is it possible to parse in a user entered string, say from a text area, and then incorporate it into a dart function which you can then run, without having to post it back to the server? I guess I'm looking for a dart eval equivalent.
There is no notion of eval in Dart, and it is not possible to dynamically build code. You can run code in a different isolate using spawnUri (see http://api.dartlang.org/docs/releases/latest/dart_isolate.html). When not running in the Dartium browser, note that the Dart code needs to be compiled to JavaScript using dart2js. The site http://try.dartlang.org/ does all that.
Some time in the future Dart might get mirror builders which can be used for "programs to extend and modify themselves" (citation from last paragraph in https://www.dartlang.org/articles/reflection-with-mirrors/).
Related
I try to use JavaScript library visjs.org in Dart. I prepared ‘adapter’ code according examples on Dart site pub.dartlang.org/packages/js and github.com/google/chartjs.dart/blob/master/lib/chartjs.dart.
Also according basic use case example from http://visjs.org I prepare client dart code.
While code compiles without any errors and warnings nothing happens in browser, expected to see graph-tree.
What I did wrong or miss to do?
https://gist.github.com/EdSv/e274a4d12ad3491c383fb4fe76ee671e
The attribute #anonymous is meant to be used when the object you're describing doesn't actually exist in the JS library you're binding, and is only used as a plain old data object. By adding it to all of your objects, my guess is that dart is never attempting to create anything from the visjs library.
Try removing the #anonymous from your Network class and see if that has an effect. You will likely also need to make these abstract classes as well.
I now know that I can't interact with Dart via the console, but I was hoping that there may be another way to invoke a REPL within Dartium.
Basically, what I would like to be able to do is:
1. Go to a website in Dartium
2. Invoke some sort of Dart REPL
3. Mess about with the DOM, CSS etc., using Dart commands, rather than Javascript.
Is this possible at all? Or, is the Dart development model all Edit/Refresh?
Cheers
Andy
Chrome Dev tools in Dartium will now let you do this very nicely.
Dart edit model is Edit/Refresh.
Maybe you are looking for something like http://try.dartlang.org/
In Grails 1.3.7, the console plugin has any autocomplete feature?
This would be particularly interesting to people learning the language as it allows for the exploration of methods injected at runtime.
While the console does not have an autocomplete feature, one thing you can do in the console to explore native and injected methods is use the Inspect * methods from the Script menu.
My personal favorite is Inspect Last. You'd use it like this:
Create a simple program, with a trailing object:
def foo = ""
Run this program (CTRL+R or CMD+R)
Choose Script > Inspect Last
It looks like this:
The reason that GroovyConsole doesn't have code completion is that while you are typing, those commands have not been run. Therefore, there is no practical way to determine the methods on the object at that moment. Even full-blown IDEs like IntelliJ are limited in the kinds of code completion they can offer.
I am using someone else's library that provides its own scripting host instance, it appears.
This lib provides me with functions to define the type of scripting language such as "jscript" and "vbscript", and I can supply it with script code and have that executed, with passing arguments in and back. So, basically, it works.
However, when I try to access the "WScript" object, I get an exception saying that this keyword is undefined.
The developer, not knowing much about this either (he only made this lib for me because I do not want to deal with Windows SDKs right now), told me that he is using "IScriptControl" for this.
Oh, and the lib also provides flags to allow "only safe subset" and "allow UI", which I set to false and true, respectively.
Does that ring a bell with anyone? Do a user of IScriptControl have to take extra steps in order to make a WScript object available? Or, can he use IScriptControl in a way that this is supplied automatically, just as when running the same script from wscript.exe?
Basically, all I need is the WScript.CreateObject function in order to access another app's API via COM.
I don't know why WScript is not known, but I suspect it is because the script host doesn't provide it. Maybe only wscript.exe does this.
If you are using Javascript, to create an object you can use new ActiveXObject(). If you are using VBScript, you can just use CreateObject.
See this article for some background.
I want to insert some script into every page, which have some functions that will be called by the modified HTML of that page, using a Firefox extension. I am able to insert the JavaScript into the head of the HTML, and also modify the page, but the java script functions are not called by the onmouseover event.
Does someone has any pointer on how to do that, using java script in local extension or as a online resource.
No GreaseMonkey, I need to do it with my plugin and not ask user to install greasemonkey, my plugin and the scripts.
Greasemonkey does this. It's excellent!
Make a Greasemonkey script. See Userscripts.org for lots of example ones to work off.
Why not use Greasemonkey? It allows you to execute javascript on any page on Firefox, and if executing the code you enter isn't good enough you could dynamically add links to the head, too.
you can modify the DOM using Firebug. I am not sure if you can load files locally.. sounds malicious. Also, you can just run arbitrary javascript commands in the Firebug console (a la python/ruby console)
There are some Greasemonkey-to-extension "compilers" (or extension-wrappers) out there:
Arantius's GM compiler
Gina Trapani's multiple-GM-script compiler
I've used the first one with extensive internal tweaking over time. However, I don't believe the compiler is actively maintained (default max-version is only 3.0), so may not be up-to-date with the latest GreaseMonkey, or FireFox.
I think Gina Trapani's is more designed for multiple scripts targetting the same domain, but I haven't used it.
Neither of these is a "GreaseMonkey solution" per se, as the end-user never has to install GreaseMonkey. They get a real-live FireFox extension. The core is very similar to GM, but you can change or add as much as you like.