Difference between revisions of "LazUtils"

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(clarification)
(→‎Overview: LazUtils is NOT part of LCL but a seperate components collection that has no dependency on the LCL)
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== Overview ==
 
== Overview ==
LazUtils is a unit within the LCL (Lazarus Component Library) that provides non-visual utility functions/classes. In other words, they are also suitable for use in command-line, non-GUI applications.
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LazUtils is collection of units that provides non-visual utility functions/classes. In other words, they are also suitable for use in command-line, non-GUI applications.
  
 
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Revision as of 18:14, 29 April 2014

Overview

LazUtils is collection of units that provides non-visual utility functions/classes. In other words, they are also suitable for use in command-line, non-GUI applications.

TDictionaryStringList

This is an unsorted TStringList with a fast lookup feature. Internally it uses a string map container to store the string again. It is then used for InsertItem, Contains, IndexOf and Find methods. The extra container does not reserve excessive memory because the strings are reference-counted and not actually copied.

TDictionaryStringList fully supports all Duplicates property values including dupIgnore and dupError. A normal unsorted TStringList lacks this support for some values of Duplicates.

This class is particularly useful when you need to preserve the order in which strings have been inserted into an unsorted list at the same time as needing the ability to do fast lookups (to check if a string is already listed), when you need to prevent addition of duplicate strings.