Looping in my array of errors (key/value) in javascript

Question

I have a variable with some data (key/value):

var errors = JSON.parse(xhr.responseText);

Here is the content:

 {
 "vehicle.Model":"Le champ Model est requis.",
 "vehicle.Brand":"Le champ Brand est requis.",
 "vehicle.Registration":"Le champ Registration est requis."
 }

I would like to loop into it and display the key and the value for each.

How to proceed?

Thanks.

Fabien · Accepted Answer · 2013-03-06 11:04:32Z

1

var key;

for (key in errors) {
   if (errors.hasOwnProperty(key)) {
      console.log(key + " : " + errors[key]);
   }
}

answered Mar 6, 2013 at 11:04

Fabien

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3 Comments

Denys Séguret Over a year ago

Don't use hasOwnProperty if you just got the object using JSON.parse.

Stuart Grant Over a year ago

always check the 'hasOwnProperty' so you dont end up in the prototype chain.

Fabien Over a year ago

Always using hasOwnProperty is a good practice IMO, regardless of where the data is coming from, although this is not mandatory here. Code review and further maintenance / evolution will be easier.

Denys Séguret · Accepted Answer · 2013-03-06 11:04:14Z

0

for (var key in errors) {
   var code = key;
   var label = errors[key];
   ...
}

Note that there is no guarantee regarding the iteration order in today's ECMAScript.

I'd recommend you to read MDN's Working with objects.

answered Mar 6, 2013 at 11:04

Denys Séguret

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1 Comment

Fabien Over a year ago

You're not using the code variable (it seems useless anyway).

Garfield · Accepted Answer · 2013-03-06 11:06:13Z

0

for( key in errors ){console.log(key + " = " + errors.key);}

answered Mar 6, 2013 at 11:06

Garfield

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