CODEWITHSUNDEEP
javascriptarraysjsonobject
errorous
errorous

Reputation: 1071

How to parse json arrays into array rather than object

I have following foobar variable which is string(I get it like so by querying a webserver with $http.post):

var foobar = "[{param1: 'value1'}, {param2: 'value2'}]";

How do I make an array out of that? If I use JSON.parse, it will provide me with an object(tried typeof foobar). But, if I then use delete param1, it will then make it [null, {param2: 'value2'}]. What I want to do, basically is to remove first or second item. Also, value may be different, but keys will always stay the same, ie. they'll be numbers.

Upvotes: 1

Views: 83

Answers (5)

Jarod Moser
Jarod Moser

Reputation: 7338

What's probably confusing you the most is typeof.

In the case of arrays, typeof will say it is an object (as you can read from MDN here). If you want to test to see if a variable is an array, you could use: foobar.isArray()

Upvotes: 0

Taplar
Taplar

Reputation: 24965

Seems like you're wanting to parse your array into a single object, from your delete statement. If so...

var foobar = '[{"param1":"value1"},{"param2":"value2"}]';
var json = JSON.parse(foobar);

json = json.reduce(function(previousValue, currentValue){
  Object.keys(currentValue).forEach(function(key){
    previousValue[key] = currentValue[key];
  });
  return previousValue;
}, {});

console.log(json);

I could be wrong though.

Upvotes: 2

Julio Aguilar
Julio Aguilar

Reputation: 352

As the others say, what you are providing is already an array.

var foobar = [{param1: 'value1'}, {param2: 'value2'}];
//You can see this because of the []
//You can delete the index of an array by using the splice method
foobar.splice(1,1);
//First param is the index, the second is the number of items to erase

Upvotes: 0

Christos
Christos

Reputation: 53958

This 

var foobar = [{param1: 'value1'}, {param2: 'value2'}];

is an array.

var foobar = [{param1: 'value1'}, {param2: 'value2'}];
console.log(foobar instanceof Array)

If you want to remove the first item you can just use the shift method:

var foobar = [{param1: 'value1'}, {param2: 'value2'}];
foobar.shift();
console.log(foobar)

While if you want to remove the second item you can use the pop method:

var foobar = [{param1: 'value1'}, {param2: 'value2'}];
foobar.pop();
console.log(foobar)

Upvotes: 0

abc123
abc123

Reputation: 18753

Description

This is already an array var foobar = [{param1: 'value1'}, {param2: 'value2'}];.

Example

var foobar = [{param1: 'value1'}, {param2: 'value2'}];
// this is an array
console.log(foobar);
// this is an object in an array
console.log(foobar[0]);

Upvotes: 0

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