Librerías \ HashMap

Referencia para la versión de Wiring 1.0 Build 0100+. Si tiene una versión previa, use la referencia incluida con su software. Si encuentra errores o tiene comentarios, no dude en contactarnos.

Clase

HashMap

Nombre

keyAt()

Ejemplos
#include <HashMap.h>
//create hashMap that pairs char* to int and can hold 3 pairs
CreateHashMap(hashMap, char*, int, 3); 

void setup()
{
  Serial.begin(9600);
  //add and store keys and values
  hashMap["newKey"] = 12;
  hashMap["otherKey"] = 13;

  //check if overflow (there should not be any danger yet)
  Serial.print("Will the hashMap overflow now [after 2 assigns] ?: ");
  Serial.println(hashMap.willOverflow());

  hashMap["lastKey"] = 14;

  //check if overflow (this should be true, as we have added 3 of 3 pairs)
  Serial.print("Will the hashMap overflow now [after 3 assigns] ?: ");
  Serial.println(hashMap.willOverflow());

  //it will overflow, but this won't affect the code.
  hashMap["test"] = 15;

  //change the value of newKey
  Serial.print("The old value of newKey: ");
  Serial.println(hashMap["newKey"]);

  hashMap["newKey"]++;

  Serial.print("The new value of newKey (after hashMap['newKey']++): ");
  Serial.println(hashMap["newKey"]);

  //remove a key from the hashMap
  hashMap.remove("otherKey");

  //this should work as there is now an availabel spot in the hashMap
  hashMap["test"] = 15;

  printHashMap();
}

void loop() {
}

void printHashMap() 
{
  for (int i=0; i<hashMap.size(); i++) 
  {
    Serial.print("Key: ");
    Serial.print(hashMap.keyAt(i));
    Serial.print(" Value: ");
    Serial.println(hashMap.valueAt(i));
  }
}
Descripción Obtiene una llave en un índice específico.
Sintaxis
keyAt(idx)
Parámetros
idx El índice de donde se obtendrá la llave.
Retorna La llave en el índice idx.
Uso Application
Updated on July 07, 2011 11:15:03pm PDT

Creative Commons License