JavaScript. Extract values from associative array

Question

How can I get the values from this associative array in JavaScript?

I just need the email addresses and not the labels.

(
 {
 office = ("[email protected]");
 home = ("[email protected]");
 work = ("[email protected]");
 },
 {
 home = ("[email protected]");
 }
)

UPDATE: Prefered output in JSON would be:

{
 "data": [
 {
 "email": "[email protected]"
 },
 {
 "email": "[email protected]"
 },
 {
 "email": "[email protected]"
 },
 {
 "email": "[email protected]"
 }
 ]
}

Thankful for all input!

Answer 1

What you probably meant to do is:

var x = [{
 office: ("[email protected]"),
 home: ("[email protected]"),
 work: ("[email protected]")
},
{
 home: ("[email protected]")
}]

and:

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 practice to use for ... in.

Maybe you could change your data structure to:

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:

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);
 }
}

• Jonathan Clark: I cannot change the data structure. I am developing an iPhone application in Appcelerator and this is what I get when I request information from the build in addressbook. They best would be if I could get the final output (addresses only) in JSON format. Is this possible?
• Jonathan Clark: The current out put is now: [["[email protected]"],["[email protected]"],["[email protected]"],["[email protected]"]] in JSON. I would be cool if this could be: {"data": [{"email": "[email protected]"},{"email": "[email protected]"},{"email": "[email protected]"},{"email": "[email protected]"}]}. Is this possible?

Answer 2

Here's a one-liner:

console.log(Object.keys(assoc).map(k => assoc[k]));

where assoc is your associative array.

Edit

I have a better answer here.

Answer 3

It seems that you're looking for Object.values.

• Ray Coder: Please give the specific answer that refer to the question

Answer 4

You can 'foreach' over the object to get it's properties:

for(var j = 0; j < mySet.length; j++)
{
 for(var propName in mySet[j])
 {
 var emailAddress = mySet[j][propName];
 // Do Stuff
 }
}

• Jonathan Clark: I got an error with the above code (myObj) changed it to mySet and made an alert of emailAddress but each alert was empty. What is wrong?
• Jonathan Clark: This time it worked perfectly! Thanks! Is it possible to rename all labels to the same name for example the word email instead of work?
• Tejs: You can translate those values into another object of your choosing.
• Jonathan Clark: he current out put is now: [["[email protected]"],["[email protected]"],["[email protected]"],["[email protected]­e"]] in JSON. I would be cool if this could be: {"data": [{"email": "[email protected]"},{"email": "[email protected]"},{"email": "[email protected]"},{"email": "[email protected]"}]}. Is this possible?

Answer 5

Answer for edited question:

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.

Answer 6

Is it your input in JSON format? Because if so, it's the wrong syntax. However

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