I. Magic strings

Don’t lose it, re-use it

There’ll be a point in your programming life where you’ll come across string data types. These are normally defined as double quoted "..." pieces of text, like the examples below.

"foo"
"My message sentence"
"123"
"true"

As you can see, strings can be quite powerful, right? You can wrap the actual text in these, numbers and even boolean types.

The problem called Magic strings arises when you have code written where you check if one value, perhaps assigned in a variable, equals another value, perhaps written in the string.

For example, this small code snippet in isolation doesn’t look too offensive, right?

var coffeeName = "americano";
if (coffeeName == "latte")
{
    return "Good choice with the Latte!";
}

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