Mid (Function)
Returns a substring of a string
Declare Function Mid ( ByRef str as Const String, ByVal start as integer ) as String
Declare Function Mid ( ByVal str as Const WString Ptr, ByVal start as integer ) as WString
Declare Function Mid ( ByRef str as Const String, ByVal start as integer, ByVal n as integer ) as String
Declare Function Mid ( ByVal str as Const WString Ptr, ByVal start as integer, ByVal n as integer ) as WString
result = Mid[$]( str, start [, n ] )
str
Returns a substring starting from start in str. If str is empty then the null string ("") is returned. If start <= 0 then the null string ("") is returned.
In the first form of Mid, all of the remaining characters are returned. In the second form, if n < 0 or n >= len(str) then all of the remaining characters are returned.
will produce the output:
Wiki: code rendered this way to allow display of the Unicode characters.
Syntax
Declare Function Mid ( ByRef str as Const String, ByVal start as integer ) as String
Declare Function Mid ( ByVal str as Const WString Ptr, ByVal start as integer ) as WString
Declare Function Mid ( ByRef str as Const String, ByVal start as integer, ByVal n as integer ) as String
Declare Function Mid ( ByVal str as Const WString Ptr, ByVal start as integer, ByVal n as integer ) as WString
Usage
result = Mid[$]( str, start [, n ] )
Parameters
str
The source string.
startThe start position in str of the substring.
nThe substring length, in characters.
Description
Returns a substring starting from start in str. If str is empty then the null string ("") is returned. If start <= 0 then the null string ("") is returned.
In the first form of Mid, all of the remaining characters are returned. In the second form, if n < 0 or n >= len(str) then all of the remaining characters are returned.
Example
Print Mid("abcdefg", 3, 2)
Print Mid("abcdefg", 3)
Print Mid("abcdefg", 2, 1)
Print Mid("abcdefg", 3)
Print Mid("abcdefg", 2, 1)
will produce the output:
cd cdefg bA Unicode example:
Wiki: code rendered this way to allow display of the Unicode characters.
| dim text as wstring * 20 text = "Привет, мир!" print mid(text, 6, 4) ' displays "т, м" |
