Android Question Problem Doing an "Split" with StringFunctions library

[jlucabe]

Good Morning


I have founded an bug in the method Split of the library StringFunctions found in your forum.

This bug consist on this:

When you use the Function Split to Split Strings and use this carachter
( "|" ) (ASCII 124), as a the character for separating one string into its sub-strings, the method works splitting the string into individual characters. instead of sub-strings.

NOTE: I've seen this thread:
http://www.b4x.com/android/forum/threads/stringfunctions-problem.29298/
but I think that It insn't exactly the same situation.


Thank you, Regards.

 

[Erel]

I'm not familiar with the implementation of StringFunctions. However if it is based on Regex.Split then the separator is a regular expressions string. This means that you need to escape the pipe character:

"\|"

 

[jlucabe]

Hello again.

I've making examples using the "\|" character as the separator, and all the sub-strings generated are finished by the backslash character.

This is mi code used for testing your solution:


'+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Sub Globals
'These global variables will be redeclared each time the activity is created.
'These variables can only be accessed from this module.
Dim strSource = "-1.4985018\|52.4053273\|1983688820\|node"
Dim strDivisor = "\|"
Dim result As List

Dim sf As StringFunctions


End Sub

Sub Activity_Create(FirstTime As Boolean)
'Do not forget to load the layout file created with the visual designer. For example:
'Activity.LoadLayout("Layout1")
result.Initialize

result = sf.Split(strSource, strDivisor)

Log (result)

End Sub

'+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

In the Output in the log Window of B4A I obtain this:


** Activity (main) Create, isFirst = true **


(ArrayList) [-1.4985018\, 52.4053273\, 1983688820\, node]


** Activity (main) Resume **


As you can see, the sub-strings are followed by the BackSlash Character "\"


Then, the methods Split and Split2 (I've tried with both because both are in the StringFunctions Library) have a bug because the sub-strings should be Splitted without the separator.


Thank you. Regards

 

[margret]

What happens if you use the pipe character without the backslash. What do the logs show then?

 

[DonManfred]

Log (result)

(ArrayList) [, -, 1, ., 4, 9, 8, 5, 0, 1, 8, ,, 5, 2, ., 4, 0, 5, 3, 2, 7, 3, ,, 1, 9, 8, 3, 6, 8, 8, 8, 2, 0, ,, n, o, d, e]

 

[margret]

I'll look at this code to see what I can find. Does it work using a more common delimiter?

 

[DonManfred]

I'll look at this code to see what I can find. Does itwork using a more common delimiter?

Dim strSource As String = "-1.4985018,52.4053273,1983688820,node"
Dim strDivisor = ","
result.Initialize
result = sf.Split(strSource, strDivisor)
Log (result)

works as expected

(ArrayList) [-1.4985018, 52.4053273, 1983688820, node]

 

[margret]

Yes, you can use "/" or "," but not "\" or "|". I am calling a core function and it performs the same way, so this is past what I can change, sorry.

 

[DonManfred]

I´m not @jlucabe - the thread opener - but i will thank you for your answer. I must burn that into my brain cause i dont want to run into this trap ;-)

 

[stevel05]

Have you tried "\\|" see here

 

[derez]

jlucable,
The function is OK, you are doing it wrong. Don't use

Dim strSource = "-1.4985018\|52.4053273\|1983688820\|node"

it should be
Dim strSource = "-1.4985018|52.4053273|1983688820|node"
And the split is with this: "\|"
If the source is like quoted then you need the split string like stevel05 suggested.

 

[margret]

@derez

Thank You !! Derez's answer is confirmed and works fine.

 

[jlucabe]

Thank you for your posts @Erel @margret @DonManfred @stevel05 @derez

You´ve all helped me to ubderstand the use of this function in this library.

Thank you so much. My best regards.

 

[pauleffect]

goddamn it, i was loosing my mind over this. should have known something was up with the |.
funny thing is, i tried ** at first and it also went berserk. (reworked the code since, so ... i can't vouch for this.)