combineMultiplyValues ( list1 ; list2 )

a short CF to sequentially multiply numeric values between two different lists

Average rating: 4.5 (22 votes) Log in to vote

Eduardo Lemos
n/a
http://donthaveone.com

Sample input:

ListA = "2¶3¶4¶5¶6"
ListB = "6¶5¶4¶3¶2"

Sample output:

with operator = "*", the result is
"12¶15¶16¶15¶12"

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

/**********************************************************************
semantics: combineMultiplyValues ( list1 ; list2 )
list1 and list2 should be numeric values only
you may change the binary operator "*" with "/" or "-" or "+" or "^"
(these are the ones i tried; yet, i believe it may be further modified)
example:
ListA = "2¶3¶4¶5¶6", ListB = "6¶5¶4¶3¶2",
the operator = "*", the result = 12¶15¶16¶15¶12
this CF is derived from Jonathan Stark's "combineValues" 
(see at: http://www.briandunning.com/cf/244)
**********************************************************************/

If ( 
	( ValueCount ( list1 ) = 0 ) or ( ValueCount ( list2 ) = 0 ); 
	"";
	GetAsNumber ( GetValue( list1 ; 1 ) * GetValue( list2 ; 1 ) ) & ¶ & /*the operator "*" may be changed to suit your needs*/
	combineMultiplyValues ( 
		RightValues ( list1 ; ValueCount ( list1 ) - 1 ); 
		RightValues ( list2 ; ValueCount ( list2 ) - 1 ) 
	) 
)

given two numerical lists, this recursive CF performs a mathematical binary operation between their [same-position] values — for example:

List01 * List02
Val01 * Val01
Val02 * Val02
Val03 * Val03
Val[n] * Val[n]

further, the binary operator may be changed to "/" or "-" or "+" or "^."
for example: given the numeric list1 "2¶3¶4¶5" and list2 "9¶8¶7¶6";
using operator "*" the CF results "18¶24¶28¶30"
using operator "/" the CF results ".222¶.375¶.571¶.833"
using operator "+" the CF results "11¶11¶11¶11"
using operator "-" the CF results "-7¶-5¶-3¶-1" and
using operator "^" the CF results "512¶6561¶16384¶15625"

thanks to Jonathan Stark for writing such elegant CF, and i hope i may've helped the community.

Comments

		Eduardo Lemos, Victoria, Canada /Sao Paulo, Brazil Dec 28, 2015
i tested the cf on all binary operations with lists using 10000 random values generated at textmechanic (http://textmechanic.com/Generate-List-of-Numbers.html); although it took over 20 seconds to handle some operations, the CF performed well.

Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

combineMultiplyValues ( list1 ; list2 )

Comments

Support this website.

Support this website.