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Start your free trialNick Martini
12,846 PointsWhat is the purpose of the "=>" operator in this code challenge?
Within the SequenceDetector class, the Description property is being assigned an empty string by using the "=>" operator.
I have never seen this used before in this way. I have always seen properties assigned values by simply using the "=" operator instead.
What are the differences in these two assignments?
namespace Treehouse.CodeChallenges
{
class RepeatDetector : SequenceDetector
{
public override bool Scan(int[] sequence)
{
if(sequence.Length < 2)
{
return false;
}
for(int i = 1; i < sequence.Length; ++i)
{
if(sequence[i] == sequence[i-1])
{
return true;
}
}
return false;
}
}
}
namespace Treehouse.CodeChallenges
{
class SequenceDetector
{
public string Description => "";
public virtual bool Scan(int[] sequence)
{
return true;
}
}
}
1 Answer
Steven Parker
231,198 PointsThat's an "expression-bodied member", not an assignment.
An assignment would create a local field variable, but this creates a property with a custom getter. It's essentially equivalent to this:
public string Description
{
get { return ""; }
}
This is one of several new features added to C# 6. If you're not still learning C# for the first time, you might want to take a look at What's New in C# 6.