The document discusses abstraction and how it is used to manage complexity in code. It shows how abstraction layers code into smaller and more readable functions, classes and services. This helps organize complex business requirements and contexts by separating concerns like data access, business logic and presentation layers. While abstraction helps, there are always additional dimensions of complexity to address, so the process of managing complexity is ongoing.

1. - Abstraction Context on Data Behaviour -
self-documented code.

2. - Abstraction Context on Data Behaviour -
self-documented code.

3. Code
def main = {
val sentence = “this is how abstraction work”
var i = 0
foreach( c : sentence) {
if ( c in {a, e, i, o, u}) i++
}
print(i)
}

4. Abstraction on Code
def main = {
val sentence = “this is how abstraction work”
var i = 0
foreach( c : sentence) {
if ( isVowel(c) ) i++
}
print(i)
}
def isVowel(c: Character) = c in {a,e,i,o,u}

5. more Abstraction on Code
def main = {
val sentence = “this is how abstraction work”
print(countVowel(sentence))
}
def isVowel(c: Character) = c in {a,e,i,o,u}
def countVowel(sentence: String) = {
var i = 0
foreach( c : sentence)
if ( c isVowel ) i++
}

6. Improve Readability on Code
def main = {
val sentence = “this is how abstraction work”
print countVowel sentence
}
def isVowel(c: Character) = c in {a,e,i,o,u}
def countVowel(sentence: String) = {
var i = 0
foreach( c : sentence)
if ( c isVowel ) i++
}

7. Abstraction bring us
to “layer out”
the complexity

8. Then…

9. def bigFunction = {
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10. def bigFunction = {
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def smallFunctionA = {
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def smallFunctionB = {
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def smallFunctionC = {
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def smallFunctionD = {
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11. def bigFunction = {
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def smallFunctionA = {
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def smallFunctionB = {
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def smallFunctionC = {
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}
def smallFunctionD = {
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}
Nice & Simple

12. there are more
Complexity…

13. def bigFunction = {
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def bigFunction = {
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def bigFunction = {
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def bigFunction = {
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14. def bigFunction = {
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def bigFunction = {
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def bigFunction = {
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def bigFunction = {
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def smallFunctionA = {
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def smallFunctionB = {
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def smallFunctionC = {
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def smallFunctionD = {
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}
def smallFunctionA = {
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def smallFunctionB = {
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def smallFunctionC = {
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}
def smallFunctionD = {
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def smallFunctionA = {
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def smallFunctionB = {
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def smallFunctionC = {
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}
def smallFunctionD = {
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def smallFunctionA = {
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}
def smallFunctionB = {
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}
def smallFunctionC = {
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}
def smallFunctionD = {
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}

15. def bigFunction = {
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def bigFunction = {
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def bigFunction = {
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def bigFunction = {
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def smallFunctionA = {
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def smallFunctionB = {
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def smallFunctionC = {
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}
def smallFunctionD = {
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}
def smallFunctionA = {
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}
def smallFunctionB = {
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}
def smallFunctionC = {
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}
def smallFunctionD = {
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}
def smallFunctionA = {
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}
def smallFunctionB = {
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}
def smallFunctionC = {
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}
def smallFunctionD = {
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}
def smallFunctionA = {
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}
def smallFunctionB = {
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}
def smallFunctionC = {
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}
def smallFunctionD = {
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}
What the F_CK …

16. - Complexity in the Real World -

17. O-O

18. O-Object riented

19. O-OData Data

20. O-OData Data
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.

21. O-OData Data
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
Controlling the Impact between Data & Functions

22. def smallFunctionA = {
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}
def smallFunctionB = {
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}
def smallFunctionC = {
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}
def smallFunctionD = {
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}
def smallFunctionA = {
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}
def smallFunctionB = {
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}
def smallFunctionC = {
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}
def smallFunctionD = {
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}
def smallFunctionA = {
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}
def smallFunctionB = {
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}
def smallFunctionC = {
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}
def smallFunctionD = {
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}
def smallFunctionA = {
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}
def smallFunctionB = {
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}
def smallFunctionC = {
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}
def smallFunctionD = {
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}

23. def smallFunctionA = {
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}
def smallFunctionB = {
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}
def smallFunctionC = {
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}
def smallFunctionD = {
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}
def smallFunctionA = {
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}
def smallFunctionB = {
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}
def smallFunctionC = {
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}
def smallFunctionD = {
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}
def smallFunctionA = {
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}
def smallFunctionB = {
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}
def smallFunctionC = {
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}
def smallFunctionD = {
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}
def smallFunctionA = {
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}
def smallFunctionB = {
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}
def smallFunctionC = {
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}
def smallFunctionD = {
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}
class DataX {
}
class DataY {
}
class DataZ {
}
def smallFunctionA (x) {
.
}
def smallFunctionB (x) {
.
}
def smallFunctionC (x) {
.
}
def smallFunctionD (y) {
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}
def smallFunctionE (y) {
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}
def smallFunctionF (y) {
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}
def smallFunctionG (z) {
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}
def smallFunctionH (z) {
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}
def smallFunctionI (z) {
.
}

24. def smallFunctionA = {
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}
def smallFunctionB = {
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}
def smallFunctionC = {
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}
def smallFunctionD = {
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}
def smallFunctionA = {
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}
def smallFunctionB = {
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}
def smallFunctionC = {
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}
def smallFunctionD = {
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}
def smallFunctionA = {
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}
def smallFunctionB = {
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}
def smallFunctionC = {
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}
def smallFunctionD = {
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}
def smallFunctionA = {
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}
def smallFunctionB = {
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}
def smallFunctionC = {
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}
def smallFunctionD = {
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}
class DataX {
}
class DataY {
}
class DataZ {
}
def smallFunctionA (x) {
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}
def smallFunctionB (x) {
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}
def smallFunctionC (x) {
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}
def smallFunctionD (y) {
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}
def smallFunctionE (y) {
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}
def smallFunctionF (y) {
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}
def smallFunctionG (z) {
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}
def smallFunctionH (z) {
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}
def smallFunctionI (z) {
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}
Nice & Simple

25. Object-Oriented bring
us more abstraction layer

26. there are still more
Complexity ???

27. - more Complexity in the Real World -

28. O-OData Data
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
Business
Requirement

29. O-OData Data
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
func.
Business
Requirement
Context Context
Context Context
Context Context
Context Context

30. class Bill {
}
def find (id) {
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}
def query(id) {
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}
def toJSON (): {
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}
def toHTML () {
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}
private def errorIfNotFound() {
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}
private def getDBConnections() {
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}

31. class Bill {
}
def find (id) {
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}
def query(id) {
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}
def toJSON (): {
.
}
def toHTML () {
.
}
private def errorIfNotFound() {
.
}
private def getDBConnections() {
.
}
class BillController {
}
def find (id) {
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}
private def errorIfNotFound () {
.
}
Apply
MVC-Pattern
as Context
class BillModel {
}
def query (id) {
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}
private def getDBConnection () {
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}
class BillView {
}
def toJSON () {
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}
def toHTML () {
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}

32. Context
Deep
WidthLength

33. Context
MVC-Pattern
Deep
WidthLength

34. class BillModel {
}
def query (id) {
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}
private def getDBConnection () {
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}
class BillController {
}
def find (id) {
.
}
private def errorIfNotFound () {
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}
class BillView {
}
def toJSON () {
.
}
def toHTML () {
.
}
View Controller Model

35. class BillModel {
}
def query (id) {
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}
private def getDBConnection () {
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}
class BillController {
}
def find (id) {
.
}
private def errorIfNotFound () {
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}
class BillView {
}
def toJSON () {
.
}
def toHTML () {
.
}
View Controller Model
persist
transform
biz logic
exception
handling
present
MVC Enough?

36. View Controller Model
persist
transform
biz logic
exception
handling
present
View Controller UseCase Persist
persistbiz logicexception
handling
present
View
Model
transform
Model
transform
Entity
Model
transform
rearrange
Processing-Layer

37. Deep
Width
Context
Length
MVC-Pattern
BaseController, BaseModel, BaseView

38. View
Controlle
r
UseCase Persist
persistbiz logicexception
handling
present
View
Model
transform
Model
transform
Entity
Model
transform
- BaseView
- BaseController
- BaseUseCase
- BasePersist

39. Context
MVC-Pattern
BaseController, BaseModel, BaseView
Bill => BillAction & BillRetrieval
Deep
WidthLength

40. BillUseCase
find()
listOverdue()
listByDate()
listBySender()
listBy…()
create()
confirmPayment()
reject()
payByPromptPay()
payByOmi()
payBy2C()
BillRetrievalUseCase
find()
listOverdue()
listByDate()
listBySender()
listBy…()
BillActionUseCase
create()
confirmPayment()
reject()
payByPromptPay()
payByOmi()
payBy2C()

41. “It’s about bringing order to Complexity”
Jony Ive on Simplicity.

42. Class
functions
Code Structure
functions
Microservices
Level of
Abstraction Context
foreach
Data Behaviour

43. - There is about the “Dimension” -