我在 javascript 中更新了一个数组 (key,value) 对象
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I update an array (key,value) object in javascript
提问by Ravi Ram
How can I update an array (key,value) object?
如何更新数组（键，值）对象？
arrTotals[
{DistroTotal: "0.00"},
{coupons: 12},
{invoiceAmount: "14.96"}
]
I want to update the 'DistroTotal' to a value.
我想将“DistroTotal”更新为一个值。
I have tried
我试过了
for (var key in arrTotals) {
if (arrTotals[key] == 'DistroTotal') {
arrTotals.splice(key, 2.00);
}
}
Thanks ..
谢谢 ..
回答by Dan Saltmer
Since it sounds like you are trying to use a key/value dictionary. Consider switching to using an object instead of an array here.
因为听起来您正在尝试使用键/值字典。考虑在这里切换到使用对象而不是数组。
arrTotals = {
DistroTotal: 0.00,
coupons: 12,
invoiceAmount: "14.96"
};
arrTotals["DistroTotal"] = 2.00;
回答by Explosion Pills
You're missing a level of nesting:
您缺少嵌套级别：
for (var key in arrTotals[0]) {
If you only need to work with that specific one, then just do:
如果您只需要使用那个特定的，那么只需执行以下操作：
arrTotals[0].DistroTotal = '2.00';
If you don't know where the object with the DistroTotalkey is, or there are many of them, your loop is a bit different:
如果你不知道带DistroTotal键的对象在哪里，或者有很多对象，你的循环有点不同：
for (var x = 0; x < arrTotals.length; x++) {
if (arrTotals[x].hasOwnProperty('DistroTotal') {
arrTotals[x].DistroTotal = '2.00';
}
}
