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Generics em R - Exemplo 2
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library ("methods") | |
# Classe | |
setRefClass("contacts", | |
fields = list ( | |
id = "numeric", | |
first_name = "character", | |
last_name = "character", | |
age = "numeric", | |
email = "character" | |
) | |
) | |
# Criação da instância da classe `contacts` | |
Contacts <- new("contacts") | |
# Leitura da classe | |
class <- Contacts$getClass() | |
# Leitura dos campos da classe | |
class_fields <- class@fieldClasses | |
# Extração dos nomes das propriedades | |
field_names <- names(class_fields) | |
# Acessando uma propriedade da classe de forma dinâmica | |
Contacts[["id"]] <- 0 | |
Contacts[["email"]] <- "alexandre@aledsz.com.br" | |
# Preenchendo dados de um data.frame em uma classe (e vice-versa, se quiser) | |
dados <- data.frame ( | |
id = 0, | |
first_name = "Alexandre", | |
last_name = "de Souza", | |
age = 22, | |
email = "alexandre@aledsz.com.br" | |
) | |
for (field in field_names) { | |
Contacts[[field]] <- dados[1, field] | |
} |
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