The string being stored to $JS is valid javascript.
len = print('Hello' + ' ' + 'World!' + "\n");
len;
JavaScript programs evaluate to their completion value (the expression
value of the last statement). The `print()` on its own would have the
same result, so the `len` global is unnecessary, but then again, so
are the semicolons and the excessive string concatenation ;)
The same example in js:
function print (m) { console.log(m) ; return m.length }
var JS = 'len = print(\'Hello\' + \' \' + \'World!\' + "\\n");\nlen;'
var res = eval(JS) // or vm.runIn...() in node.js
console.log('result=', res)
On Wed, Mar 14, 2012 at 21:24, Dave Clements
<[email protected]> wrote:
> Yah that's what I thought, they haven't used var, and the line with len; on
> it's own is supposed to return int(13).
>
> I suppose I just wanted to confirm whether this example really was as
> clueless as it seems
>
> On Thursday, 15 March 2012 03:33:02 UTC, Matt wrote:
>>
>> I think the issue here is that it doesn't appear to be valid JavaScript at
>> all. Or at the very least, it's fairly non-sensical (i.e., execute a print
>> statement, which we can only assume is defined for V8Js, store the return
>> value [probably undefined?] to a variable, and then "return" that variable).
>>
>> -Matt
>>
>> On Mar 14, 2012, at 11:35 PM, Matthew Vickers wrote:
>>
>> This seems to be PHP pushing Javascript through V8.
>>
>> $JS is a here doc containing some javascript code.
>>
>> Matt
>>
>> ----- "Dave Clements" wrote:
>> > This is a "Javascript" example from the PHP v8 extension
>>
>> >
>> http://www.php.net/manual/en/v8js.examples.php
>> >
>>
>> >
>> <?php
>> >
>> > $v8 = new V8Js();
>> >
>> > /* basic.js */
>> > $JS = <<< EOT
>> > len = print('Hello' + ' ' + 'World!' + "\\n");
>> > len;
>> > EOT;
>> >
>> > try {
>> > var_dump($v8->executeString($JS, 'basic.js'));
>> > } catch (V8JsException $e) {
>> > var_dump($e);
>> > }
>> >
>> > ?>
>> >
>>
>> >
>>
>> >
>> I know this isn't Node, but I just wanted to check I'm not mad... the $JS
>> variable.. that's not javascript at all is it? Or have I completely
>> misunderstood v8?
>>
>> --
>> > Job Board: http://jobs.nodejs.org/
>> > Posting
>> > guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines
>> > You received this message because you are subscribed to the Google
>> > Groups "nodejs" group.
>> > To post to this group, send email to [email protected]
>> > To unsubscribe from this group, send email to
>> > [email protected]
>> > For more options, visit this group at
>> > http://groups.google.com/group/nodejs?hl=en?hl=en
>> >
>>
>> --
>> Job Board: http://jobs.nodejs.org/
>> Posting
>> guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines
>> You received this message because you are subscribed to the Google
>> Groups "nodejs" group.
>> To post to this group, send email to [email protected]
>> To unsubscribe from this group, send email to
>> [email protected]
>> For more options, visit this group at
>> http://groups.google.com/group/nodejs?hl=en?hl=en
>>
>>
> --
> Job Board: http://jobs.nodejs.org/
> Posting guidelines:
> https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines
> You received this message because you are subscribed to the Google
> Groups "nodejs" group.
> To post to this group, send email to [email protected]
> To unsubscribe from this group, send email to
> [email protected]
> For more options, visit this group at
> http://groups.google.com/group/nodejs?hl=en?hl=en
--
Job Board: http://jobs.nodejs.org/
Posting guidelines:
https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines
You received this message because you are subscribed to the Google
Groups "nodejs" group.
To post to this group, send email to [email protected]
To unsubscribe from this group, send email to
[email protected]
For more options, visit this group at
http://groups.google.com/group/nodejs?hl=en?hl=en
