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Library tableaux

Auxiliary functions for table manipulation

Author:

  • Daniel Miller

Copyright© Same as Nmap--See https://nmap.org/book/man-legal.html

Source: https://svn.nmap.org/nmap/nselib/tableaux.lua

Functions

contains (t, item, array)

Check for the presence of a value in a table

invert (t)

Invert a one-to-one mapping

keys (t)

Returns the keys of a table as an array

shallow_tcopy (t)

Copy one level of a table.

tcopy (t)

Recursively copy a table.



Functions

contains (t, item, array)

Check for the presence of a value in a table

Parameters

  • t: the table to search into
  • item: the searched value
  • array:

Return values:

  1. Boolean true if the item was found, false if not
  2. The index or key where the value was found, or nil
invert (t)

Invert a one-to-one mapping

Parameters

  • t: the table to invert

Return value:

an inverted mapping
keys (t)

Returns the keys of a table as an array

Parameters

  • t: The table

Return value:

A table of keys
shallow_tcopy (t)

Copy one level of a table.

Iterates over the keys of a table and copies their values into a new table. If any values are tables, they are copied by reference only, and modifying the copy will modify the original table value as well.

Parameters

  • t: the table to copy

Return value:

a shallow copy of the table
tcopy (t)

Recursively copy a table.

Uses simple assignment to copy keys and values from a table, recursing into subtables as necessary.

Parameters

  • t: the table to copy

Return value:

a deep copy of the table

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