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| require 'csv' | |
| require 'activerecord-import' | |
| file_path = 'caminho/para/seu/arquivo.csv' | |
| users_data = [] | |
| CSV.foreach(file_path, headers: true) do |row| | |
| users_data << User.new(name: row['name'], email: row['email']) | |
| end |
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| file_path = 'caminho/para/seu/arquivo.csv' | |
| users_data = [] | |
| CSV.foreach(file_path, headers: true) do |row| | |
| users_data << {name: row['name'], email: row['email']} | |
| end | |
| User.insert_all(users_data) |
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| # Supondo que o modelo seja User com os campos name e email | |
| require 'csv' | |
| file_path = 'caminho/para/seu/arquivo.csv' | |
| CSV.foreach(file_path, headers: true) do |row| | |
| User.create(name: row['name'], email: row['email']) | |
| end |
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| def with_logging | |
| puts "Iniciando operação…" | |
| yield | |
| puts "Operação concluída." | |
| end | |
| with_logging do | |
| puts "Realizando a operação…" |
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| require 'forwardable' | |
| class Logger | |
| extend Forwardable | |
| def_delegator :@logger, :log | |
| def initialize | |
| @logger = Rails.logger | |
| end |
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| class Person | |
| def method_missing(method_name, *args) | |
| puts "Método '#{method_name}' não encontrado." | |
| end | |
| end | |
| person = Person.new | |
| person.unknown_method | |
| # Retorno: "Método 'unknown_method' não encontrado." |
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| def greet(*people) | |
| people.each do |person| | |
| puts "Olá, #{person}!" | |
| end | |
| end | |
| greet("Alice", "Bob", "Charlie") | |
| # Retorno: | |
| # Olá, Alice! |
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| name = "Sávio" | |
| age = 54 | |
| def greet(name, age) | |
| name = "Sr. #{name}" | |
| age = "#{age} anos de idade!" | |
| puts "Olá, #{name}! Você tem #{age}" | |
| end | |
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| class Person | |
| attr_accessor: name,: age | |
| def initialize(name, age) | |
| @name = name | |
| @age = age | |
| end | |
| end | |
| def greet(person) |
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| def greet(options) | |
| name = options[:name] | |
| age = options[:age] | |
| puts "Olá, #{name}! Você tem #{age} anos." | |
| end | |
| greet({ name: "Ana", age: 35 }) | |
| # Retorno: "Olá, Ana! Você tem 35 anos." |
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