Am a beginner in perl, i have a list of names of text files('one.txt','two.txt','three.txt') in an array called @files. these files and its contents along with other text files are already in a folder called "old". i want to check whether the file names which i have in the array @files are present in the "old" folder, and if present, i have to copy those files to a newfolder called "new". i have no idea how to do this.