home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Power-Programmierung
/
CD1.mdf
/
magazine
/
nan_news
/
toolkit
/
aading.prg
< prev
next >
Wrap
Text File
|
1991-08-15
|
5KB
|
167 lines
/*
* File......: Aadding.prg
* Author....: Ralph Oliver, TRANSCOM SYSTEMS
* CIS ID....: 74030,703
* Date......: $Date: 15 Aug 1991 23:05:40 $
* Revision..: $Revision: 1.1 $
* Log file..: $Logfile: E:/nanfor/src/aading.prv $
*
* This is an original work by Ralph Oliver and is placed in the
* public domain.
*
* Modification history:
* ---------------------
*
* $Log: E:/nanfor/src/aading.prv $
*
* Rev 1.1 15 Aug 1991 23:05:40 GLENN
* Forest Belt proofread/edited/cleaned up doc
*
* Rev 1.0 07 Jun 1991 23:03:08 GLENN
* Initial revision.
*
*
*/
/* $DOC$
* $FUNCNAME$
* FT_AADDITION()
* $CATEGORY$
* Array
* $ONELINER$
* Add elements unique of source array to target array
* $SYNTAX$
* FT_AADDITION( <aList1>, <aList2> [, <lTrimmer> [, <lCaseSens> ] ] ) ;
* -> aNewArray
* $ARGUMENTS$
* <aList1> is the primary array.
*
* <aList2> is the secondary array.
*
* <lTrimmer> is a logical value denoting whether leading or
* trailing spaces should be included in the
* comparison. If .T., then ignores spaces in
* comparison, defaults to .T., .F. includes spaces.
*
* <lCaseSens> is a logical value denoting case sensitivity.
* If .T., then comparison is sensitive to case,
* defaults to .T., .F. ignores case.
* $RETURNS$
* An array of the union of aList1 and aList2.
* $DESCRIPTION$
* This function will add the elements unique of aList2 with aList1.
* It returns a new array including all the elements of aList1
* plus the unique elements of aList2.
* $EXAMPLES$
* aList1 := {"apple", "orange", "pear"}
* aList2 := {"apple ", "banana", "PEAR"}
*
* FT_AADDITION( aList1, aList2 )
* // ignores spaces, sensitive to case
* // returns {"apple","orange","pear","banana","PEAR"}
*
* FT_AADDITION( aList1, aList2, , .F. )
* // ignores spaces, not sensitive to case
* // returns {"apple","orange","pear","banana"}
*
* FT_AADDITION( aList1, aList2, .F., .F. )
* // sensitive to spaces, not sensitive to case
* // returns {"apple","orange","pear","apple ","banana"}
* $END$
*/
#ifdef FT_TEST
FUNCTION MAIN()
LOCAL aList1,aList2,var0,nstart,nstop,nelapsed,nCtr
CLS
? "TEST TO DEMONSTRATE EXAMPLES OF FT_AADDITION"
?
aList1 := {"apple", "orange", "pear"}
aList2 := {"apple ", "banana", "PEAR"}
? "aList1 : "
AEVAL( aList1, { |x| QQOUT(x + ",") } )
?
? "aList2 : "
AEVAL( aList2, { |x| QQOUT(x + ",") } )
?
nstart := SECONDS()
FOR nCtr := 1 to 100
var0 := FT_AADDITION( aList1, aList2 )
NEXT
nstop := SECONDS()
nelapsed := nstop - nstart
? "time for 100 merges:", nelapsed
? PADR("FT_AADDITION( aList1, aList2 ) ->",44)
AEVAL( var0, { |x| QQOUT(x + ",") } )
?
var0 := FT_AADDITION( aList1, aList2, , .F. )
? PADR("FT_AADDITION( aList1, aList2, , .F. ) ->",44)
AEVAL( var0, { |x| QQOUT(x + ",") } )
?
var0 := FT_AADDITION( aList1, aList2, .F., .F. )
? PADR("FT_AADDITION( aList1, aList2, .F., .F. ) ->",44)
AEVAL( var0, { |x| QQOUT(x + ",") } )
?
RETURN NIL
#endif
FUNCTION FT_AADDITION( aList1, aList2, lTrimmer, lCaseSens )
LOCAL nElement, nPos, bScanCode
LOCAL aNewArray := ACLONE( aList1 )
// Set default parameters as necessary.
IF lCaseSens == NIL
lCaseSens := .T.
ENDIF
IF lTrimmer == NIL
lTrimmer := .T.
ENDIF
// Assign code blocks according to case sensitivity and trim.
IF lCaseSens
IF lTrimmer // Ignore spaces.
bScanCode := { |x| ;
ALLTRIM( x ) == ;
ALLTRIM( aList2[ nElement ]) }
ELSE
bScanCode := { |x| ( aList2[ nElement ]) }
ENDIF
ELSE // Ignore case.
IF lTrimmer // Ignore spaces.
bScanCode := { |x| ;
UPPER( ALLTRIM( x )) == ;
UPPER( ALLTRIM( aList2[ nElement ] )) }
ELSE
bScanCode := { |x| ;
UPPER( x ) == ;
UPPER( aList2[ nElement ] ) }
ENDIF
ENDIF
// Add the unique elements of aList2 to aList1.
FOR nElement := 1 TO LEN( aList2 )
nPos := ASCAN( aList1, bScanCode )
// If unique, then add element to new array.
IF nPos = 0
AADD( aNewArray, aList2[ nElement ] )
ENDIF
NEXT
RETURN ( aNewArray )