Programming can be like circuits drawing -- a JSON-FP perspective

Apr 17, 2015Download as PPTX, PDF4 likes1,447 views

The simplicity of JSON-FP expressions allows programmers to focus on functional blocks instead of splitting hairs on syntax of programming structure. That simplicity also makes metaprogramming feasible.

Programming Can Be Like Circuits
Drawing
A JSON-FP Perspective
By Ben Lue

JSON-FP
Expression
input output
Everything starts from …

Eventually, it could become
something like this:

Quite amazing, isn’t it?
Now we’ll introduce 3 basic data flow
constructors in JSON-FP:
chaining, if and bucket

JSON-FP
Expression
i JSON-FP
Expression
o/i JSON-FP
Expression
o/i o
Chaining

JSON-FP
Expression
i JSON-FP
Expression
o/i JSON-FP
Expression
o/i o
Chaining
Example
{“->”: [{multiply: 10}, {add: 5}, {divide: 10}]}
f(x) = ((x * 10) + 5) / 10

JSON-FP
Expression
i JSON-FP
Expression
o/i JSON-FP
Expression
o/i o
Chained expressions can be treated like an
single expression
“Fatter” JSON-FP
Expression
input output

$Example var add_5 = {“->”: [{multiply: 10}, {add: 5}, {divide: 10}]}; var rounding = {“->”: [ add_5, {floor: null} ] };$

Summary
? You can pipe (chain) JSON-FP expressions
to achieve the needed functionalities
(higher-order function).
? For readability and reuse purposes, you
can assign chained (or any compounded)
expressions to a variable.

JSON-FP
Expression
true
JSON-FP
Expression
If
JSON-FP
Expression
false

$The syntax { if: [ {predicate}, {expression_for_true}, {expression_for_false} ] }$

JSON-FP
Expression
Bucket
JSON-FP
Predicate
…
JSON-FP
Expression
JSON-FP
Predicate
JSON-FP
Expression
JSON-FP
Predicate
+
Ex: 1, 2, 3, 4, 5, …
1, 4, …
2, 5, …
3, 6, …

Bucket
? Input elements are evaluated against the
bucket predicates (which are JSON-FP
expressions) sequentially.
? If any predicate turns true, the element
belongs to that bucket and no further
checking will be done for that element.

Now can you visualize a JSON-FP
program as something like this:

Each JSON-FP expression takes exact
one input and produces exact one
output.

That makes it easy to connect
expressions.

Actually makes it easy to do
metaprogramming.
You don’t have to worry about syntax
or programming structure. You only
need to choose the right functional
block.

Want to play?
Check out the JSON-FP playground
http://playground.jsonfp.org

Fork me on Github
https://github.com/benlue/jsonfp

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Programming can be like circuits drawing -- a JSON-FP perspective

1. Programming Can Be Like Circuits Drawing A JSON-FP Perspective By Ben Lue

2. JSON-FP Expression input output Everything starts from …

3. Eventually, it could become something like this:

4. Quite amazing, isn’t it? Now we’ll introduce 3 basic data flow constructors in JSON-FP: chaining, if and bucket

5. JSON-FP Expression i JSON-FP Expression o/i JSON-FP Expression o/i o Chaining

6. JSON-FP Expression i JSON-FP Expression o/i JSON-FP Expression o/i o Chaining Example {“->”: [{multiply: 10}, {add: 5}, {divide: 10}]} f(x) = ((x * 10) + 5) / 10

7. JSON-FP Expression i JSON-FP Expression o/i JSON-FP Expression o/i o Chained expressions can be treated like an single expression “Fatter” JSON-FP Expression input output

8. Example var add_5 = {“->”: [{multiply: 10}, {add: 5}, {divide: 10}]}; var rounding = {“->”: [ add_5, {floor: null} ] };

9. Summary ? You can pipe (chain) JSON-FP expressions to achieve the needed functionalities (higher-order function). ? For readability and reuse purposes, you can assign chained (or any compounded) expressions to a variable.

10. JSON-FP Expression true JSON-FP Expression If JSON-FP Expression false

11. The syntax { if: [ {predicate}, {expression_for_true}, {expression_for_false} ] }

12. JSON-FP Expression Bucket JSON-FP Predicate … JSON-FP Expression JSON-FP Predicate JSON-FP Expression JSON-FP Predicate + Ex: 1, 2, 3, 4, 5, … 1, 4, … 2, 5, … 3, 6, …

13. Bucket ? Input elements are evaluated against the bucket predicates (which are JSON-FP expressions) sequentially. ? If any predicate turns true, the element belongs to that bucket and no further checking will be done for that element.

14. Now can you visualize a JSON-FP program as something like this:

15. Each JSON-FP expression takes exact one input and produces exact one output.

16. That makes it easy to connect expressions.

17. Actually makes it easy to do metaprogramming. You don’t have to worry about syntax or programming structure. You only need to choose the right functional block.

18. Want to play? Check out the JSON-FP playground http://playground.jsonfp.org

19. Fork me on Github https://github.com/benlue/jsonfp

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Programming can be like circuits drawing -- a JSON-FP perspective

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Programming can be like circuits drawing -- a JSON-FP perspective