feat(data-structures): add is_empty getter to map, string and blob.

examples/definitions/.rhai/all_in_one.d.rhai

@@ -3047,6 +3047,9 @@ fn keys(map: Map) -> Array;
 /// Number of elements in the array.
 fn len(array: Array) -> int;
 
+/// Return true if the array is empty.
+fn is_empty(array: Array) -> bool;
+
 /// Return the length of the BLOB.
 ///
 /// # Example
@@ -3060,9 +3063,15 @@ fn len(array: Array) -> int;
 /// ```
 fn len(blob: Blob) -> int;
 
+/// Return true if the blob is empty.
+fn is_empty(blob: Blob) -> bool;
+
 /// Return the number of properties in the object map.
 fn len(map: Map) -> int;
 
+/// Return true if the map is empty.
+fn is_empty(map: Map) -> bool;
+
 /// Return the length of the string, in number of characters.
 ///
 /// # Example
@@ -3074,6 +3083,9 @@ fn len(map: Map) -> int;
 /// ```
 fn len(string: String) -> int;
 
+/// Return true if the string is empty.
+fn is_empty(string: String) -> bool;
+
 /// Return the natural log of the decimal number.
 fn ln(x: Decimal) -> Decimal;
 

examples/definitions/.rhai/definitions/__static__.d.rhai

@@ -2532,6 +2532,9 @@ fn keys(map: Map) -> Array;
 /// Number of elements in the array.
 fn len(array: Array) -> int;
 
+/// Return true if the array is empty.
+fn is_empty(array: Array) -> bool;
+
 /// Return the length of the BLOB.
 ///
 /// # Example
@@ -2545,9 +2548,15 @@ fn len(array: Array) -> int;
 /// ```
 fn len(blob: Blob) -> int;
 
+/// Return true if the blob is empty.
+fn is_empty(blob: Blob) -> bool;
+
 /// Return the number of properties in the object map.
 fn len(map: Map) -> int;
 
+/// Return true if the map is empty.
+fn is_empty(map: Map) -> bool;
+
 /// Return the length of the string, in number of characters.
 ///
 /// # Example
@@ -2559,6 +2568,9 @@ fn len(map: Map) -> int;
 /// ```
 fn len(string: String) -> int;
 
+/// Return true if the string is empty.
+fn is_empty(string: String) -> bool;
+
 /// Return the natural log of the decimal number.
 fn ln(x: Decimal) -> Decimal;