Re: proper way to check if a container is empty?

This WebDNA talk-list message is from

2000

It keeps the original formatting. numero = 27134
interpreted = N
texte = I think this is clearer: [showif [NIS]=] Easier to see the blank.ml> >The best way is to do this:> >> >[showif [URL][NIS][/URL]=%5BNIS%5D]> > [math show=f]NIS=0[/math]> >[/showif]> >> >in general, because if it's possible that a variable may have user input,> >they may be putting in characters that are comparison operators (like> ><,>,=,!) that could mess up statement. This would resolve those problems.>>In general this is true, but you can take advantage of the >left-to-right parsing of the [ShowIf] context this way:>>[ShowIf =[NIS]]>>(Notice there's only one space after the ShowIf) this reads as show >if 'nothing' equals the value of the [NIS] variable>>Now I should also point out that this is very different from checking >if a variable is undefined. It's one thing to say that a variable >has been defined, and it has a value of , the empty string. It's >another thing entirely to say that a variable has not been defined at >all, and it has no value whatsoever.>>Technical Support **********************************>Smith Micro, Internet Solutions Div | Formerly, Pacific Coast Software>16855 West Bernardo Drive | ------------------------->Suite 380 | eCommerce (WebCatalog)>San Diego, CA 92127 | Software & Site Development>858.675.1106 | http://www.smithmicro.com>858.675.0372 (fax) **********************************>>------------------------------------------------------------->Brought to you by CommuniGate Pro - The Buzz Word Compliant Messaging Server.>To end your Mail problems go to .>>This message is sent to you because you are subscribed to> the mailing list .>To unsubscribe, E-mail to: >To switch to the DIGEST mode, E-mail to \|/ (. .)_________________________ooO_(_)_Ooo_____________________________Mark Lacas mailto:mark@lacas.comVirtual Loft / Seattle HarborCam: http://www.loftcam.com/SeattleStuff WebCommerce Community: http://www.seattlestuff.com/-------------------------------------------------------------Brought to you by CommuniGate Pro - The Buzz Word Compliant Messaging Server.To end your Mail problems go to .This message is sent to you because you are subscribed to the mailing list .To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Associated Messages, from the most recent to the oldest:

Re: proper way to check if a container is empty? (Kenneth Grome 2000)
Re: proper way to check if a container is empty? (Webcat 2000)
Re: proper way to check if a container is empty? (WebDNA Support 2000)
Re: proper way to check if a container is empty? (John Butler 2000)
Re: proper way to check if a container is empty? (Howard Wolosky 2000)
Re: proper way to check if a container is empty? (Paul Fowler 2000)
proper way to check if a container is empty? (John Butler 2000)

I think this is clearer: [showif [NIS]=] Easier to see the blank.ml> >The best way is to do this:> >> >[showif [url][NIS][/URL]=%5BNIS%5D]> > [math show=f]NIS=0[/math]> >[/showif]> >> >in general, because if it's possible that a variable may have user input,> >they may be putting in characters that are comparison operators (like> ><,>,=,!) that could mess up statement. This would resolve those problems.>>In general this is true, but you can take advantage of the >left-to-right parsing of the [showif] context this way:>>[ShowIf =[NIS]]>>(Notice there's only one space after the ShowIf) this reads as show >if 'nothing' equals the value of the [NIS] variable>>Now I should also point out that this is very different from checking >if a variable is undefined. It's one thing to say that a variable >has been defined, and it has a value of , the empty string. It's >another thing entirely to say that a variable has not been defined at >all, and it has no value whatsoever.>>Technical Support **********************************>Smith Micro, Internet Solutions Div | Formerly, Pacific Coast Software>16855 West Bernardo Drive | ------------------------->Suite 380 | eCommerce (WebCatalog)>San Diego, CA 92127 | Software & Site Development>858.675.1106 | http://www.smithmicro.com>858.675.0372 (fax) **********************************>>------------------------------------------------------------->Brought to you by CommuniGate Pro - The Buzz Word Compliant Messaging Server.>To end your Mail problems go to .>>This message is sent to you because you are subscribed to> the mailing list .>To unsubscribe, E-mail to: >To switch to the DIGEST mode, E-mail to \|/ (. .)_________________________ooO_(_)_Ooo_____________________________Mark Lacas mailto:mark@lacas.comVirtual Loft / Seattle HarborCam: http://www.loftcam.com/SeattleStuff WebCommerce Community: http://www.seattlestuff.com/-------------------------------------------------------------Brought to you by CommuniGate Pro - The Buzz Word Compliant Messaging Server.To end your Mail problems go to .This message is sent to you because you are subscribed to the mailing list .To unsubscribe, E-mail to: To switch to the DIGEST mode, E-mail to Webcat

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Re: proper way to check if a container is empty?

2000

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