javascript find by value deep in a nested object/array
16,365
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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Author by
Omar Badran
Updated on November 01, 2022Comments
-
Omar Badran over 1 year
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. -
Omar Badran over 6 yearsthanks a lot @smarx, this is what i wanted , I was looking for a solution for 6 hours , Thanks again