C-Level Extensibility > The C-level extensibility API > long JS_GetArrayLength() |
Description
Given a pointer to an array object, gets the number of elements in the array.
Arguments
JSContext *cx, JSObject *obj
cx is the opaque JSContext pointer that was passed to the JavaScript function. |
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obj is a reference to an array object. |
Returns
The number of elements in the array, or -1 upon failure.