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I have a json file with contents like this:
{
"aaa":{
"status":"available",
"classkey":"dotnet"
},
"bbb":{
"ccc":{
"com":"available",
"net":"available",
"info":"available",
"org":"available"
}
}
}
Now I want to fetch the value of array by index (ex., xxx[0] like this not like xxx['aaa']). How do I do that?
478
The index indicates the position of the element within the array (starting from 1) and is either a number or a field containing a number.
To find the position of an element in an array, you use the indexOf() method. This method returns the index of the first occurrence the element that you want to find, or -1 if the element is not found.
An array is an ordered list of values that you refer to with a name and an index. For example, consider an array called emp , which contains employees' names indexed by their numerical employee number. So emp[0] would be employee number zero, emp[1] employee number one, and so on.
To find the index of an object in an array, by a specific property: Use the map() method to iterate over the array, returning only the value of the relevant property. Call the indexOf() method on the returned from map array. The indexOf method returns the index of the first occurrence of a value in an array.
You can't. Order is not guaranteed in json and most other key-value data structures. Furthermore you don't have an array, you have an object. Why use name-value pairs at all if you aren't going to use the names to access the values? Therein lies the power of json and other key-value data stores. If you need to access the values by integer indexes, then just use an array to store your data.
195
Actually you can use int index like an array in JSON, just try that:
var jsonObject = {
"0":{
"status":"available",
"classkey":"dotnet"
},
"1":{
"ccc":{
"com":"available",
"net":"available",
"info":"available",
"org":"available"
}
}
}
alert(jsonObject[0].status)
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