| JS_LookupUCProperty |
Function |
|
Summary
Determines if a specified, Unicode-encoded property exists.
|
Syntax
JSBool JS_LookupUCProperty(JSContext *cx, JSObject *obj,
const jschar *name, size_t namelen, jsval *vp);
| Name | Type | Description |
|---|
cx | JSContext * | Pointer to a JS context from which to derive runtime information.
|
obj | JSObject * | Object to search on for the property.
|
name | const jschar * | Name of the property to look up.
|
namelen | size_t | Length, in bytes, of name.
|
vp | jsval * | Pointer to a variable into which to store the last retrieved value of the property if it exists. If not, vp is set to JSVAL_VOID.
|
|
Description
JS_LookupUCProperty examines a specified JS object, obj, for a Unicode-encoded property named name. namelen indicates the size, in bytes, of name. If the property exists, vp is set either to the last retrieved value of the property if it exists, or to JSVAL_VOID if it does not, and JS_LookupProperty returns JS_TRUE. On error, such as running out of memory during the search, JS_LookupProperty returns JS_FALSE, and vp is undefined.
|
Notes
JS_LookupUCProperty does not distunguish between a property with a value of undefined and a property that does not exist.
|
See Also
|