[T-SQL] Restore database trough mdf file only , ldf missing

One of my friend just call me and told that he has an mdf file but no ldf file , so if want to restore db then what to do , i searched over internet and found two fastest methods for it

USE [master]
GO
-- Method 1: I use this method
EXEC sp_attach_single_file_db @dbname='TestDb',
@physname=N'C:\Program Files\Microsoft SQL Server\MSSQL10.MSSQLSERVER\MSSQL\DATA\TestDb.mdf'
GO
-- Method 2:
CREATE DATABASE TestDb ON
(FILENAME = N'C:\Program Files\Microsoft SQL Server\MSSQL10.MSSQLSERVER\MSSQL\DATA\TestDb.mdf')
FOR ATTACH_REBUILD_LOG
GO