3. Overview Map

A map is a collection that associates a key name with a matrix. The matrix is either a string matrix, a real matrix or a complex matrix. Unlike a Container (see Overview Container) the matrix is not accessed through an index (1,2,3,…) but by a key name like “Engine”, “Test”, etc.

Example

hMap = MapCreate();
MapSetAt(hMap, "Mot-No12", ["1,6l", "4 Valves", "74kW"]);
MapSetAt(hMap, "Mot-No432", ["2.0l", "4 Valves", "100kW"]);
MapSetAt(hMap, "Mot-No42", ["2.5l", "4 Valves", "115kW"]);
MapSetAt(hMap, "Mot-No132", ["3.0l", "4 Valves", "150kW"]);
ssKey = "Mot-No42";
svMotData = MapLookup(hMap, ssKey);
if (ObjGetOk() == FALSE) {
    MessageBox(sprintf("Key \"%s\" not found", ssKey));
    return FALSE;
}
sprintf("The engine has %s" svMotData[3]);

	Create and Destroy
MapCreate	MapCreate creates a new map object.
MapDestroy	MapDestroy destroys the given map and frees any memory the map occupied.

	Set
MapInitHashTable	MapInitHashTable initializes the hash table.
MapLoad	MapLoad loads a map from a file, that was created with the MapSave function.
MapPrint	MapPrint prints the data elements of a map into the command window.
MapRemoveAt	MapRemoveAt looks up the map entry corresponding to the supplied key. If the key is found, it removes the entry.
MapSave	The MapSave function saves the data elements of a map in a file.
MapSetAt	MapSetAt means to insert an element in a map. First, the key is looked up. If the key is found, then the corresponding value is changed; otherwise a new key-value pair is created.
OBJRemoveMap	OBJRemoveMap
OBJSetMap	OBJSetMap saves a map in an object.

	Get
MapCopy	MapCopy creates a copy of the given map object.
MapGetCount	MapGetCount returns the number of elements in the map.
MapGetKeys	MapGetKeys returns a vector of keys.
MapKeyExists	Checks if a key already exists in the map.
MapLookup	MapLookup uses a hashing algorithm to quickly find the map element with a key that exactly matches the given key.
OBJGetMap	OBJGetMap returns a map handle for a given name saved in the specified object.
OBJGetMapNames	OBJGetMapNames returns a string vector with map names or an empty string if the object does not contain any maps.

See also

UniScript Functions Overview

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