Re: [ease-dev] Some questions of EASE

[Trig Chen <trigchen@xxxxxxxxx>]

Got response from Nashorn development maillist by Sundararajan Athijegannathan:

 Object.defineProperty function [1], [2] can be make properties non-writable and non-configurable (i.e., can't be written, can't be

deleted or configured to make it writable again etc.)

For example, the following

    Object.defineProperty(this, "quit",   { writable: false,configurable: false })

will make quit function non-writable and non-configurable. You can do the same for all builtin properties of global object just before

evaluating any other code:

(function() {

    var keys = Object.getOwnPropertyNames(this)

    for (var k in keys) {

        Object.defineProperty(this, keys[k],  { writable: false, configurable: false })

    }

})()

quit = 4

print(typeof quit)

print(quit)

Java = "hello"

print(typeof Java)

print(Java)

[1] https://developer.mozilla.org/en-US/docs/Web/_javascript_/Reference/Global_Objects/Object/defineProperty

[2] http://www.ecma-international.org/ecma-262/5.1/#sec-15.2.3.6

Can this be applied in EASE?

Best regards,

Trig

2016-05-09 1:54 GMT+08:00 Christian Pontesegger <christian.pontesegger@xxxxxx>:

Hi,

there is no way we can prevent scripts from redefining existing functions and variables. you might reload a module which will redefine all its functions (and potentially overwrite same variables defined by the user before).
Name conflicts between modules may happen. In some cases they are even wanted. My advice is to use function names that are very specific and therefore unlikely to be overwritten. Programmers then might want to define alias commands that are shorter to type and easier to remember for users.

eg

@WrapToScript(alias="collapse")
public void collapseProjectExplorerTree() {}


Auto completion for the shell and and the JS editor are provided to some extent.

cheers
Christian

On 05/08/2016 06:18 AM, Trig Chen wrote:

Hi all,

I just heard of EASE yesterday. EASE seems the right scripting enviroment I'm looking for.

There are some question I wonder.

1. How to avoid script function to be redefined or overwritten?  

    If user types  "var wrap=1" in mistakes, the wrap function is redefined and can't be reverted.

2. How to avoid the same name conflicts between modules?

3. Does the script input textbox have auto completion?

Best regards,

Trig

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