foreach for JSON array , syntax

Question

my script is getting some array from php server side script.

result = jQuery.parseJSON(result);

now I want to check each variable of the array.

if (result.a!='') { something.... }
if (result.b!='') { something.... }
....

Is there any better way to make it quick like in php 'foreach' , 'while' or smth ?

UPDATE

This code ( thanks to hvgotcodes ) gives me values of variables inside the array but how can I get the names of variables also ?

for(var k in result) {
   alert(result[k]);
}

UPDATE 2

This is how php side works

$json = json_encode(array("a" => "test", "b" => "test",  "c" => "test", "d" => "test"));

If i'm not mistaken, you can access the attributes of each JSON Object by using it's name, like you would a property. e.g. JSONObject.name to get the attribute inside JSONObject that holds {'name':'foo'} — Chris - Jr
– Chris - Jr, Commented Dec 27, 2016 at 19:10

hvgotcodes · Accepted Answer · 2011-10-05 14:46:40Z

144

You can do something like

for(var k in result) {
   console.log(k, result[k]);
}

which loops over all the keys in the returned json and prints the values. However, if you have a nested structure, you will need to use

typeof result[k] === "object"

to determine if you have to loop over the nested objects. Most APIs I have used, the developers know the structure of what is being returned, so this is unnecessary. However, I suppose it's possible that this expectation is not good for all cases.

edited Oct 5, 2011 at 14:46

answered Oct 5, 2011 at 14:35

hvgotcodes

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5 Comments

Tamzin Blake Over a year ago

you're going to want to square-bracket that. Edit: you fixed it.

hvgotcodes Over a year ago

yeah i actually made sure by trying in the console. ;)

David Over a year ago

that works. but 1 more problem, how can I get the names of those variables inside array ?

hvgotcodes Over a year ago

@david, is it an array, or an object literal?

hvgotcodes Over a year ago

@david, updated the answer -- k is the key, result[k] is the value.

Hari Pachuveetil · Accepted Answer · 2011-10-05 14:38:59Z

38

Try this:

$.each(result,function(index, value){
    console.log('My array has at position ' + index + ', this value: ' + value);
});

answered Oct 5, 2011 at 14:38

Hari Pachuveetil

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Comments

yogihosting · Accepted Answer · 2023-03-17 14:25:33Z

16

You can use the .forEach() method of JavaScript for looping through JSON.

var datesBooking = [
    {"date": "04\/24\/2023"},
      {"date": "04\/25\/2023"}
    ];
    
    datesBooking.forEach(function(data, index) {
      console.log(data);
    });

edited Mar 17, 2023 at 14:25

answered Dec 2, 2018 at 12:00

yogihosting

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Comments

Tamzin Blake · Accepted Answer · 2011-10-05 14:37:18Z

12

Sure, you can use JS's foreach.

for (var k in result) {
  something(result[k])
}

answered Oct 5, 2011 at 14:37

Tamzin Blake

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