Case sensitivity

One of the new features in Flash MX 2004 and the new Flash Player 7 is ActionScript case-sensitivity. Case-sensitivity is enforced only if the movie is published for Flash Player 7, and is not related to whether it is ActionScript 1.0 or 2.0.

For example, a Flash MX 2004 movie set to use ActionScript 2.0 and published to Flash Player 6, is not case-sensitive: swfoo and swFOO are the same.

On the other hand, a movie set to use ActionScript 1.0 and published to Flash Player 7 is case-sensitive: swfoo is different from swFOO.

So case-sensitivity is determined by the Flash player setting, not the version of ActionScript used. Thanks to Chafic Kazoun for the tip.

1 thought on “Case sensitivity

  1. There seems to be a bug with Flash Player 7, however. Movies created with MX 6 should be treated by FP7 as case-insensitive, but are not. The same applies to movies created with 04 and published to FP6/AS1.

    Below is an example — if there is something wrong, please let me know. We’ve submitted a bug to MM, but would love to know more about this issue. Thanks!

    This example was created and published from Flash MX Version 6:

    // _global.CountryPK = function() { }
    // either constructor shows the issue
    function CountryPK() {}
    CountryPK.prototype.countryid = “ABC”;

    var cPK = new CountryPK();
    cPK.COUNTRYID = “USA”;

    var text;
    for (var attr in cPK) {
    line = attr+”=”+cPK[attr];
    text += line + “n”;
    }

    out_txt.text = text;
    trace(text);

    when running from Flash Player 6:
    COUNTRYID=USA

    When running from Flash Player 7:
    countryid=USA
    COUNTRYID=USA

    The bug is that the cPK object instance ends up with two attributes having the same value. If case was insensitive, the second should overwrite the first.

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