hello , I have a problem returning an object in my function, Let's say I have an object:
var elements = [{
"fields": null,
"id_base": "nv_container",
"icon": "layout",
"name": "container",
"is_container": true,
"elements" : [
//another elements set here
]
},
{
"id_base": "novo_example_elementsec",
"name": "hello",
"icon": "edit",
"view": {}
}];
what i want is a function (in pure javascript) that can find an object with a specific key and value , and i have created a function but its just not working fine ? , my function :
function findNested(obj, key, value) {
//Early return
if (obj[key] === value) {
console.log( 'before return' ); //until here . its fine
return obj; //not working
} else {
for (var i = 0, len = Object.keys(obj).length; i <= len; i++) {
if (typeof obj[i] == 'object') {
this.findNested(obj[i] , key, value);
}
}
}
}
I just can't see what I've done wrong ?
thanks.
To use: let result = deepSearchByKey(arrayOrObject, 'key', 'value'); This will return the object containing the matching key and value.
A nested data structure is an array or object which refers to other arrays or objects, i.e. its values are arrays or objects. Such structures can be accessed by consecutively applying dot or bracket notation. Here is an example: const data = { code: 42, items: [{ id: 1, name: 'foo' }, { id: 2, name: 'bar' }] };
To access the elements of the inner arrays, you simply use two sets of square brackets. For example, pets[1][2] accesses the 3rd element of the array inside the 2nd element of the pets array.
You're missing a return after making the recursive call. If the object is found after recursing, you need to continue to bubble that result up (by returning it). You should also be using i < len
(not i <= len
) as pointed out by @scott-marcus.
var elements = [{
"fields": null,
"id_base": "nv_container",
"icon": "layout",
"name": "container",
"is_container": true,
"elements": [
//another elements set here
]
},
{
"id_base": "novo_example_elementsec",
"name": "hello",
"icon": "edit",
"view": {}
}
];
function findNested(obj, key, value) {
// Base case
if (obj[key] === value) {
return obj;
} else {
for (var i = 0, len = Object.keys(obj).length; i < len; i++) {
if (typeof obj[i] == 'object') {
var found = this.findNested(obj[i], key, value);
if (found) {
// If the object was found in the recursive call, bubble it up.
return found;
}
}
}
}
}
console.log(findNested(elements, "icon", "layout")); // returns object
console.log(findNested(elements, "icon", "edit")); // returns object
console.log(findNested(elements, "foo", "bar")); // returns undefined
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