我有一个类似于此的Ruby哈希数组：
[
{
:account_id=>52,
:amount_credit=>0.0,
:amount_debit=>#<BigDecimal:7ff3f6f51c88,'0.1316837E7',9(18)>
},
{
:account_id=>57,
:amount_credit=>0.0,
:amount_debit=>#<BigDecimal:7ff3f8157590,'0.0',9(18)>
},
...
]
如果有多个条目具有相同的account_id，我会尝试按account_id对此进行分组。我会将它们分组并检查借方和贷方，如果借方高于贷方，然后借记 - 贷方，并将金额放入借方，反之亦然。
另一种情况
final_entries = []
entries = # the first entry that I put on the top
entries.group_by {|a| a[:account_id]}.each do |contents|
if contents.length > 1
get_id = []
get_debit = []
get_credit = []
contents.each do |subject|
get_id << subject.account_id
get_debit << subject.amount_debit unless subject.amount_debit == 0
get_credit << subject.amount_credit unless subject.amount_credit == 0
if get_debit.sum > get_credit.sum
total = get_debit.sum - get_credit.sum
final_entries << { account_id: get_id[0], amount_credit: 0.0, amount_debit: total }
else
total = get_credit.sum - get_debit.sum
final_entries << { account_id: get_id[0], amount_credit: total, amount_debit: 0.0 }
end
end
else
final_entries << contents
end
end
错误NoMethodError：未定义的方法`account_id＆＃39;为52：Fixnum
答案 0 :(得分：1)
我使用了Uday使用的借记值，并提出了以下解决方案。
accounts = [{:account_id=>52, :amount_credit=>0.0, :amount_debit=>12.3434},
{:account_id=>57, :amount_credit=>0.0, :amount_debit=>12.3434},
{:account_id=>59, :amount_credit=>0.0, :amount_debit=>12.3434},
{:account_id=>58, :amount_credit=>0.0, :amount_debit=>12.3434},
{:account_id=>39, :amount_credit=>12.3434, :amount_debit=>0.0},
{:account_id=>40, :amount_credit=>12.3434, :amount_debit=>0.0},
{:account_id=>41, :amount_credit=>12.3434, :amount_debit=>0.0},
{:account_id=>35, :amount_credit=>12.3434, :amount_debit=>0.0},
{:account_id=>4, :amount_credit=>12.3434, :amount_debit=>0.0},
{:account_id=>31, :amount_credit=>0.0, :amount_debit=>12.3434},
{:account_id=>62, :amount_credit=>0.0, :amount_debit=>12.3434},
{:account_id=>53, :amount_credit=>0.0, :amount_debit=>12.3434},
{:account_id=>35, :amount_credit=>0.0, :amount_debit=>12.3434},
{:account_id=>52, :amount_credit=>12.3434, :amount_debit=>0.0},
{:account_id=>53, :amount_credit=>12.3434, :amount_debit=>0.0},
{:account_id=>31, :amount_credit=>12.3434, :amount_debit=>0.0},
{:account_id=>16, :amount_credit=>12.3434, :amount_debit=>0.0}]
accounts = accounts.group_by{|account| account[:account_id]}
.map {|id, records|
amount_credit = records.sum {|record| record[:amount_credit]}
amount_debit = records.sum {|record| record[:amount_debit]}
if amount_debit > amount_credit
{account_id: id,
amount_debit: amount_debit - amount_credit}
else
{account_id: id,
amount_credit: amount_credit - amount_debit}
end
}
p accounts
我在这里做的是我首先通过他们的account_id对帐户哈希进行分组，并在结果哈希上执行一个映射，以返回新数组的哈希值。
我相信这就是你在这里看到的。希望这会有所帮助。
我得到的结果是：
[{:account_id => 52,
:amount_credit => 0.0
}, {:account_id => 57,
:amount_debit => 12.3434
}, {:account_id => 59,
:amount_debit => 12.3434
}, {:account_id => 58,
:amount_debit => 12.3434
}, {:account_id => 39,
:amount_credit => 12.3434
}, {:account_id => 40,
:amount_credit => 12.3434
}, {:account_id => 41,
:amount_credit => 12.3434
}, {:account_id => 35,
:amount_credit => 0.0
}, {:account_id => 4,
:amount_credit => 12.3434
}, {:account_id => 31,
:amount_credit => 0.0
}, {:account_id => 62,
:amount_debit => 12.3434
}, {:account_id => 53,
: amount_credit => 0.0
}, {:account_id => 16,
:amount_credit => 12.3434
}]
答案 1 :(得分：1)
让我来看看你现有的代码：
entries.group_by {|a| a[:account_id]}.each do |contents|
if contents.length > 1 # This will always be true, since contents is an Array of [account_id, [entries]]
get_id = []
get_debit = []
get_credit = []
contents.each do |subject| # Again, contents is a Hash of account_id => [entries]; should be |id, entries|
get_id << subject.account_id # Even if this was a single entry, this wouldn't work since it's a Hash; should be subject[:account_id]
get_debit << subject.amount_debit unless subject.amount_debit == 0 # Fails for the same reason
get_credit << subject.amount_credit unless subject.amount_credit == 0 # Fails for the same reason
if get_debit.sum > get_credit.sum # We're summing what we saved, but excluded 0 values even though they don't change the sum?
total = get_debit.sum - get_credit.sum # Avoid summing again
final_entries << { account_id: get_id[0], amount_credit: 0.0, amount_debit: total }
else
total = get_credit.sum - get_debit.sum
final_entries << { account_id: get_id[0], amount_credit: total, amount_debit: 0.0 }
end
end
else
final_entries << contents
end
end
现在我会做什么：
final_entries = entries
.group_by { |entry| entry[:account_id] }
.map do |id, acct_entries|
return acct_entries.first if acct_entries.size == 1
credit = acct_entries.map { |entry| entry[:amount_credit] }.sum
debit = acct_entries.map { |entry| entry[:amount_debit] }.sum
if credit > debit
credit -= debit
debit = 0.0
else
debit -= credit
credit = 0.0
end
{ account_id: id, amount_credit: credit, amount_debit: debit }
end
答案 2 :(得分：0)
答案 3 :(得分：0)
final_entries = []
entries.group_by {|a| a[:account_id]}.each do |key, value|
if value.length > 1
get_debit = []
get_credit = []
value.each do |subject|
get_debit << subject[:amount_debit] if subject[:amount_debit] > 0
get_credit << subject[:amount_credit] if subject[:amount_credit] > 0
end
if get_debit.sum > get_credit.sum
total = get_debit.sum - get_credit.sum
final_entries << { account_id: key, amount_credit: 0.0, amount_debit: total }
else
total = get_credit.sum - get_debit.sum
final_entries << { account_id: key, amount_credit: total, amount_debit: 0.0 }
end
else
final_entries << value[0]
end
end