var str3 = ‘‘‘Multi Line String‘‘‘; print( str3.splitMapJoin( RegExp(r‘^‘, multiLine: true), // Matches the beginning of the line onMatch: (m) => ‘** ${m.group(0)}‘, // Adds asterisk to match onNonMatch: (n) => n // Just return non-matches ) );
/* ** Multi ** Line ** String*/
原文：https://www.cnblogs.com/Answer1215/p/11459347.html