dynamic array help please

[rsballard]

I have a bunch of files to process, each will have a different number of items to deal with.

define some dynamic arrays
var array1, array2, array3: array of double;

open the first file and scan through it to determine how many data items to process

allocate memory for each array
SetLength(array1,count);
SetLength(array2,count);
SetLength(array3,count);

do my thing and read and process the data for one file...

Now, my question is, to zero/release those arrays in preparation for the next file, is it corrrect to free the space used for those arrays like this:

SetLength(array1,0);
SetLength(array2,0);
SetLength(array3,0);

and then get ready to do it all over again for the next file? If not, what is the best technique to release memory before re-allocating to the new, most likely different, size for the next file? And how about releasing all memory used at the end of the job upon exit?

Thanks
Bob

 

[McMerfy]

Setting lengh to 0 will do the job. Also you can set array variable to nil or call to Finalize procedure.

--- markus

 

[LorenPechtel]

It's not neccessary to release it anyway--next time you set the length it gets released. Setting the length to zero does have one benefit, though--the array is zeroed.

 

[rsballard]

Thanks, I'm initializing for each new file after counting lines and the resetting to 0 when through. Seems to work well.

Bob