BitGO – 从对象数组中获取MIN值

Bitgo提供所有的交易作为对象，并始终保持在一个大arrays。 在嵌套的.entries里面，我们看到第一个TX对象有两个负值-312084680和-4254539，我只需要这个最低值。 我的代码工作并logging所有交易，但只有从一个地址发送货币才是正确的。 如果存在两个负值，则logging3个事务，而不是2个。

var allTxs = [ { "id": "e5216ffaaa2a37bcc14380db07f06c85a65bcdc4e1fcab2bd5523f0b8a11bc15", "normalizedHash": "0709c99097386a3c0130f3d6b002acf6a4e37978406704268fc9d308eec4c2b8", "date": "2016-04-17T20:07:03.700Z", "fee": 7440, "inputs": [ { "previousHash": "6d043a06ade4eac5315967c463fcd65deb4ed9bff23ee3e73ff82c9cf72360e9", "previousOutputIndex": 1 }, { "previousHash": "b6e566cbee0f23bee7b321eda7f6159a165101e77e7f1e75bd9eb6e31540b391", "previousOutputIndex": 0 } ], "outputs": [ { "vout": 0, "account": "2N5Jr87jhTuAHab37VKWNPhoH1WUEHkVg1Q", "value": 312500000, "isMine": true, "chain": 0, "chainIndex": 0 }, { "vout": 1, "account": "mmRuajWq2xPYQw4gjXz8pQ2fUfJTF7fvYe", "value": 3831779 } ], "entries": [ { "account": "2N5Jr87jhTuAHab37VKWNPhoH1WUEHkVg1Q", "value": 312500000 }, { "account": "muEePZzkRWX3RnLWHxTx6r8T3MMruTgMgg", "value": -312084680 }, { "account": "mmRuajWq2xPYQw4gjXz8pQ2fUfJTF7fvYe", "value": 3831779 }, { "account": "n47gD5D3XfBG41tWKX4YHNc9gboyWU9yJg", "value": -4254539 } ], "confirmations": 677, "pending": false, "instant": false, "blockhash": "000000000000020f526fe18af7536fa4e816694c4dec865e0d87d6b722b643d9", "height": 786821 }, { "id": "71fb53e7d70ce27dced2eb327ac544b8f046e66480342ba81533046f3267e6f4", "normalizedHash": "80116b194b58b494d85b2a831815a978ec6f0fe617cfd020880ff1ad76b2bacc", "date": "2016-04-17T20:06:56.474Z", "fee": 4480, "inputs": [ { "previousHash": "1f4145b615f5d067160184a3e9660396f826614c3fcae9abdcb7192c615b843a", "previousOutputIndex": 0 } ], "outputs": [ { "vout": 0, "account": "2N5Jr87jhTuAHab37VKWNPhoH1WUEHkVg1Q", "value": 625000000, "isMine": true, "chain": 0, "chainIndex": 0 }, { "vout": 1, "account": "mpntSJWk116JF58VRDxeMMwr4gC7afVEKt", "value": 390110612 } ], "entries": [ { "account": "2N5Jr87jhTuAHab37VKWNPhoH1WUEHkVg1Q", "value": 625000000 }, { "account": "mqRsJr8szT5XTSLm3CU7i9ePa7kWnC2VWs", "value": -1015115092 }, { "account": "mpntSJWk116JF58VRDxeMMwr4gC7afVEKt", "value": 390110612 } ], "confirmations": 689, "pending": false, "instant": false, "blockhash": "000000000000020f526fe18af7536fa4e816694c4dec865e0d87d6b722b643d9", "height": 786821 } ]; for (var i=0; i<allTxs.length; i++) { if(allTxs[i].confirmations >= 7 ) { var tx = allTxs[i]; var value = 0; for (var entriesIndex = 0; entriesIndex < tx.entries.length; ++entriesIndex) { if (tx.entries[entriesIndex].account === wallet.id()) { value += tx.entries[entriesIndex].value; } } for ( var receivedFrom = 0; receivedFrom < tx.entries.length; ++receivedFrom ){ if (tx.entries[receivedFrom].value < 0){ var verb = (value > 0) ? 'Received' : 'Sent'; console.log(tx.entries[receivedFrom].account + ' : ' + verb + ' ' + (value / 1e8).toFixed(8)); } } } } 

这是魔术发生的地方：

 if (tx.entries[receivedFrom].value < 0){ // both values are less than 0 

希望有人发现这个容易，伸出援助之手！

Answer 1

我做了一些改动来提高代码的可读性，改变variables的名称，并使用forEach来代替传统的for循环。 还创build了一个名为minEntry的对象，该对象存储最低值的条目。 希望这对你有所帮助

  var allTransactions = [ { "id": "e5216ffaaa2a37bcc14380db07f06c85a65bcdc4e1fcab2bd5523f0b8a11bc15", "normalizedHash": "0709c99097386a3c0130f3d6b002acf6a4e37978406704268fc9d308eec4c2b8", "date": "2016-04-17T20:07:03.700Z", "fee": 7440, "inputs": [ { "previousHash": "6d043a06ade4eac5315967c463fcd65deb4ed9bff23ee3e73ff82c9cf72360e9", "previousOutputIndex": 1 }, { "previousHash": "b6e566cbee0f23bee7b321eda7f6159a165101e77e7f1e75bd9eb6e31540b391", "previousOutputIndex": 0 } ], "outputs": [ { "vout": 0, "account": "2N5Jr87jhTuAHab37VKWNPhoH1WUEHkVg1Q", "value": 312500000, "isMine": true, "chain": 0, "chainIndex": 0 }, { "vout": 1, "account": "mmRuajWq2xPYQw4gjXz8pQ2fUfJTF7fvYe", "value": 3831779 } ], "entries": [ { "account": "2N5Jr87jhTuAHab37VKWNPhoH1WUEHkVg1Q", "value": 312500000 }, { "account": "muEePZzkRWX3RnLWHxTx6r8T3MMruTgMgg", "value": -312084680 }, { "account": "mmRuajWq2xPYQw4gjXz8pQ2fUfJTF7fvYe", "value": 3831779 }, { "account": "n47gD5D3XfBG41tWKX4YHNc9gboyWU9yJg", "value": -4254539 } ], "confirmations": 677, "pending": false, "instant": false, "blockhash": "000000000000020f526fe18af7536fa4e816694c4dec865e0d87d6b722b643d9", "height": 786821 }, { "id": "71fb53e7d70ce27dced2eb327ac544b8f046e66480342ba81533046f3267e6f4", "normalizedHash": "80116b194b58b494d85b2a831815a978ec6f0fe617cfd020880ff1ad76b2bacc", "date": "2016-04-17T20:06:56.474Z", "fee": 4480, "inputs": [ { "previousHash": "1f4145b615f5d067160184a3e9660396f826614c3fcae9abdcb7192c615b843a", "previousOutputIndex": 0 } ], "outputs": [ { "vout": 0, "account": "2N5Jr87jhTuAHab37VKWNPhoH1WUEHkVg1Q", "value": 625000000, "isMine": true, "chain": 0, "chainIndex": 0 }, { "vout": 1, "account": "mpntSJWk116JF58VRDxeMMwr4gC7afVEKt", "value": 390110612 } ], "entries": [ { "account": "2N5Jr87jhTuAHab37VKWNPhoH1WUEHkVg1Q", "value": 625000000 }, { "account": "mqRsJr8szT5XTSLm3CU7i9ePa7kWnC2VWs", "value": -1015115092 }, { "account": "mpntSJWk116JF58VRDxeMMwr4gC7afVEKt", "value": 390110612 } ], "confirmations": 689, "pending": false, "instant": false, "blockhash": "000000000000020f526fe18af7536fa4e816694c4dec865e0d87d6b722b643d9", "height": 786821 } ]; allTransactions.forEach(function (transaction){ var value = 0; var minEntry = { value : 0 }; transaction.entries.forEach(function (entry) { //if (entry.account === wallet.id()) { value += entry.value; //} }); var verb = (value > 0) ? 'Received' : 'Sent'; transaction.entries.forEach(function (entry) { if (entry.value < minEntry.value){ minEntry = entry; } }); if(minEntry.value){ console.log(minEntry.account + ' : ' + verb + ' ' + (value / 1e8).toFixed(8)); } });