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Bug 510537 - Implement Array.isArray, easiest ES5 feature evar. r=jorendorff

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This commit is contained in:
Jeff Walden
2009-08-14 03:23:07 -07:00
parent 6c4be60aad
commit f29533a674
1 changed files with 15 additions and 1 deletions
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16
js/src/jsarray.cpp
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@@ -3292,6 +3292,15 @@ array_every(JSContext *cx, uintN argc, jsval *vp)
}
#endif
static JSBool
array_isArray(JSContext *cx, uintN argc, jsval *vp)
{
*vp = BOOLEAN_TO_JSVAL(argc > 0 &&
!JSVAL_IS_PRIMITIVE(vp[2]) &&
OBJ_IS_ARRAY(cx, JSVAL_TO_OBJECT(vp[2])));
return JS_TRUE;
}
static JSPropertySpec array_props[] = {
{js_length_str, -1, JSPROP_SHARED | JSPROP_PERMANENT,
array_length_getter, array_length_setter},
@@ -3343,6 +3352,11 @@ static JSFunctionSpec array_methods[] = {
JS_FS_END
};
static JSFunctionSpec array_static_methods[] = {
JS_FN("isArray", array_isArray, 1,0),
JS_FS_END
};
JSBool
js_Array(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
{
@@ -3433,7 +3447,7 @@ js_InitArrayClass(JSContext *cx, JSObject *obj)
js_SlowArrayObjectOps.call = NULL;
proto = JS_InitClass(cx, obj, NULL, &js_ArrayClass, js_Array, 1,
array_props, array_methods, NULL, NULL);
array_props, array_methods, NULL, array_static_methods);
/* Initialize the Array prototype object so it gets a length property. */
if (!proto || !InitArrayObject(cx, proto, 0, NULL))