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699 B
699 B
swap-name
Instructions
Write a program that takes two words in the first argument and swaps them.
- If the number of arguments is not 2, nothing should be printed.
- If the first argument is not an alphanumeric characters, the program should print
"Error\n"
. - Skip the spaces in the first of the two words.
- Print the result with a new line at the end (
'\n'
).
Usage
$ go run . | cat -e
$ go run . "Hello World" "Hello World" | cat -e
$ go run . "Hello World" | cat -e
World Hello$
$ go run . "He2 $%hello" | cat -e
Error$
$ go run . " Hello World" | cat -e
World Hello$
$ go run . "Hello World " | cat -e
Error$
$ go run . "Hello World Hello" | cat -e
Error$