webMathematica`

MSPValue

MSPValue[var]

returns the value of var; it returns a null string if var has no value

MSPValue[var, def]

returns the value of var; it returns def if var has no value

Details

  • MSPValue is a utility function that is useful for extracting the value of variables.
  • The following exceptions can be thrown by MSPValue.
  • MSPException["ValueError"]if the value is not a string, this indicates a programmatic error by the page author
    MSPException["VariableError"]if the variable is not a Mathematica symbol, this indicates a programmatic error by the page author

Examples

Basic Examples  (1)

You can simulate how the function works by installing and loading the package.

The value of the variable $$expr is returned.

If $$expr has no value, then a null string is returned.

Here a default value is returned.