B4J Question [BANano] Strange BANano behaviour

[John Naylor]

B4J 9.8
BANano 7.37


I have a BANano custom view which, amongst other things, displays a text box. The value attribute of the text box contains an integer, default of 0

<input Type="text" id="fname" name="fname" maxlength="2" size="2" style="border:none; text-align:center" value="0">

I get the BANano element with

Dim fn As BANanoElement
fn.Initialize ("#fname")

So far so good. However when I execute the following...

Dim x As Int
x = fn.GetAttr ("value")
x=x+1
fn.SetAttr ("value", x)

the value attribute gets set to "01".

Running the same function again I get "011". Changing the input type to "number" made no difference.

So my int value of x is being treated as a string. Is this a bug or am I thinking wrong about this / missed something in the booklet?

 

[alwaysbusy]

See https://www.b4x.com/android/forum/threads/banano-sum-numbers.142434/#post-902505

There are others like parseInt

 

[Star-Dust]

B4J 9.8
BANano 7.37


I have a BANano custom view which, amongst other things, displays a text box. The value attribute of the text box contains an integer, default of 0

<input Type="text" id="fname" name="fname" maxlength="2" size="2" style="border:none; text-align:center" value="0">

I get the BANano element with

Dim fn As BANanoElement
fn.Initialize ("#fname")

So far so good. However when I execute the following...

Dim x As Int
x = fn.GetAttr ("value")
x=x+1
fn.SetAttr ("value", x)

the value attribute gets set to "01".

Running the same function again I get "011". Changing the input type to "number" made no difference.

So my int value of x is being treated as a string. Is this a bug or am I thinking wrong about this / missed something in the booklet?

It is in the casting problem that in JavaScript it is handled differently. It is not strongly typed so to make sure it is handled as a number use the modification below

Dim x As Int
x = fn.GetAttr ("value") * 1
x=x+1
fn.SetAttr ("value", x)

[BANano] [VuetifyAD3] Small solutions to development hitches (Tricks and tracks)

At the request of several friends, I opened this Thread which explains some problems encountered when developing with Banano and VuetiiFy. Obviously I will propose the solutions that I have experimented, perhaps they will not be the best, but they are those obtainable with the documentation...

www.b4x.com

 

[John Naylor]

See https://www.b4x.com/android/forum/threads/banano-sum-numbers.142434/#post-902505

There are others like parseInt

Awesome thank you @alwaysbusy

 

[John Naylor]

It is in the casting problem that in JavaScript it is handled differently. It is not strongly typed so to make sure it is handled as a number use the modification below

Dim x As Int
x = fn.GetAttr ("value") * 1
x=x+1
fn.SetAttr ("value", x)

Also awesome!