[英]In JavaScript, how to access object properties inside an array of object?
您可以直接从transaction
访问.tester_transaction
对象及其属性(并检查是否定义了tester_transaction
):
transactions.map((transaction, index) => {
console.log(transaction.company_name)
console.log(transaction.project_name)
if (transaction.tester_transaction !== undefined) {
console.log(transaction.tester_transaction.status)
console.log(transaction.tester_transaction.amount)
}
})
transactions.map((transaction, index) => {
if(transaction.hasOwnProperty("company_name")){
console.log(transaction.company_name);
}
if(transaction.hasOwnProperty("company_name")){
console.log(transaction.project_name);
}
if(transaction.hasOwnProperty("tester_transaction")){
console.log(transaction.tester_transaction.amount);
}
if(transaction.hasOwnProperty("tester_transaction")){
console.log(transaction.tester_transaction.status);
}
});
不要忘记检查该属性是否存在。
transactions.map((t) => {
console.log(t. tester_transaction.amount)
console.log(t.status)
})
此代码违反了Map的使用。
阅读有关地图的更多信息: https : //developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map
请使用简单的for of..
循环,因为您的目的是仅获取值并将其打印出来。
for(const transaction of transactions) {
console.log(transaction.company_name || '');
console.log(transaction.project_name || '');
if(!transaction. tester_transaction)
continue;
console.log(transaction.tester_transaction.amount || '');
console.log(transaction.tester_transaction.status || '');
}
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