How to resolve the algorithm Loop over multiple arrays simultaneously step by step in the Visual FoxPro programming language

Published on 12 May 2024 09:40 PM
#Visual foxpro

How to resolve the algorithm Loop over multiple arrays simultaneously step by step in the Visual FoxPro programming language

Table of Contents

Problem Statement

Loop over multiple arrays   (or lists or tuples or whatever they're called in your language)   and display the   i th   element of each. Use your language's   "for each"   loop if it has one, otherwise iterate through the collection in order with some other loop.

For this example, loop over the arrays: to produce the output:

If possible, also describe what happens when the arrays are of different lengths.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Loop over multiple arrays simultaneously step by step in the Visual FoxPro programming language

Source code in the visual programming language

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

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