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So if I just pipe the result of InStr to Left, then I get the wrong result. But InStr told me the first character was one, not zero. The issue here is Left is zero-based, because if I want everything from the beginning of the string, I tell Left that I want to skip zero characters. So remembering the offsets has been obnoxious. Var Value As String = Mid(Source, Position + 1)īut if I wanted the key, I would have to do Var Key As String = Left(Source, Position - 1) So if I wanted to get the position of everything after the equals sign in "Key=Value", I would do Var Source As String = "Key=Value" Var Position As Integer = InStr(Source, "=") The most frustrating thing about InStr and Mid have been their use of one-based offsets. This ends up hurting performance pretty significantly. There is no caching going on, and worse, if called without parameter values the statement is still prepared. The bad news with these methods is they always create a new prepared statement. I personally consider that a great thing, but it's a behavior to be aware of when making use of the new methods. These new methods fire exceptions on error though, so be aware.
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This a fantastic addition, and works for the other database classes too. Both will accept the command as a string, and also the parameter values at the same time, so the following is now valid syntax: Var Results As RowSet = DB.SelectSQL( "SELECT * FROM objects WHERE id = ?1 ", 128) So API 2.0 introduces more convenient replacements for SQLExecute and SQLSelect: ExecuteSQL and SelectSQL. Using prepared statements with SQLite in Xojo requires a lot of annoying boilerplate.
XOJO INSTR MAC
This property was deprecated by Xojo in 2013r1, and Classic Mac style absolute paths were deprecated by Apple much before that. One important thing to note is AbsolutePath is fully gone. I wouldn't be surprised if methods such as CopyFileTo, MoveFileTo, and CreateAsFolder get deprecated and replaced in a future version. While that's good for legacy code, it doesn't make a whole ton of sense.
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One perplexing thing about the updated FolderItem is how it handles API 2.0's goal of using more exceptions: it doesn't. FolderItem.Directory is now FolderItem.IsFolder, for example. Though there are some additions and changes.
XOJO INSTR CODE
The new FolderItem, which is not renamed, should work without any code changes. Luckily for everybody except Xojo, later Catalina betas fixed the issues and apps which were compiled with the older FolderItem will continue to work. In this case, Xojo had to rapidly get FolderItem modernized, though that mostly involved just copying Xojo.IO.FolderItem and making some adjustments. Relying on these deprecated APIs is considered technical debt, and technical debt can strangle a project at unexpected times. The first handful of macOS Catalina betas broke a number of things with FSRef which caused a bit of a panic in the Xojo community. FolderItem on macOS no Longer Uses Deprecated APIsĪpple deprecated the FSRef APIs way back in macOS 10.8, but Xojo has been stalling to modernize FolderItem. It absolutely helped find bugs that I believe would not have been caught without spending the effort I did, but it is not something I would recommend without a compelling reason.Īnd now, since this release adds a lot of great stuff, let's get to it. As a beta tester and developer of a medium-sized open source project, I did choose to "solve" every single deprecation warning so I could best test the new API. There is also no need to rewrite existing code using the new changes. Most projects will open and run in 2019r2 without any changes. Xojo 2019r2 has launched with a whole ton of changes and deprecations wrapped under the umbrella label "API 2.0." When I say that certain methods got replaced, I really mean the old version has been deprecated and a replacement introduced.