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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