Optional named arguments

Michaël Rouges michael.rouges at gmail.com
Fri Aug 23 00:04:50 PDT 2013


Hi all,

Thanks for your answers.

Domenic Denicola sent me an example by email, but I don't understand it all.

I waited for his response, but seemed busy, I turn back to you.

The sample :

http://traceur-compiler.googlecode.com/git/demo/repl.html#function%20postToMailingList%28{%0A%20%20%20%20email%20%3D%20%22es-discuss%40mozilla.org%22%2C%0A%20%20%20%20subject%20%3D%20%22Optional%20named%20arguments%22%2C%0A%20%20%20%20from%20%3D%20%22michael.rouges%40gmail.com%22}%20%3D%20{}%29%20{%0A%20%20console.log%28email%2C%20subject%2C%20from%29%3B%0A}%0A%0ApostToMailingList%28%29%3B%20%2F%2F%20uses%20all%20the%20defaults%0ApostToMailingList%28{}%29%3B%20%2F%2F%20same%0ApostToMailingList%28{%20email%3A%20%22public-script-coord%40w3.org%22%20}%29%3B%20%2F%2F%20overrides%20the%20default%20email

Several points seems obscure:

   - the *=* operator in the option object declaration
   - the role of *= {}* inside the parentheses of the function declaration
   - and the fact that you can decide to have an empty object, despite
   defaults *(line 9)*

Could you enlighten me, please? or advise me of an article on this subject?

Thanks in advance.
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