Operator [] (String Index)
Returns a reference to a character in a string
Declare Operator [] ( ByRef lhs As String, ByRef rhs As Integer ) As UByte
Declare Operator [] ( ByRef lhs As ZString, ByRef rhs As Integer ) As UByte
Declare Operator [] ( ByRef lhs As WString, ByRef rhs As Integer ) As T
Note that Operator {} (String index) returns a reference. See [CompilerFAQ Compiler FAQ]].
result = lhs [ rhs ]
lhs
This operator returns a reference to a specific character in a string:
Will print
Syntax
Declare Operator [] ( ByRef lhs As String, ByRef rhs As Integer ) As UByte
Declare Operator [] ( ByRef lhs As ZString, ByRef rhs As Integer ) As UByte
Declare Operator [] ( ByRef lhs As WString, ByRef rhs As Integer ) As T
Note that Operator {} (String index) returns a reference. See [CompilerFAQ Compiler FAQ]].
Usage
result = lhs [ rhs ]
Parameters
lhs
The string.
rhsA zero-based offset from the first character.
TThe wide-character type (varies per platform).
Description
This operator returns a reference to a specific character in a string:
- This operator must not be used in case of empty string because reference is undefined (inducing runtime error).
- Otherwise, the user must ensure that the index does not exceed the range "[0, Len(lhs) - 1]". Outside this range, results are undefined.
Example
Dim a As String = "Hello, world!"
Dim i As Integer
For i = 0 To Len(a) - 1
Print Chr(a[i]);
Next i
Print
Dim i As Integer
For i = 0 To Len(a) - 1
Print Chr(a[i]);
Next i
Will print
Hello, world!
Differences from QB
- New to FreeBASIC
See also
