JavaScript。从关联数组中提取值
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JavaScript. Extract values from associative array
提问by Jonathan Clark
How can I get the values from this associative array in JavaScript?
如何从 JavaScript 中的关联数组中获取值？
I just need the email addresses and not the labels.
我只需要电子邮件地址而不是标签。
(
{
office = ("[email protected]");
home = ("[email protected]");
work = ("[email protected]");
},
{
home = ("[email protected]");
}
)
UPDATE: Prefered output in JSON would be:
更新：JSON 中的首选输出是：
{
"data": [
{
"email": "[email protected]"
},
{
"email": "[email protected]"
},
{
"email": "[email protected]"
},
{
"email": "[email protected]"
}
]
}
Thankful for all input!
感谢所有输入！
回答by pawlik
What you probably meant to do is:
你可能想要做的是：
var x = [{
office: ("[email protected]"),
home: ("[email protected]"),
work: ("[email protected]")
},
{
home: ("[email protected]")
}]
and:
和：
for(var j = 0; j < x.length; j++)
{
for(var anItem in x[j])
{
console.log(x[j][anItem])
}
}
// EDIT: however, it's not the best practiceto use for … in.
Maybe you could change your data structure to:
也许您可以将数据结构更改为：
var x = [[{
value: "[email protected]",
type: "office"
},
{
value: "[email protected]",
type: "home"
},
{
value: "[email protected]",
type: "work"
}],
[{
value: "[email protected]",
type: "home"
}]];
and iterate over using:
并迭代使用：
for( var i = 0, xlength = x.length; i < xlength; i++ )
{
for( var j=0, ylength = x[i].length; j < ylength; j++ )
{
console.log(x[i][j].value);
}
}
回答by Tejs
You can 'foreach' over the object to get it's properties:
您可以在对象上“foreach”以获取其属性：
for(var j = 0; j < mySet.length; j++)
{
for(var propName in mySet[j])
{
var emailAddress = mySet[j][propName];
// Do Stuff
}
}
回答by Sapphire_Brick
Here's a one-liner:
这是一个单行：
console.log(Object.keys(assoc).map(k => assoc[k]));
where var assoc = // your associative array.
哪里var assoc = // your associative array。
回答by Carmine Ingaldi
Is it your input in JSON format? Because if so, it's the wrong syntax. However
是您输入的 JSON 格式吗？因为如果是这样，那就是错误的语法。然而
let _in = [
{
office : "[email protected]",
home : "[email protected]",
work : "[email protected]",
},
{
home : "[email protected]"
}
]
let _out = []
_in.forEach( record => {
_out = _out.concat(Object.values(record).map(x => new Object({email : x})))
})
console.log(_out)
for each record I extracted values and "packed" into an object with the "email" attrbiute, then I merged all those arrays obtained from the original array of records
对于每条记录，我提取值并“打包”到一个带有“电子邮件”属性的对象中，然后我合并了从原始记录数组中获得的所有数组
回答by pawlik
Answer for edited question:
编辑问题的答案：
var ret = {data: []};
for(var j = 0; j < x.length; j++)
{
for(var anItem in x[j])
{
ret.data.push({
email: x[j][anItem]
});
}
}
console.log(ret);
The result is kept in ret.
结果保存在ret.
