Globalization API discussion

David Herman dherman at
Sat Nov 19 22:40:33 PST 2011

On Nov 19, 2011, at 5:50 PM, Brendan Eich wrote:

> On Nov 19, 2011, at 2:20 PM, Rick Waldron wrote:
>> Q. We don't use option parameter like that in JS (see previous point for actual example)
>> Using an object-as-option parameter is a very common API design pattern in real-world JavaScript today - why anyone would say otherwise is confounding. 
> Right. For example, ES5's property descriptor and property descriptor map parameters.

It was me. I didn't say JS doesn't use options objects. I said the G11n library was using them wrong. They were doing:

    if (!ops) {
        ops = { foo: defFoo, bar: defBar, baz: defBaz };

instead of e.g.:

    if (!ops)
        ops = {};
    if (typeof === "undefined") = defFoo;
    if (typeof === "undefined") = defBar;
    if (typeof ops.baz === "undefined")
        ops.baz = defBaz;

IOW, it shouldn't be all or nothing, but rather each property of the options object is separately optional.


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