Mid

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Contents 1 Prototype 2 Description 3 Discussion 4 Sample Code

[edit] Prototype

Function Mid(s as String, start as Integer) as Integer
Function Mid(s as String, start as Integer, length as Integer) as Integer

[edit] Description

Mid returns the substring starting at the 1-based character index start. The second form returns the substring starting at start of length length.

[edit] Discussion

Mid uses the string's encoding to parse the string into characters. If the encoding is nil, Mid operates on bytes, like MidB.

Experiment shows that Mid handles out-of-range parameters as follows.

• If length < 1, Mid(s, start, length) returns "".
• If start + length > Len(s) + 1, Mid(s, start, length) returns the same string as Mid(s, start).
• If start < 1, then Mid(s, start, length) returns the same string as Mid(s, 1, start + length - 1)

(REALbasic 2007r5, Mac OS 10.5.1)

[edit] Sample Code

Mid("This is a test", 4) = "s is a test"
Mid("This is a test", 1, 4) = "This"
Mid("This is a test", 11) = "test"