Android Question How to create a code like this?

Eme Fibonacci · Mar 29, 2017

Is it possible to create a code in B4X that does something like this?

B4X:

Dim sb As StringBuilder
sb.Initialize
   
sb.Append("A").Append("B").Append("C)" ... ... ...

(Infinite times)

What is this called in programming?

DonManfred · Mar 29, 2017

Eme Fibonacci said:
What is this called in programming?

Do you mean the builderpattern? If yes. I dont know if it is possible with b4a.
It is possible with java and probably inline java

Eme Fibonacci · Mar 29, 2017

I do not know the name.
This is really cool.

For example.

B4X:

'Pseudo code

Dim AddTool1 As AddTool
AddTool1.initialize

AddTool1.AddThis(10).AddThis(20).addThis(50)

Log(AddTool1.Total)

//80

I tried some ways to create something lwith B4X but it did not work.

Erel · Mar 29, 2017

B4X:

Public Sub AddThis(i As Int) As AddTool
 ...
 Return Me
End Sub

corwin42 · Mar 29, 2017

Add a class with this code:

B4X:

Sub Class_Globals
    Private mValue As Int
End Sub

'Initializes the object. You can add parameters to this method if needed.
Public Sub Initialize
    mValue = 0
End Sub

Public Sub AddThis(Value As Int) As AddTool
    mValue = mValue + Value
    Return Me
End Sub

Public Sub Total As Int
    Return mValue
End Sub

Edit: It is hard to give an answer faster than Erel.

Erel · Mar 29, 2017

corwin42 said:
It is hard to give an answer faster than Erel.

But your answer is more complete

Eme Fibonacci · Mar 30, 2017

corwin42 said:

Add a class with this code:

B4X:

Sub Class_Globals
    Private mValue As Int
End Sub

'Initializes the object. You can add parameters to this method if needed.
Public Sub Initialize
    mValue = 0
End Sub

Public Sub AddThis(Value As Int) As AddTool
    mValue = mValue + Value
    Return Me
End Sub

Public Sub Total As Int
    Return mValue
End Sub

Edit: It is hard to give an answer faster than Erel.

Perfect.

Of course, this is not have practical effect but I'm was glad to know that it's possible to do this with b4x.

Android Question How to create a code like this?

Eme Fibonacci

Well-Known Member

DonManfred

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Eme Fibonacci

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Erel

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corwin42

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Erel

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Eme Fibonacci

Well-Known Member

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