2.1.17 [ECMA-262/5] Section 15.4.4.9, Array.prototype.shift ()

V0018:

The specification states:

 NOTE The shift 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 shift function can be applied successfully to a host object is implementation-dependent.

IE9 Mode, IE10 Mode, IE11 Mode, and EdgeHTML Mode (All Versions)

The shift method can be applied to a host object; however, some host objects may reject such an application.

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