the string.

Thanks in advance,

Pedro

procedure(WriteToFile(myPath myList)
let((myPort FileExists txtStr delimiter)
FileExists=isFileName(myPath) ; Test if the file exists

; Check if config file exists
if((FileExists==t) then
printf("File Exists !")
else
myPort=outfile( myPath ) ; open file for write
for( i 0 length(myList)-1 ; loop through the list
str=nth(i myList)
fprintf(myPort "%s\n" str) ; write string to file
)
close( myPort ) ; close file
printf("File Created !")
); end if
); End let
); End procedure

 

Parents
  • Andrew Beckett

    I disagree. The code is using a for loop to iterate over a list, and then nth() to access each element. If the list isn't too long, that's OK, but it's a bad paradigm to start using - it will lead you into trouble. The reason being that lists are sequential, so doing this is order of N^2 (each time you use nth it has to start counting from the beginning of the linked list). It would be better to use foreach() over the list, or you could use pprint() to write the list out in one go - and then lineread to read it back in again. 

    You might also want to look at http://community.cadence.com/cadence_technology_forums/f/48/p/13412/20801#20801which gives an example of saving info from a form and loading it again later.

    Regards,

    Andrew

Reply
  • Andrew Beckett

    I disagree. The code is using a for loop to iterate over a list, and then nth() to access each element. If the list isn't too long, that's OK, but it's a bad paradigm to start using - it will lead you into trouble. The reason being that lists are sequential, so doing this is order of N^2 (each time you use nth it has to start counting from the beginning of the linked list). It would be better to use foreach() over the list, or you could use pprint() to write the list out in one go - and then lineread to read it back in again. 

    You might also want to look at http://community.cadence.com/cadence_technology_forums/f/48/p/13412/20801#20801which gives an example of saving info from a form and loading it again later.

    Regards,

    Andrew

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