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find and update property of nested object with lodash

I have been scanning through stackoverflow topics and couldn't find answer to the problem i am having.
What i need to do is to find object inside nested (2 depths) array by some of the values and then update other of its values. I managed to put together the finding and also setting seems to work, the problem is that lodash does return main object and it updates main object, not the nested one i actually need.
lets take this structure:
var data = [
{
name: 'I',
status: "0",
categories: [
{
name: 'I1',
status: "0",
specifics: [
{
name: "I1a",
status: "0",
}
]
}
]
}
];
i need to find object inside specifics by its name and then update its status.
so lets try simple find first:
var find = _.find(data, { categories: [ { specifics: [ { name: "I1a" } ] } ]});
this is working but it returns the object with name: I so first main one.
so then if i try to update with this:
var set = _.set(_.find(data, { categories: [ { specifics: [ { name: "I1a" } ] } ]}), 'status', "1");
It also does work but it updates status of I instead of what i was looking for which is I1a.
Is there a way to make finding and therefore setting to return / work on actually queried object ?
var data = [
{
name: 'I',
status: "0",
categories: [
{
name: 'I1',
status: "0",
specifics: [
{
name: "I1a",
status: "0",
}
]
}
]
}
];
var find = _.find(data, { categories: [ { specifics: [ { name: "I1a" } ] } ]})
console.log('find', find);
var set = _.set(_.find(data, { categories: [ { specifics: [ { name: "I1a" } ] } ]}), 'status', "1");
console.log('set', set);
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js"></script>

Find the difference between two arrays based on some the value inside a nested array

I have two arrays
arrayOfItems: [
{
id: '4321-3321-4423',
value: 'some text'
},
{
id: '4322-4654-9875',
value: 'some text again'
}
]
Then the second array
itemX: [
{
id: '3214-6543-4321',
nestedArrayOfItems:[
{id: '4321-3321-4423'}
{id: '3455-8765-7764'}
]
}
]
I need to create a new array based on arrayOfItems that doesn't include any of the id's in the itemX.nestedArrayOfItems
Because of it being a nested Array I'm drawing a blank on what I need to do... I'm searching through Lodash to see if there is something that doesn't involve me using a bunch of for loops.

You can use Array.prototype.filter() and then check if the id exists with
Array.prototype.some() like so:
const arrayOfItems = [
{
id: '4321-3321-4423',
value: 'some text'
},
{
id: '4322-4654-9875',
value: 'some text again'
}
]
const itemX = [
{
id: '3214-6543-4321',
nestedArrayOfItems: [
{id: '4321-3321-4423'},
{id: '3455-8765-7764'}
]
}
]
const res = arrayOfItems.filter(item => !itemX[0].nestedArrayOfItems.some(({ id }) => id === item.id))
console.log(res);

how about this :
let difference = arrayOfItems.filter(x => ! itemX.nestedArrayOfItems.includes(x));
PS : ids must be string

Find and update value in array of nested objects

I have an object array as follows:
products = [
{
id: 1,
title: "Product 1",
specifications: {
price: 1.55,
discount: 15,
attributes: [
{
l1: 100,
l2: 80
height:200,
weight: 15,
parameters: [
{
id: 199199 // this is how I identify the parameter
size: 185 // this is what I want to change
}, ...
]
}, ...
]
}
}, ...
]
... and an array of changes to parameters I want to apply, for example: change size to 189 where product.specifications.attributes.parameters.id == 199199.
I'd like to do this without flattening any elements as they are part of a Vue.js data structure, it will break the reactivity.
How could I do this? I am open to using Underscore or lo-dash

This looks ugly, but it is effective:
To make it more dynamic, let's use variables: identifier will be your '199199' value and new_size for the '189' value.
methods: {
updateRecord: function(identifier, new_size) {
this.products.map(function(product) {
product.specifications.attributes.map(function(attribute) {
attribute.parameters.map(function(parameter) {
if (parameter.id == identifier) parameter.size = new_size;
})
});
});
}
}
Here is a working fiddle: https://jsfiddle.net/crabbly/eL7et9e8/

_.forEach(products, function(product) {
_.forEach(_.get(product, 'specifications.attributes', []), function(attribute) {
_.set(_.find(attribute.parameters, {id: 199199}), 'size', 189);
});
});

I believe what you want is underscore's findIndex() - http://underscorejs.org/#findIndex. Once you find which element in the array you want to apply the changes to (comparing the nested id to what you are looking for) you can then make the change to that particular element.

Converting datatype in Object from int to string

I have following 2 arrays of object. I want to convert the array from 1st format to 2nd format, i.e, data values stored from int to string, but unable to find a convinient way. Can someone help?
Please, help out with a way to do so easily by Javascript.

Try this:
The map() method creates a new array with the results of calling a provided function on every element in this array.
var test = [{
id: 0,
title: 0
}, {
id: 1,
title: 1
}, {
id: 2,
title: 2
}, {
id: 3,
title: 3
}];
var newArray = test.map(function(item) {
return {
id: item.id.toString(),
title: item.title.toString()
};
});
console.log(newArray);

Use map, for example:
tootSetArray.map(function(item){
return {
id: '' + item.id,
title: '' + item.title
};
});
The map() method creates a new array with the results of calling a
provided function on every element in this array.

Divide a Javascript Array and subarrays In 2 arrays

I have this array:
var myArray = [
{ familyName: 'one', subfamilies:
[ { subfamilyName: 'subOne', subItems:
[ { name: 'subOne', code: '1' },
{ name: 'subTwo', code: '2' }
] }
]
},
{ familyName: 'two', subfamilies:
[ { subfamilyName: 'subTwo', subItems:
[ { name: 'subOne', code: '1' },
{ name: 'subTwo', code: '2' },
{ name: 'subTwo', code: '3' }
] }
]
}
]
I need to divide that array in two diferent arrays with the same length if possible (my real array is so much longer), but I am having some problems getting it done. I create 2 blank array and, with for sentence read all the items. First I push the subItems in one blank array, but cannot get the way to create a new subFamily in a blank array variable and then push the sutItems array.
How can be this done?
Thanks a lot in advance.

var myOtherArray = myArray.splice(myArray.length / 2 | 0);