toSingleLetter method
for use single letter of string example: "Rahul".toSingleLetter() => "R".
Implementation
String toSingleLetter() => "${this.replaceAll(this.substring(1), "")}";
for use single letter of string example: "Rahul".toSingleLetter() => "R".
String toSingleLetter() => "${this.replaceAll(this.substring(1), "")}";