Menu: Difference between revisions

=={{header|Wren}}==

{{libheader|Wren-ioutil}}

<lang ecmascript>import "/ioutil" for Input

var menu = Fn.new { |list|

var n = list.count

if (n == 0 ) return ""

var prompt = "\n M E N U\n\n"

for (i in 0...n) prompt = prompt + "%(i+1). %(list[i])\n"

prompt = prompt + "\nEnter your choice (1 - %(n)): "

var index = Input.integer(prompt, 1, n)

return list[index-1]

}

var list = ["fee fie", "huff and puff", "mirror mirror", "tick tock"]

var choice = menu.call(list)

System.print("\nYou chose : %(choice)")</lang>

{{out}}

Sample run:

<pre>

M E N U

1. fee fie

2. huff and puff

3. mirror mirror

4. tick tock

Enter your choice (1 - 4): 6

Must be an integer between 1 and 4, try again.

M E N U

1. fee fie

2. huff and puff

3. mirror mirror

4. tick tock

Enter your choice (1 - 4): m

Must be an integer between 1 and 4, try again.

M E N U

1. fee fie

2. huff and puff

3. mirror mirror

4. tick tock

Enter your choice (1 - 4): 4

You chose : tick tock

</pre>