How do arguments objects print?

Allen Wirfs-Brock Allen.Wirfs-Brock at microsoft.com
Sat Feb 28 10:25:19 PST 2009


Here is what I propose for Array.prototype.toString (minus the formatting):

15.4.4.2	Array.prototype.toString ( )
When the toString method is called, the following steps are taken:
1.	Let array be the result of calling ToObject on the this value.
2.	Let func be the result of calling the [[Get]] internal method of array with argument "join".
3.	If IsCallable(func) is false, then let func be the standard built-in method Object.prototype.toString (15.2.4.2).
4.	Return  the result of calling the [[Call]] internal method of func providing array as the this value and an empty arguments list.
NOTE
The toString function is intentionally generic; it does not require that its this value be an Array object. Therefore it can be transferred to other kinds of objects for use as a method. Whether the toString function can be applied successfully to a host object is implementation-dependent.


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