Examples

In this chapter, I’ll try to list some example programs to give you an idea how xoscript works.

Server script

This is how a typical script on server might look:

#!/bin/xo

Server init.

# I prefer a central loader that loads
# webtools.xo and template.xo
Program use: ['app/libs/loader.xo'].

# create a new document
>> web-document := Web-Document new.
>> tpl := Template new: ( 
    File new: ['app/templates/greeting.tpl'], read
).

# cut the message section
>> message := tpl cut: ['message'].

# add a message (will be encoded properly to avoid xss)
message greeting: ['hello world!'].

# paste the element at the designated slot
tpl paste: message at: ['messages'].

# output including http headers
web-document out: tpl.

This would render a HTML document with a hello world message. As you can see, this uses a very strict separation between HTML and presentation logic (using the default template engine), so a template developer can update the template without having to adjust any code.

You can see the result here:

https://xoscript.com/test.xo

FizzBuzz

This is a standard fizzbuzz example:

{ :i
 
    (i = 0) continue.

    (i % 15 = 0) true: {
        Out write: ['FizzBuzz'], stop.
    }, continue.

    (i % 3 = 0) true: {
        Out write: ['Fizz'], stop.
    }, continue.

    (i % 5 = 0) true: {
        Out write: ['Buzz'], stop.
    }, continue.

    Out write: i, stop.
 
} * 101.

Output:

1
2
Fizz
4
Buzz
Fizz
7
8
Fizz
Buzz
11
Fizz
13
14
FizzBuzz
etc...

More examples will follow…