I have a hash containing language codes..

my %validLanguages = (
        "de" => "german",
        "en" => "english",
        "es" => "spanish",
        "fr" => "french",
        "it" => "italian",
        "ja" => "jap",
        "ko" => "korean",
        "ru" => "rus,
        "sv" => "WHATS THIS",
        "zh" => "WHATS THIS",
        "zh_TW" => "WHATS THIS"
        );
[download]

...and I want to build a procedure that checks if a piece of text passed to it as a parameter is made up of only...

• one or more keys from the language hash
• white space
• commas

How easy is this to do? I thought I could just use a regex but then I wanted to call the keys of the hash in it and it all got far to complicated.

This is how far I got :(

# returns any value if it is a valid list e.g...
# "de, en, fr, ja"
# return undef if it is not a valid list e.g...
# "monkish fr, en"
# a valid list will always be in the form...
# language,\slanguage,\slanguage....


sub isItJustAListOfLanguages{

    my %validLanguages = (
              "de" => "german",
              "en" => "english",
              "es" => "spanish",
              "fr" => "french",
              "it" => "italian",
              "ja" => "japanise",
              "ko" => "korean",
              "ru" => "russian",
              "sv" => "WHATS THIS",
              "zh" => "WHATS THIS",
              "zh_TW" => "WHATS THIS"
              );
    $textToTest = $_[0];
}
[download]

Help!

---

In reply to Regex checking text is made up of the keys of a hash. by heezy

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