Check if first char of a word is uppercase?

Woinowski

Active Member

Licensed User

Longtime User

• May 5, 2012

• #2

There might be an easier solution, but this should work

B4X:

' s is your string
Dim first as String
first = s.Substring2(0,1)
If first.ToUpperCase = first then
  ' Here we are
end if

 

Upvote 0

U

unba1300

Guest

• May 6, 2012

• #3

Thanks for your very quick reply. Your solution set me in the right direction again.

 

Upvote 0

R

Roger Garstang

Well-Known Member

Licensed User

Longtime User

• May 7, 2012

• #4

Could also get an ASCII/Int value of the first char and do a range compare if English text. May even work without the numeric conversion with something like > "@" and < "[". Be sure to check for length of string/no input so the substring or whatever you use to get the first char doesn't fail.

 

Upvote 0

M

Mahares

Expert

Licensed User

Longtime User

• May 7, 2012

• #5

If you are looking for an alternate, here it is:

B4X:

   txt="Basic4Android"
   If Asc(txt) >= 65 AND  Asc(txt)  <= 90 Then  '65 is A, 90 is Z
      Msgbox(txt & " starts with an upper case letter.","")
   Else
      Msgbox(txt & " starts with a lower case letter or something else.","")
   End If

 

Upvote 0

R

Roger Garstang

Well-Known Member

Licensed User

Longtime User

• May 7, 2012

• #6

Yeah, something like that would work. May have to still check for an empty string. There is also an old trick using 32(The 6th bit) too. If you notice the values are 32 apart, so checking for or toggling that bit determines case. ASCII and bytes were so simple before they tossed in all this Unicode stuff.

 

Upvote 0

Woinowski

Active Member

Licensed User

Longtime User

• May 8, 2012

• #7

Using ASC Value might be problematic

Android (and B4A) use UniCode, as far as I understand it. Restricting that check to ASCII might miss something.

 

Upvote 0