Android Question Extract Number from alphanumeric string

Kiran Raotole · Jun 5, 2019

My string = "AND051"

How extract number from this string?

like new variable = 051 / 51

Erel · Jun 5, 2019

B4X:

Dim s As String = "AND051"
Dim m As Matcher = Regex.Matcher("\d+", s)
If m.Find Then
   Dim number As Int = m.Match
   Log(number)
End If

emexes · Jun 5, 2019

https://regex101.com/ is good for exploring regular expressions (and for building them, too ;-) eg:

Erel · Jun 6, 2019

Less polished but also useful: https://b4x.com:51041/regex_ws/index.html

emexes · Jun 6, 2019

Erel said:
Less polished but also useful

I like that it provides the code.

trepdas · Feb 4, 2021

Erel said:

B4X:

Dim s As String = "AND051"
Dim m As Matcher = Regex.Matcher("\d+", s)
If m.Find Then
   Dim number As Int = m.Match
   Log(number)
End If

How would I delete the numbers from the strings and keep only the "AND" ?

B4X:

oldstring = "AND051"
newstring = "AND"

Erel · Feb 4, 2021

You should never post questions in old threads.

Quandalle · Feb 4, 2021

In your case, you can also use the replace function

B4X:

    Dim s As String = "AND051"
    Log(Regex.Replace("\D",s,"")) '  replace all non digit char by nothing -> "051"
    Log(Regex.Replace("\d",s,"")) ' replace all digit char by nothing -> "AND"

n

Android Question Extract Number from alphanumeric string

Kiran Raotole

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Erel

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emexes

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Erel

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emexes

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trepdas

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Erel

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Quandalle

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Android Question Extract Number from alphanumeric string

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