F# Lambda Expressions – How to Serialize and Deserialize

The word "lambda" or "lambda expressions" most often refers to anonymous functions. So in that sense a lambda is a kind of function, but not every function is a lambda (i.e. named functions aren't usually referred to as lambdas). Depending on the language, anonymous functions are often implemented differently than named functions (particularly in languages where anonymous functions are closures and named functions are not), so referring to them with different terms can make sense.

The difference between scheme's lambda keyword and Javascript's function keyword is that the latter can be used to create both anonymous functions and named functions while the former only creates anonymous functions (and you'd use define to create named functions).

The lambda calculus is a minimal programming language/mathematical model of computation, which uses functions as its only "data structure". In the lamdba calculus the lambda-symbol is used to create (anonymous) functions. This is where the usage of the term "lambda" in other languages comes from.

From C++ perspective there is a very informative article, which every developer needs to read at once. It basically lays down the difference in serialization for approached intrusive and non-intrusive.

A practical guide to C++ serialization is another well written source to be aware of. More info from Boost C++ libraries on Serializable Concept.