Operator Type:
Operator Scope of Action:
Operator Purpose:
Data Type Returned:
Operator First Added:
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Property [other Property type actions]
List [operators of similar scope]
Data manipulation [other Data manipulation operators]
Number [about Number data type]
v7.0.0
Baseline
As at baseline
Syntax note: Operators without any defined mandatory arguments may omit their empty closing parentheses
list.count()
list.count
The property .count counts the Number of discrete items in the specified List- or Set-type list.
This is better used instead of count(list) or list.size.
The subject list is evaluated so can use a literal list or $attribute(note). It can also use more complex expressions to get data as long as the result is an attribute of the List or Set data type.
For example if $DisplayedAttributes for the current note is "Color;AccentColor;NameFont" then the code
$MyNumber = $DisplayedAttributes.count; is effectively
$MyNumber = ("Color;AccentColor;NameFont").count; and not surprisingly returns 3. Note that the count is not all unique values for the attribute across the whole TBX; scope is restricted to 'this' note or another nominated note. Specimen usage:
$MyNumber = $DisplayedAttributes.count; $MyNumber = $DisplayedAttributes("some other note").count; To use .count with a list of items that are attributes or expressions, use list() to pre-create a list:
Works: $MyNumber = list(4+2,9+6).count; (output: 2)
For more complex examples, where list items are action code expressions, it may be necessary to use eval() to wrap each list item expression e.g. list(eval(expressionA),eval(expressionB)).
Examples
The following is a trivial example (given you could use $ChildCount instead) but shows how count can be used in a more subtle way:
$MyNumber = collect(children,$Name).count; The result of collect() is a List, in this case a number of note titles. List.count will return the number of values in the list (including duplicates). To get a de-duped count, chain the .unique function before the .count:
$MyNumber = collect(children,$Name).unique.count; Similarly, find() returns a List but note that find() does not de-dupe for aliases. Thus test $IsAlias in the query to weed alias results from the returned list:
$MyNumber = find($Prototype=="pProject"&$IsAlias==false&$ChildCount>1).count; See also—notes linking to here: