Rust, Design Patterns, Matrix Factorization, Numerical Methods, Software Engineering.
MyStruct { variable_1: Type_1, variable_2: Type_2 } struct MyStructBuilder { variable_1: Option<Type_1>, variable_2: Option<Type_2> } enum MyStructDefinitionError { VariableOneIsIllDefined, VariableTwoIsIllDefined, } impl MyStructBuilder { fn new() -> Self { MyStructBuilder{ variable_1: None,