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Start your free trialDavid Greenstein
6,734 PointsWhy do I have to use [:amount] instead of ["amount"]
def balance
balance = 0
@transactions.each do |transaction|
balance += transaction["amount"]
end
return balance
end
class BankAccount
attr_reader :name
def initialize(name)
@name = name
@transactions = []
add_transaction("Beginning Balance", 0)
end
def debit(description, amount)
add_transaction(description, -amount)
end
def credit(description, amount)
add_transaction(description, amount)
end
def add_transaction(description, amount)
@transactions.push(description: description, amount: amount)
end
def balance
balance = 0
@transactions.each do |transaction|
balance += transaction["amount"]
end
return balance
end
end
1 Answer
Michael Hulet
47,913 PointsPreviously, the value you're looking for was added to the @transactions
hash using the symbol :amount
as a key, and not the string "amount"
. Thus, to reference it again, you'll have to use the symbol instead of the string, because doing @transactions[:amount]
is entirely different from doing @transaction["amount"]
, as strings are not symbols and vice versa