Writing multi-valued if statements in programs: Exploring alternatives
In programming, executing conditional statements based on multiple possible values can be achieved using a series of OR (||) operators. For example, the following code checks whether the variable value has a value of 1 or 2:
<code>if (value==1 || value==2)</code>
However, this approach can become unwieldy when dealing with large numbers of values. To simplify this situation, let's explore alternative ways of matching multiple values in an if statement:
1. Use the Contains() method:
A convenient way to handle multiple values is to utilize the Contains() method of an array. By creating an array of values, you can use this method to determine whether a given value is in it:
<code>if (new[] {1, 2}.Contains(value))</code>
2. Custom extension method:
Alternatively, you can create a custom extension method to do this in a more concise and reusable way:
<code>public static bool In<t>(this T obj, params T[] args) { return args.Contains(obj); }</t></code>
With this extension method, you can now use it like this:
<code>if (1.In(1, 2))</code>
These techniques provide a more concise and elegant solution for writing if statements that match multiple values. While the Contains() method is a simple option, custom extension methods provide a more general and reusable approach.
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