3 files changed, 68 insertions, 1 deletions

diff --git a/core/variant/array.cpp b/core/variant/array.cpp
index 54cd1eda2f..5d3292d0b9 100644
--- a/core/variant/array.cpp
+++ b/core/variant/array.cpp
@@ -369,6 +369,34 @@ int Array::find(const Variant &p_value, int p_from) const {
 	return ret;
 }
 
+int Array::find_custom(const Callable &p_callable, int p_from) const {
+	int ret = -1;
+
+	if (p_from < 0 || size() == 0) {
+		return ret;
+	}
+
+	const Variant *argptrs[1];
+
+	for (int i = p_from; i < size(); i++) {
+		const Variant &val = _p->array[i];
+		argptrs[0] = &val;
+		Variant res;
+		Callable::CallError ce;
+		p_callable.callp(argptrs, 1, res, ce);
+		if (unlikely(ce.error != Callable::CallError::CALL_OK)) {
+			ERR_FAIL_V_MSG(ret, "Error calling method from 'find_custom': " + Variant::get_callable_error_text(p_callable, argptrs, 1, ce));
+		}
+
+		ERR_FAIL_COND_V_MSG(res.get_type() != Variant::Type::BOOL, ret, "Error on method from 'find_custom': Return type of callable must be boolean.");
+		if (res.operator bool()) {
+			return i;
+		}
+	}
+
+	return ret;
+}
+
 int Array::rfind(const Variant &p_value, int p_from) const {
 	if (_p->array.size() == 0) {
 		return -1;
@@ -394,6 +422,41 @@ int Array::rfind(const Variant &p_value, int p_from) const {
 	return -1;
 }
 
+int Array::rfind_custom(const Callable &p_callable, int p_from) const {
+	if (_p->array.size() == 0) {
+		return -1;
+	}
+
+	if (p_from < 0) {
+		// Relative offset from the end.
+		p_from = _p->array.size() + p_from;
+	}
+	if (p_from < 0 || p_from >= _p->array.size()) {
+		// Limit to array boundaries.
+		p_from = _p->array.size() - 1;
+	}
+
+	const Variant *argptrs[1];
+
+	for (int i = p_from; i >= 0; i--) {
+		const Variant &val = _p->array[i];
+		argptrs[0] = &val;
+		Variant res;
+		Callable::CallError ce;
+		p_callable.callp(argptrs, 1, res, ce);
+		if (unlikely(ce.error != Callable::CallError::CALL_OK)) {
+			ERR_FAIL_V_MSG(-1, "Error calling method from 'rfind_custom': " + Variant::get_callable_error_text(p_callable, argptrs, 1, ce));
+		}
+
+		ERR_FAIL_COND_V_MSG(res.get_type() != Variant::Type::BOOL, -1, "Error on method from 'rfind_custom': Return type of callable must be boolean.");
+		if (res.operator bool()) {
+			return i;
+		}
+	}
+
+	return -1;
+}
+
 int Array::count(const Variant &p_value) const {
 	Variant value = p_value;
 	ERR_FAIL_COND_V(!_p->typed.validate(value, "count"), 0);
@@ -761,7 +824,7 @@ Variant Array::max() const {
 				return Variant(); //not a valid comparison
 			}
 			if (bool(ret)) {
-				//is less
+				//is greater
 				maxval = test;
 			}
 		}
diff --git a/core/variant/array.h b/core/variant/array.h
index 3aa957b312..ec6c078fb8 100644
--- a/core/variant/array.h
+++ b/core/variant/array.h
@@ -152,7 +152,9 @@ public:
 	void reverse();
 
 	int find(const Variant &p_value, int p_from = 0) const;
+	int find_custom(const Callable &p_callable, int p_from = 0) const;
 	int rfind(const Variant &p_value, int p_from = -1) const;
+	int rfind_custom(const Callable &p_callable, int p_from = -1) const;
 	int count(const Variant &p_value) const;
 	bool has(const Variant &p_value) const;
 
diff --git a/core/variant/variant_call.cpp b/core/variant/variant_call.cpp
index 5e402937cf..65eea9115b 100644
--- a/core/variant/variant_call.cpp
+++ b/core/variant/variant_call.cpp
@@ -2289,7 +2289,9 @@ static void _register_variant_builtin_methods_array() {
 	bind_method(Array, back, sarray(), varray());
 	bind_method(Array, pick_random, sarray(), varray());
 	bind_method(Array, find, sarray("what", "from"), varray(0));
+	bind_method(Array, find_custom, sarray("method", "from"), varray(0));
 	bind_method(Array, rfind, sarray("what", "from"), varray(-1));
+	bind_method(Array, rfind_custom, sarray("method", "from"), varray(-1));
 	bind_method(Array, count, sarray("value"), varray());
 	bind_method(Array, has, sarray("value"), varray());
 	bind_method(Array, pop_back, sarray(), varray());