Support functional programming

[zero-plusplus]

Functional programming may be able to solve the issue of fat-arrow functions in v2.

The issue with the fat-arrow function is that it can only process one statement.

One suggestion to solve this issue is to run multiple expressions with commas, as follows.

f := () => (
  a(),
  b(),
  c()
)

However, this method is a bit inconvenient because you cannot use if statements, and if you forget to remove the comma at the end of the expression, an error will occur.

The following is the current solution with reference to functional programming.

; 2.0-beta.1
f := bee.from()
  .pipe(() => a())
  .pipe(() => b())
  .pipe(() => c())
)

If you want to use an if or loop statement, do the following

; 2.0-beta.1
f := bee.from(0)
  .loop(Random(1, 10), (data) => data + 1)
  .if((data) => 5< data, (data) => data, () => bee.null)
%f%() ; => 6, 7, 8, 9, 10 or bee.null

Functional programming can be useful not only for solving fat-arrow function issue, but also for general data processing.