On Javascript, how to re-arrange an array

Question

I have the following javascript array var rows.

[
    { email: '[email protected]' },
    { email: '[email protected]' }
]

Of which, I wanted to make it just...

[
    '[email protected]',
    '[email protected]'
]

So, I tried to loop it using forEach

rows.forEach(function(entry) {
    console.log('entry:');
    console.log(entry.email);
});

However, I am stuck with that.

entry:
[email protected]
entry:
[email protected]

Any help is appreciated.

Note: You already have the question tagged with node.js and javascript, so they don't need to be listed again in the title. — Jonathan Lonowski
– Jonathan Lonowski, Commented Jul 19, 2013 at 8:30

James Allardice · Accepted Answer · 2013-07-19 08:26:23Z

9

You can use Array.prototype.map:

var newArray = oldArray.map(function (obj) {
    return obj.email;
});

answered Jul 19, 2013 at 8:26

James Allardice

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3 Comments

Louie Miranda Over a year ago

I think this would be the answer. However, node.js is throwing. TypeError: Object #<RowDataPacket> has no method 'map'. Anyway, that's a different problem that I need to solve.

Louie Miranda Over a year ago

Would it be correct, if I add the .map answer inside the forEach loop?

Niccolò Campolungo Over a year ago

See if you can do something like Array.prototype.splice.call(this, rows).map(...);, I don't know what RowDataPacket is but maybe a slice works. Otherwise you have to loop with foreach and store the values in a new array.

AndyD · Accepted Answer · 2013-07-19 09:47:32Z

2

here is your solution

var rows =[
    { email: '[email protected]' },
    { email: '[email protected]' }
];
var yop = [];
rows.forEach(function(entry) {
    yop.push(entry.email);
});

console.log(yop);

edited Jul 19, 2013 at 9:47

AndyD

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answered Jul 19, 2013 at 9:18

GwenM

1,37512 silver badges27 bronze badges

1 Comment

Akshat Jiwan Sharma Over a year ago

This would work although there is no need for the new keyword.

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