Question

I have two arrays that need to be mapped. In code

var result = "[placeholder2] Hello my name is [placeholder1]";
var placeholder = { "[placeholder1]", "[placeholder2]", "[placeholder3]", "[placeholder4]" };
var placeholderValue = { "placeholderValue3", "placeholderValue2", "placeholderValue3" };

Array.ForEach(placeholder , i => result = result.Replace(i, placeholderValue));

given i, placeholderValue needs to be set in an intelligent way. I can implement a switch statement. The cyclomatic complexity would be unacceptable with 30 elements or so. What is a good pattern, extension method or otherwise means to achieve my goal?

Answer 1

I skipped null checks for simplicity

string result = "[placeholder2] Hello my name is [placeholder1]";
var placeHolders = new Dictionary<string, string>() { 
    { "placeholder1", "placeholderValue1" }, 
    { "placeholder2", "placeholderValue2" } 
};

var newResult =  Regex.Replace(result,@"\[(.+?)\]",m=>placeHolders[m.Groups[1].Value]);