how to return a specific key from an array

please can anyone help me with some code to get specific data from an array here's is my array

var array = [
{
"name": "Joe",
"age": 17
},
{
"name": "Bob",
"age": 17
},
{
"name": "Carl",
"age": 35
}
]


just want to return name and its values without returning age

thanks in advance.

6 Answers
6

Simple enough to access the name attribute of the object you simply need to reference the item in the array and select the name like so:

array[i].name;


Use Array.map() with array destructuring method so that you get only the name key-value. Array.map() will have only one parameter so you do not need to mention return there:

Array.map()

name

Array.map()

return

var array = [ {"name":"Joe", "age":17},{"name":"Bob", "age":17},{"name":"Carl", "age": 35}];
var res = array.map(({name}) => ({name}));
console.log(res);

You could create a helper function to get a by property object off that array :

var persons = [
{
"name": "Joe",
"age": 17
},
{
"name": "Bob",
"age": 17
},
{
"name": "Carl",
"age": 35
}
];

function getElement(personList, property, comparable) {
var arraySize = personList.length;
for(var i = 0; i < arraySize; i++) {
if (personList[i][property] == comparable) {
return personList[i]
}
}
return {"name":null, "age":null};
}

console.log(getElement(persons, "name", "Joe")); // outputs { "name": "John", "age" : 17}
console.log(getElement(persons, "name", "Fake John")); // outputs { "name": null, "age" :null}

This way you can retrieve your person object by any property he has.

Try using the jQuery.inArray() function. I hope it will help you.



function functionname(){
var names = [ {"name":"Joe", "age":17},{"name":"Bob", "age":17},{"name":"Carl", "age": 35}];
var name = $('#name').val();
if(jQuery.inArray(name, names)) {
alert(name +" Is In Array");
} else {
alert(name + ' Is NOT In Array...');
}
}




<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" name="name" id="name"/>
<button onclick="functionname()" >Submit</button>

You can use Array#map to do that. Destructure the name from the object and return a new object with only the name.

Array#map

See the working demo below:

var array = [{
"name": "Joe",
"age": 17
}, {
"name": "Bob",
"age": 17
}, {
"name": "Carl",
"age": 35
}];

var result = array.map(({name, ...rest}) => ({name}));
console.log(result);

All these Array.Map functions facepalm

var array = [
{
"name": "Joe",
"age": 17
},
{
"name": "Bob",
"age": 17
},
{
"name": "Carl",
"age": 35
}
]

array.forEach((entry) => {
console.log(entry.name) /* Do whatever you want with `entry.name` */
})

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