Create 193-valid-phone-numbers.sh

Author: everthis

193-valid-phone-numbers.sh

@@ -0,0 +1,10 @@
+# Read from the file file.txt and output all valid phone numbers to stdout.
+awk '/^([0-9]{3}-|\([0-9]{3}\) )[0-9]{3}-[0-9]{4}$/' file.txt
+
+# another
+
+grep -P '^(\(\d{3}\) |\d{3}-)\d{3}-\d{4}$' file.txt
+
+# another
+
+sed -n -r '/^([0-9]{3}-|\([0-9]{3}\) )[0-9]{3}-[0-9]{4}$/p' file.txt