I like to know how i can get first specific value in a json like
$.each(data, function(i, val){
console.log(val.name);
});
sample output of above code is like this
John
Mary
Kite
but i like to get only first value like this
John
3 Answers
If data is an array, you can do
name=data[0].name
If it's an object, it's slightly more complicated
name=data[Object.keys(data)[0]].name;
Keep in mind that object keys aren't really sorted in any particular order
7 Comments
cookie monster
The
Object.keys approach won't guarantee any particular item as the "first" item. ... "...object keys aren't really sorted except for the order you put it in." No, there is no order. The order you give guarantees nothing.
scrblnrd3
@cookiemonster I thought that if you put three properties in an object like
obj={foo:"bar",baz:"qux"}, this will give foo firstcookie monster
@scrblnrd3: No, there are no guarantees as to the order. That goes for
for-in as well as Object.keys. Different browsers may behave differently. The same browser may even behave differently in different situations.scrblnrd3
Could you give an example please?
elclanrs
It's specified partially here sec-12.6.4 -- "The mechanics and order of enumerating the properties is not specified" -- and probably somewhere else.
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It depends on the structure of the json object but it should look like this:
data[0].name
Comments
If you return false from the iteration function, $.each() terminates the loop. So you can simply return false the first time:
$.each(data, function(i, val){
console.log(val.name);
return false;
});
Since object elements don't have any inherent order, there's no guarantee this will print a specific name. It will just pick one of the names arbitrarily.
data? Object or arrayJSON.parse()and pass it a "reviver" function. I think it'll give you the properties you encounter in order, though it'll traverse into a nested object before giving you the key for that object.JSON.parse()it, and use the property you found to grab the first.,