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Keywords: sort a flat file
;Make a test file to sort ; 4 fields ;Field 1 chars 1-20 len 20 ;space ;Field 2 chars 22-25 len 4 ;space ;Field 3 chars 27-30 len 4 ;space ;Field 4 char 32-78 len 47 ;Dummy field 5 79-80 @CRLF ;for this test case fields 1 2 and 4 are identical. Field 3 is a random ;number we will sort on later. ;Create test file fn="c:\incoming\test.dat" fnsort="c:\incoming\test.sort" handle=FileOpen(fn,"WRITE") f1=strfix("f1f1f1f1"," ",20) f2=strfixleft(555,0,4) f4=strfix("random text"," ",47) for xx=1 to 200 f3=strfixleft(Random(9999),0,4) FileWrite(handle,strcat(f1," ",f2," ",f3," ",f4)) next FileClose(handle) ;Now sort it of field 3 fs=FileSize(fn) bb=BinaryAlloc(fs) BinaryRead(bb,fn) recsize=80 keyoffset=26 ; Field 3 offset 0 based keysize=4 BinarySort(bb,recsize,keyoffset,keysize,@ASCENDING) ; string sort BinaryWrite(bb,fnsort) BinaryFree(bb) Message("ALL","DONED")
Article ID: W14848
File Created: 2001:11:08:12:40:24
Last Updated: 2001:11:08:12:40:24