import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.*;
import java.lang.*;
import java.io.*;
 
 
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String regex = "\\['([^']*)'\\]\\h+=\\h+'([^']*)'";
        String string = "someArray1['key1'] = 'value1', someArray2['key2'] = 'value2', ignoreText=ignore, some['key3'] = 'value3', ignoreMe['ignore']=ignore, some['key4'] = 'value4'..";
 
        Pattern pattern = Pattern.compile(regex);
        Matcher matcher = pattern.matcher(string);
 
        while (matcher.find()) {
            System.out.println(matcher.group(1) + "=" + matcher.group(2));
        }
	}
}

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