Re: [ShowIf] if the varieable exists

This WebDNA talk-list message is from

1998

It keeps the original formatting. numero = 20305
interpreted = N
texte = >I understand that normally you would put the [ShowIf] context followed>by the equation.>ex: [ShowIf [wogroup1datarq]=Mustang]Car[/ShowIf]>However, there will not always be an existing variable called>[wogroup1datarq]. Instead, I would like to [ShowIf] if the variable>[wogroup1datarq] exists. How can I do this? [showif [wogroup1datarq]![raw][wogroup1datarq][/raw]]This will showif the variable exists. If you reference a variable inWebCatalog that does not exist, then you just get it right backatcha. i.e. If you say [bob] but there is no variable bob, then it will just return[bob]. Surrounding a variable declaration (i.e. [bob] ) in [raw] tagsreturns it untouched, so then you are checking on the right side of theequation to see if the left side returned an actual value, or wasn't foundto be a variable and just returned the name of the variable back inbrackets. Likewise, if you want to do somethign when the variable doesn'texist: [showif [wogroup1datarq]=[raw][wogroup1datarq][/raw]]Howard Wolosky============Lead Programmer / Webmaster  www.willitwork.comWill It Work presented by Lab 2k -The World's Largest Year 2000  Compliance Seach Engine Associated Messages, from the most recent to the oldest:

Re: [ShowIf] if the varieable exists (Grant Hulbert 1998) Re: [ShowIf] if the varieable exists (Scott Szretter 1998) Re: [ShowIf] if the varieable exists (Howard Wolosky 1998) Re: [ShowIf] if the varieable exists (Howard Wolosky 1998) Re: [ShowIf] if the varieable exists (Howard Wolosky 1998) Re: [ShowIf] if the varieable exists (bob 1998) Re: [ShowIf] if the varieable exists (Howard Wolosky 1998) Re: [ShowIf] if the varieable exists (Christer Olsson 1998) Re: [ShowIf] if the varieable exists (PCS Technical Support 1998) [ShowIf] if the varieable exists (Mike Eberly 1998)

>I understand that normally you would put the [showif] context followed>by the equation.>ex: [ShowIf [wogroup1datarq]=Mustang]Car[/ShowIf]>However, there will not always be an existing variable called>[wogroup1datarq]. Instead, I would like to [showif] if the variable>[wogroup1datarq] exists. How can I do this? [showif [wogroup1datarq]![raw][wogroup1datarq][/raw]]This will showif the variable exists. If you reference a variable inWebCatalog that does not exist, then you just get it right backatcha. i.e. If you say [bob] but there is no variable bob, then it will just return[bob]. Surrounding a variable declaration (i.e. [bob] ) in [raw] tagsreturns it untouched, so then you are checking on the right side of theequation to see if the left side returned an actual value, or wasn't foundto be a variable and just returned the name of the variable back inbrackets. Likewise, if you want to do somethign when the variable doesn'texist: [showif [wogroup1datarq]=[raw][wogroup1datarq][/raw]]Howard Wolosky============Lead Programmer / Webmaster  www.willitwork.comWill It Work presented by Lab 2k -The World's Largest Year 2000  Compliance Seach Engine Howard Wolosky

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