Previous

Next

Review the solution to extract, replace, and remove data from an input string

Completed

The following code is one possible solution for the challenge from the previous unit.

const string input = "<div><h2>Widgets &trade;</h2><span>5000</span></div>";

string quantity = "";
string output = "";

// Your work here

// Extract the "quantity"
const string openSpan = "<span>";
const string closeSpan = "</span>";

int quantityStart = input.IndexOf(openSpan) + openSpan.Length; // + length of <span> so index at end of <span> tag
int quantityEnd= input.IndexOf(closeSpan);
int quantityLength = quantityEnd - quantityStart;
quantity = input.Substring(quantityStart, quantityLength);
quantity = $"Quantity: {quantity}";

// Set output to input, replacing the trademark symbol with the registered trademark symbol
const string tradeSymbol = "&trade;";
const string regSymbol = "&reg;";
output = input.Replace(tradeSymbol, regSymbol);

// Remove the opening <div> tag
const string openDiv = "<div>";
int divStart = output.IndexOf(openDiv);
output = output.Remove(divStart, openDiv.Length);

// Remove the closing </div> tag and add "Output:" to the beginning
const string closeDiv = "</div>";
int divCloseStart = output.IndexOf(closeDiv);
output = "Output: " + output.Remove(divCloseStart, closeDiv.Length);

Console.WriteLine(quantity);
Console.WriteLine(output);

This code is merely "one possible solution." As long as your code produces the following output, you were successful.

Quantity: 5000
Output: <h2>Widgets &reg;</h2><span>5000</span>

If successful, congratulations! Continue on to the knowledge check in the next unit.

Important

If you had trouble completing this challenge, maybe you should review the previous units before you continue on.

Continue