Problem with Javascript function

[Joerg_Kowalski]

@zahaiak Look at this:

You have to decide whether a variable is of type string or number or else;

the following makes it clear: it works:

doesn't work if "x" is of type "string"

x of type number works:

numbers as string work (there must be an internal conversion to data type "number", I guess)

[zahaiak]

Thanks guys
I think I have to fix the JavaScript function first
I'm not sure if it work or not.

Thanks again

[Joerg_Kowalski]

@zahaiak I don't think so. The JavaScript function looks good (change //Example to /star Example star/). It's more a problem of passing the variables right way coming from inside AppInventor.

[TIMAI2]

Perhaps this script may be a little easier to use?

	function getbase64(name, taxNumber, date, total, vat) {
	var el = [name, taxNumber, date, total, vat];
	var base64 = []; 
	for (var i=0;i<el.length;i++) {
		base64.push(btoa(el[i]));
	}
    return base64.toString();
    }

[Juan_Antonio]

Script of @TIMAI2 in https://jsfiddle.net/

- btoa

- atob

[Edited]

[TIMAI2]

in blocks, seems to work

Double quotes are needed around strings, use number blocks for ...numbers.

window.AppInventor.setWebViewString(getbase64("TimAi2",1234567,"21-12-2021",147.24,14.7));

[zahaiak]

Thanks for your help but it doesn't work with me. Could you please give me your aia file.

[TIMAI2]

Here you are
jsTest.aia (2.4 KB)

[zahaiak]

Thanks,
But what I need is deferent. please look to the pictures.

[TIMAI2]

OK sorry, but hopefully my code will help you to get the syntax for your script working

[Joerg_Kowalski]

@zahaiak this works

testentesten.aia (4.1 KB)

in this example the label above shows the result: in this case "RESULT". Here you have only to adapt it to your app. I have written your function to a textBox that you can also use to test some JS code.

For example, change the return value to taxNumber (can be done in the textBox at runtime) - then you see the result in the label. You'll get taxNumber instead of "RESULT", one proof more that it works.

[Juan_Antonio]

With the idea of @TIMAI2 and this code, we can get closer to what you are looking for.

Borrar_Base64_C.aia (3.7 KB)

[Juan_Antonio]

Another version.

Borrar_Base64_D.aia (4.7 KB)

[zahaiak]

I'm so glad that you help me with this problem. You are done it so perfectly. However, Tags and Value Length should be hex number before covering them to Base 64. Please see the Hex Representation attached.

[Juan_Antonio]

In your example hexadecimal sometimes use lowercase letters: f, d, a, .. and other uppercase: F
that changes the result of the base64

[zahaiak]

You are right they should be lowercase letters. How to make them hexadecimal lowercase letters.

[Juan_Antonio]

Block
Text
upcase/downcase

[zahaiak]

I'm sorry, I confused you. The way the project work is
First is (from Text to bytes)
Second is (from bytes to Hex)
Then (from Hex To base64)
this way will work perfectly.

Thanks again for your help and your your patience

[Juan_Antonio]

Transitive relation

for all a , b , c ∈ X , if a R b and b R c , then a R c .

[zahaiak]

Thanks for everything you done for me. I'm really grateful it.