Menu: Difference between revisions

=={{header|jq}}==

{{works with|jq|1.5}}

This version uses jq 1.5's 'input' builtin to read programmatically from STDIN.

<lang jq>def choice:

def read(prompt; max):

def __read__:

prompt,

( input as $input

| if ($input|type) == "number" and 0 < $input and $input <= max then $input

else __read__

end);

__read__;

if length == 0 then ""

else

. as $in

| ("Enter your choice:\n" +

(reduce range(0; length) as $i (""; . + "\($i + 1): \($in[$i])\n")) ) as $prompt

| read($prompt; length) as $read

| if ($read|type) == "string" then $read

else "Thank you for selecting \($in[$read-1])" end

end ;</lang>

'''Example:'''

<lang jq>["fee fie", "huff and puff", "mirror mirror", "tick tock"] | choice</lang>

<lang sh>

$ jq -n -r -f Menu.jq

Enter your choice:

1: fee fie

2: huff and puff

3: mirror mirror

4: tick tock

5

Enter your choice:

1: fee fie

2: huff and puff

3: mirror mirror

4: tick tock

1

Thank you for selecting fee fie</lang>