PLshufn:
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PLshufn
ExtensionExtension

dynamic scope Pshufn variant

Description

Takes Symbol args for later reference by the Streams, which will read from variables in the Environments of their instantiation. See PLx_suite. A PLshufn stream keeps on choosing permutations for the current list. See PLshuf for keeping one permutation.

Class Methods

.new

Creates a new PLshufn object.

Arguments:

list

Symbol or Pshufn list arg. If a Symbol is passed, list can be assigned to an envir variable later on. This lists's elements can be dynamically replaced by Patterns or Streams.

repeats

Symbol or Pshufn repeats arg. If a Symbol is passed, repeats can be assigned to an envir variable later on. Defaults to inf.

cutItems

Symbol or Boolean or Integer (0 or 1) or a Function returning Boolean or Integer. If a Symbol is passed, cutItems can be assigned to an envir variable later on. Determines if list items, which are Patterns or Streams themselves, will be finished if a replacement occurs during their embedding, or if they will be replaced immediately. The latter is the default behaviour (default value true). For protecting whole lists from immediate replacements see PLn.

envir

Dictionary or one of the Symbols \top, \t (topEnvironment), \current, \c (currentEnvironment). Dictionary to be taken for variable reference. Defaults to \current.

Examples