- Middle and UNICODE
In french: Milieu
- a substring from a string starting at a specified position.
- part of a buffer starting at a specified position.
In this version, it is not possible to extract part of a buffer.
Remark: The same feature can be obtained with the [] operator.
// Extract characters
Middle("Eponine", 2, 3) // Returns "pon"
Middle("Eponine", 2) // Returns "ponine"
Middle("Eponine", 50) // Returns ""
Middle("Eponine", 2, 50) // Returns "ponine"
// Equivalent to
// MyString is string = Eponine
// MyString = MyString[[2,50]]
MyString is string = "Antananarivo - Madagascar"
Middle(MyString, 10, 7) // Returns "ivo - M"
Extracting a substring from a string Hide the details
<Result> = Middle(<Initial string> , <Start position> [, <Length>])
<Result>: Character string
- Part of <Initial string>.
- Empty string ("") if <Start position> is greater than the length of <Initial string>.
- EOT if <Start position> and/or <Length> are negative. A WLanguage error occurs (non-fatal error). To get more details on the error, use ErrorInfo.
<Initial string>: Character string
Character string containing the substring to extract. This string is not modified.
<Start position>: Integer
Position of the first character to extract.
If <Start position> is null, the extraction starts at the beginning of the string.
<Length>: Optional integer
Number of characters to extract.
If this parameter is not specified or is greater than the number of characters after <Start position>, the string is returned from <Start position>.
Middle and UNICODE
If the string passed as a parameter is an ANSI string, the result will be an ANSI string.
If the string passed as a parameter is a UNICODE string, the result will be a UNICODE string.
Reminder: In UNICODE, each character occupies two bytes of memory. Therefore, the memory footprint of a UNICODE string is twice the number of characters actually contained in the string.
The fist character in the string is at index 1.
Remark: If the result on an ANSI string is assigned to a UNICODE string (and conversely), the conversion will be implicitly performed.
The same feature can be obtained with the [] operator.
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