Parses a log file and uses the `FocusableOnly` option to quickly extract only the critical error entries.

ID: 1081

See: GetMatches 
				
					using uCalcSoftware;

var uc = new uCalc();
var t = new uCalc.Transformer();
var log = "INFO: Task started. ERROR: Connection failed. INFO: Task finished.";
t.Text = log;

// Rules for different log levels. Only errors are focusable.
t.Pattern("INFO: {msg}.").SetFocusable(false);
t.Pattern("ERROR: {msg}.").SetFocusable(true);
t.Find();

Console.WriteLine("All log entries:");
Console.WriteLine(t.GetMatches().Text);
Console.WriteLine("");

Console.WriteLine("Critical errors only:");
// Use the option to filter for only the important entries
var errorMatches = t.GetMatches(MatchesOption.FocusableOnly);
Console.WriteLine(errorMatches.Text);
				
			
All log entries:
INFO: Task started.
ERROR: Connection failed.
INFO: Task finished.

Critical errors only:
ERROR: Connection failed.
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					#include <iostream>
#include "uCalc.h"

using namespace std;
using namespace uCalcSoftware;

int main() {
   uCalc uc;
   uCalc::Transformer t;
   auto log = "INFO: Task started. ERROR: Connection failed. INFO: Task finished.";
   t.Text(log);

   // Rules for different log levels. Only errors are focusable.
   t.Pattern("INFO: {msg}.").SetFocusable(false);
   t.Pattern("ERROR: {msg}.").SetFocusable(true);
   t.Find();

   cout << "All log entries:" << endl;
   cout << t.GetMatches().Text() << endl;
   cout << "" << endl;

   cout << "Critical errors only:" << endl;
   // Use the option to filter for only the important entries
   auto errorMatches = t.GetMatches(MatchesOption::FocusableOnly);
   cout << errorMatches.Text() << endl;
}
				
			
All log entries:
INFO: Task started.
ERROR: Connection failed.
INFO: Task finished.

Critical errors only:
ERROR: Connection failed.
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					Imports System
Imports uCalcSoftware
Public Module Program
   Public Sub Main()
      Dim uc As New uCalc()
      Dim t As New uCalc.Transformer()
      Dim log = "INFO: Task started. ERROR: Connection failed. INFO: Task finished."
      t.Text = log
      
      '// Rules for different log levels. Only errors are focusable.
      t.Pattern("INFO: {msg}.").SetFocusable(false)
      t.Pattern("ERROR: {msg}.").SetFocusable(true)
      t.Find()
      
      Console.WriteLine("All log entries:")
      Console.WriteLine(t.GetMatches().Text)
      Console.WriteLine("")
      
      Console.WriteLine("Critical errors only:")
      '// Use the option to filter for only the important entries
      Dim errorMatches = t.GetMatches(MatchesOption.FocusableOnly)
      Console.WriteLine(errorMatches.Text)
   End Sub
End Module
				
			
All log entries:
INFO: Task started.
ERROR: Connection failed.
INFO: Task finished.

Critical errors only:
ERROR: Connection failed.
Explore 600+ other examples