count
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count
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The count function returns the number of values in the object argument {obj}.
If {obj} is a collection object, such as a List, Vector, Structure, Matirx, Dictionary, or
Directory, the count function performs a deep count, i.e., all items in
any imbedded collection objects are also counted. Usage Use the countfunction to determine the total number of items in an object,
including the items in imbedded collection objects. This type of counting is called a
deep count. An alternate type of counting is called a shallow count in which embedded
collection objects are counted as one. An alternate function, the length
function, performs a shallow count.
(count obj) If the target is #void, character, number, symbol, text, string, or Boolean,
the value 1 is returned.
Expression:
Arguments
Name
Type
Description Argument: obj Structure Integer Character Number Symbol Text String Boolean
List Pair Vector Dictionary Directory Matrix
Any Analytic Information Server object
Returns:
If the target is a List, then the number of Pairs in the list is returned.
If the target is a Vector, then the number of items in the vector is returned.
If the target is a Structure, Dictionary, or Directory, then the number of bindings is returned.
If the target is a Matrix, then the number of non-void items is returned.
Here are a number of links to Lambda coding examples which contain this instruction in various use cases.
Here are the links to the data types of the function arguments.
| Structure | Integer | Character | Number |
| Symbol | Text | String | BooleanNumMatrix |
| List | Pair | Vector | Dictionary |
| Directory | Matrix |
Here are also a number of links to functions having arguments with any of these data types.
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Analytic Information Server (AIS)AIS Component Systems
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