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A Tinderbox Reference File : Export Codes : Export Code Types : Boolean Comparison : ^exists( item | attribute)^

^exists( item | attribute)^

Code Type:	Boolean Comparison
Code Scope of Action:	item

^exists( object )^

If the item exists for current note, this condition inside a in ^if(condition)^ block statement is true, where object is parent, child, childLinks, basicLinks, inboundLinks, lastChild, next, previous, nextSibling, and prevSibling.

^exists( attribute )^

This condition is true if the attribute (represented here by attribute) exists for the note, and if it is:

not zero, if the attribute is a number
not empty, if the attribute is a string
not black, if the attribute is a color

... and it is always true if the attribute is a date.

But ^if(^exists(text))^ cannot be used to check if the note has some text content as text is not an attribute. Use ^if(text(this))^ instead.

Up: Boolean Comparison
Previous: ^every( group , attribute[, data] )^	Next: ^isDescendedFrom( item )^

[Last updated: 14 Dec 2009, using v5.0]

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