I have problem with get string in JSON data. Format as below:
[
{
"name": "Alice",
"age": "20"
},
{
"id": "David",
"last": "25"
},
{
"id": "John",
"last": "30"
}
]
Sometime it changes position together, John
from 3rd place go to 2nd place:
[
{
"name": "Alice",
"age": "20"
},
{
"name": "John",
"age": "30"
},
{
"name": "David",
"age": "25"
}
]
If i use data[3].age
to get John
's age, and data change position, I will get David
's age.
Is there any method I can use to find the object with name
David
and get the age
value?
You can use array.find()
method as,
var myArray = [ { "name": "Alice", "age": "20" }, { "name": "John", "age": "30" }, { "name": "David", "age": "25" } ]; //Here you are passing the parameter name and getting the age //Find will get you the first matching object var result = myArray.find(t=>t.name ==='John').age; console.log(result);
最好使用array.filter() (更好的浏览器支持)
myArray.filter(function(el){return el.name == "John"})[0].age
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