Learn to Program with Small Basic

The ContainsIndex() method takes two arguments. The first argument is
the name of the array, and the second argument is the index you’re checking
for. The method returns "True" or "False" depending on whether the
index exists in the array.
Line 6 shows that searching for the index is case insensitive, which is why
the search for the index homer returns "True". Also, searching the score array
for index "1" (as a string) or index 1 (as a number) both returned "True".
If you’re not sure whether an array includes a particular index, you can
use the ContainsIndex() method to find out. This method is especially helpful
if you’re working with very long arrays.
Does It Have a Particular Value?
The Array object also offers a method that checks whether an array contains
a certain value. Run the program in Listing 16-7 to discover how the
ContainsValue() method works.
1 ' ContainsValue.sb
2 age["Homer"] = 18
3 age["Marge"] = 17
4 score[1] = 90
5 ans1 = Array.ContainsValue(age, 18) ' Returns "True"
6 ans2 = Array.ContainsValue(age, 20) ' Returns "False"
7 ans3 = Array.ContainsValue(score, 90) ' Returns "True"
8 TextWindow.WriteLine(ans1 + ", " + ans2 + ", " + ans3)
Listing 16-7: Demonstrating the ContainsValue() method
The ContainsValue() method returns "True" or "False" depending on
whether the value it checks for exists in the array.
Note
Unlike the ContainsIndex() method, the ContainsValue() method is case sensitive.
So it’s best to be consistent with your casing!
Give Me All the Indices
Another useful method of the Array object is GetAllIndices(). This method
returns an array that has all the indices of a given array. The first element
of the returned array has an index of 1. To understand how this method
works, run the program in Listing 16-8.
1 ' GetAllIndices.sb
2 age["Homer"] = 18
3 age["Marge"] = 17
4 names = Array.GetAllIndices(age)
5 TextWindow.WriteLine("Indices of the age array:")
234 Chapter 16