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# DontCollect Value

Value > Special Data Values > DontCollect Value

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The dontCollect value is used in for loops to signal that the value is not to be collected.

See For Loop for details.

dontCollect is a separate distinguished instance of the Undefined class, and so will fail in the way the undefined value does if used in computations.

Constructor

    dontCollect

EXAMPLES
    -- collect all spheres with radius less than 5
    little_spheres =
    for i in $* collect
    if classOf i == sphere and i.radius < 5 then i else dontCollect

#### See Also

- For Loop

- Special Data Values