MetaTrader 5 ‣ MT5 Libraries ‣ CDictionary – library MetaTrader 5
CDictionary - library for MetaTrader 5

CDictionary – library MetaTrader 5

by

An implementation of the dictionary (associative array) data structure in MQL5, based on CArrayObj and CList.

Hash Function

FNV-1a

Usage

Primitives:

CDictionary *dict=new CDictionary();
//setting
dict.Set<string>("costarring","liquid");
dict.Set<double>("liquid",0.1);

//getting - variant 1
string variant1 = dict.Get<string>("costarring");
Print(variant1);

//getting - variant 2
double variant2 = 0;
dict.Get<double>("liquid",variant2);
Print(variant2);

It can also store pointers to objects (but not objects or structures):

dict.Set<CObject*>("object",new CObject());

Collision Handling

  1. Each entry would have its own hash.
  2. If two or more entries share the same hash, entries are compared by key and typename. This makes it possible to store multiple entries with the same key (but different type).
  3. When using Set<T>, if there is already an existing entry with the same key and type, the passed value would be treated as a replacement of an existing entry (not a new one). This also applies to pointers.
Alternative:   MACD Histogram, multi-color [v04] - indicator MetaTrader 5
CDictionary – library MetaTrader 5
📈 ROBOTFX MetaTrader Expert Advisors and Indicators to maximize profits and minimize the risks

Similar MetaTrader Trading Tools:

  • JS-Chaos - expert for MetaTrader 5
    JS-Chaos - EA MetaTrader 5     The author of the idea: JS_Sergey, the mq5 code author: barabashkakvn. The Expert Advisor is based on Bill Williams' strategy.…
  • MQL Plus Enhanced Debugging Support - library for MetaTrader 5
    MQL Plus Enhanced Debugging…     Features Features three domains of functionality. - Debugging, Tracing and Performance measurments - Simple to use "Print any variable" to…
  • MAMACD - expert for MetaTrader 5
    MAMACD - EA MetaTrader 5     Author of the idea:  Yuri, author of the mq5 code: barabashkakvn. Two main iMA (Moving Average, MA) indicators with periods…
  • Dematus - expert for MetaTrader 5
    Dematus - EA MetaTrader 5     Author of the idea: Igor MQL5 code author: barabashkakvn How it works If there is a position, and the price…
  • CDouble & CDoubleVector - library for MetaTrader 5
    CDouble & CDoubleVector -…     A library for common rounding methods used in MQL development, primitive wrapper class for type (double), and vector for CDouble…
  • MetaCOT 2 CFTC ToolBox (Set of Indicators) MT4 - indicator for MetaTrader 4
    MetaCOT 2 CFTC ToolBox (Set of…     Contents GENERAL PROVISIONS Brief description Installing the libraries and indicators Several indicators in one window Exporting CFTC reports to CSV…
  • String Manipulation Functions - library for MetaTrader 5
    String Manipulation Functions -…     A collection of useful string manipulation functions Function Description StringAppendIfMissing() Appends the suffix to the end of the string if…
  • EasyXML - XML Parser - library for MetaTrader 5
    EasyXML - XML Parser - library…     Main purpose and abilities EasyXML is a simple yet powerful XML Parser which can read and parse XML from three…