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Ingy döt Net 2023-07-01 11:58:00 -04:00
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Task/Loop-over-multiple-arrays-simultaneously/Visual-FoxPro/loop-over-multiple-arrays-simultaneously.fvp Normal file
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LOCAL i As Integer, n As Integer, c As String
LOCAL ARRAY a1[3], a2[3], a3[4], a[3]
*!* Populate the arrays and store the array lengths in a
a1[1] = "a"
a1[2] = "b"
a1[3] = "c"
a[1] = ALEN(a1)
a2[1] = "A"
a2[2] = "B"
a2[3] = "C"
a[2] = ALEN(a2)
a3[1] = "1"
a3[2] = "2"
a3[3] = "3"
a3[4] = "4"
a[3] = ALEN(a3)
*!* Find the maximum length of the arrays
*!* In this case, 4
n = MAX(a[1], a[2], a[3])
? "Simple Loop"
FOR i = 1 TO n
c = ""
c = c + IIF(i <= a[1], a1[i], "#")
c = c + IIF(i <= a[2], a2[i], "#")
c = c + IIF(i <= a[3], a3[i], "#")
? c
ENDFOR
*!* Solution using a cursor
CREATE CURSOR tmp (c1 C(1), c2 C(1), c3 C(1), c4 C(3))
INSERT INTO tmp (c1, c2, c3) VALUES ("a", "A", "1")
INSERT INTO tmp (c1, c2, c3) VALUES ("b", "B", "2")
INSERT INTO tmp (c1, c2, c3) VALUES ("c", "C", "3")
INSERT INTO tmp (c1, c2, c3) VALUES ("#", "#", "4")
REPLACE c4 WITH c1 + c2 + c3 ALL
? "Solution using a cursor"
LIST OFF FIELDS c4