Method assocEx

src/jvm/clojure/lang/PersistentArrayMap.java:227–245

(Object key, Object val)

}

public IPersistentMap assocEx(Object key, Object val) {
	int i = indexOf(key);
	Object[] newArray;
	if(i >= 0)
		{
		throw Util.runtimeException("Key already present");
		}
	else //didn't have key, grow
		{
		if(array.length >= HASHTABLE_THRESHOLD)
			return createHT(array).assocEx(key, val);
		newArray = new Object[array.length + 2];
		if(array.length > 0)
			System.arraycopy(array, 0, newArray, 2, array.length);
		newArray[0] = key;
		newArray[1] = val;
		}
	return create(newArray);
}

public IPersistentMap assoc(Object key, Object val){
	int i = indexOf(key);