FWIW, ECMAScript 5 doesn't use the term "composite" to describe types. From the spec:

The ECMAScript language types are Undefined, Null, Boolean, String, Number, and Object.

See section 4.3 and section 8.

The term "primitive" refers specifically to type types Undefined, Null, Boolean, String, and Number, leaving Object as the remaining type.

What about the "Array" composite type considered by Microsoft?
Is it just a built in Object?

(I removed the word "in" somewhere)

Luís Soares
luissoares.com

On Mon, Feb 18, 2013 at 5:27 PM, Rebecca Murphey
notifications@github.comwrote:

FWIW, ECMAScript 5http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdfdoesn't use the term "composite" to describe types. From the spec:

The ECMAScript language types are Undefined, Null, Boolean, String,
Number, and Object.

See section 4.3 http://people.mozilla.org/%7Ejorendorff/es5.html#sec-4.3and section
8 http://people.mozilla.org/%7Ejorendorff/es5.html#sec-8.

The term "primitive" refers specifically to type types Undefined, Null,
Boolean, String, and Number, leaving Object as the remaining type.

—
Reply to this email directly or view it on GitHubhttps://github.com//pull/247#issuecomment-13732866.

Strictly speaking, I don't think ECMA5 considers an Array to be a type -- it's just another kind of object.

This was discussed previously, because the docs also used the term map which is incorrect. Anyway, the only acceptable term is "object", but "plain object" is useful is if you really need the distinction.

@lsoares Like @rmurphey said, in ES5 an Array is just an object. In ES6 they are categorized as "Exotic Objects" due to the special semantics of the numeric index properties and the length property.

ok; thanks for the clarifications :)

anyway... don't forget the sentence:
"Everything else is in JavaScript is considered an Object."
should be:
"Everything else in JavaScript is considered an Object."

@lsoares can you update the PR to have that fix?

The "in" error was fixed in 2d71b5c, so I don't believe there's anything else to do here. Thanks!