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How to get values from nested array of objects - React JS

I am trying to the values from my data.json which consists of array of objects. I am trying to get the values by using map method on json data. My Json dat structure is like Array->Object->Array-Object([{[{}]}]). This is how the data is structured in Json. I have written down the Json data and logic to get the values down. Whenever I am trying to get the values from (inner array of object) I am ending up with undefined. Any one could assist me how to resolve this issue. Thanks in advance!
[
{
"key": "row-0",
"cells": [
{
"key": "cell-0",
"id": "ID-0",
"headerName": "Name",
"CustomerName": "ABC"
},
{
"key": "cell-1",
"id": "ID-1",
"headerName": "RegID",
"CustomerID": "P-01"
},
{
"key": "cell-2",
"id": "ID-2",
"headerName": "Detail",
"Deatil": "Abc"
}
]
},
{
"key": "row-1",
"cells": [
{
"key": "cell-1",
"id": "ID-1",
"headerName": "Name",
"CustomerName": "CDE"
},
{
"key": "cell-2",
"id": "ID-2",
"headerName": "RegID",
"CustomerID": "P-02"
},
{
"key": "cell-3",
"id": "ID-3",
"headerName": "Detail",
"Deatil": "CDE"
}
]
}
]
//Logic
{mockData.map((values, index) => {
console.log("VALUES", values);
return values.cells.map(({ headerName, ...rest }) => {
console.log("JSON", JSON.stringify(rest));
console.log("REST", rest.CustomerName);---> getting undefined(I tried many approach everything is giving me undefined)
});
})}

I have created an example for you
As mentioned in the above comment.. elements without customerName will give undefined.
let mockData = [{
"key": "row-0",
"cells": [{
"key": "cell-0",
"id": "ID-0",
"headerName": "Name",
"CustomerName": "ABC"
},
{
"key": "cell-1",
"id": "ID-1",
"headerName": "RegID",
"CustomerID": "P-01"
},
{
"key": "cell-2",
"id": "ID-2",
"headerName": "Detail",
"Deatil": "Abc"
}
]
},
{
"key": "row-1",
"cells": [{
"key": "cell-1",
"id": "ID-1",
"headerName": "Name",
"CustomerName": "CDE"
},
{
"key": "cell-2",
"id": "ID-2",
"headerName": "RegID",
"CustomerID": "P-02"
},
{
"key": "cell-3",
"id": "ID-3",
"headerName": "Detail",
"Deatil": "CDE"
}
]
}
];
mockData.map((values, index) => {
console.log("VALUES", values);
return values.cells.map(({
headerName,
...rest
}) => {
console.log("JSON",rest);
console.log("Key:", rest.key);
console.log("ID:", rest.id);
console.log("CustomerName:", rest.CustomerName ? rest.CustomerName : 'NA' );
});
})

Look up values in an array using looping forEach Google Apps Script Javascript

I have an object that looks like the following {key: id numbers}
var obj = {
"c4ecb": {id: [3]},
"a4269": {id: [34,36]},
"d76fa": {id: [54,55,60,61]},
"58cb5": {id: [67]}
}
How do I loop each above id in the following array, and return the label?
var response =
{
"success": true,
"data": [
{
"key": "c4ecb",
"name": "fruits",
"options": [
{
"label": "strawberry",
"id": 3
},
{
"label": "apple",
"id": 4
},
{
"label": "pineapple",
"id": 5
},
{
"label": "Other",
"id": 31
}
],
}
]
},
{
"success": true,
"data": [
{
"key": "a4269",
"name": "vegetables",
"options": [
{
"label": "lettuce",
"id": 34
},
{
"label": "cucumber",
"id": 35
},
{
"label": "radish",
"id": 36
}
],
}
]
},
{
"success": true,
"data": [
{
"key": "d76fa",
"name": "pasta",
"options": [
{
"label": "spaghetti",
"id": 54
},
{
"label": "rigatoni",
"id": 55
},
{
"label": "linguine",
"id": 56
},
{
"label": "lasagna",
"id": 60
},
{
"label": "fettuccine",
"id": 61
}
],
}
]
}
Finally, what I want to do is look up the key and return a string of id values.
For example, input c4ecb and output strawberry. Input a4269 and output lettuce, radish. Input d76fa and output "spaghetti, rigatoni, lasagna, fettuccine"
I think to join the multiple labels output into one string I could use something like
array.data.vegetables.map(vegetables => vegetables.value).join(', ')].toString();
So in the end I want to have something like
var fruits = [some code that outputs "strawberry"];
var vegetables = [some code that outputs "lettuce, radish"];
var pasta = [some code that outputs "spaghetti, rigatoni, lasagna, fettuccine"];
What I've tried so far:
The following loop will return the id only if there is one id to be called for: e.g. only in case one where {id: 3} but returns null in cases like {id: 34,36} (because it's looking for '34,36' in id, which doesn't exist - I need to look for each one individually.
response.data.forEach(({key, options}) => {
if (obj[key]) {
options.forEach(({id, label}) => {
if (id == obj[key].id) obj[key].label = label;
});
}
});
console.log(obj)

Filter the response object to focus on the category that matches the id.
Map over the options array and select the items which appear in obj[id].
Finally convert the filtered results to a string.
See filteredLabelsAsString() function below for implementation.
var obj = {
"c4ecb": {"id": [3]},
"a4269": {"id": [34,36]},
"d76fa": {"id": [54,55,60,61]},
"58cb5": {"id": [67]}
}
var response =
[{
"success": true,
"data": [
{
"key": "c4ecb",
"name": "fruits",
"options": [
{
"label": "strawberry",
"id": 3
},
{
"label": "apple",
"id": 4
},
{
"label": "pineapple",
"id": 5
},
{
"label": "Other",
"id": 31
}
],
}
]
},
{
"success": true,
"data": [
{
"key": "a4269",
"name": "vegetables",
"options": [
{
"label": "lettuce",
"id": 34
},
{
"label": "cucumber",
"id": 35
},
{
"label": "radish",
"id": 36
}
],
}
]
},
{
"success": true,
"data": [
{
"key": "d76fa",
"name": "pasta",
"options": [
{
"label": "spaghetti",
"id": 54
},
{
"label": "rigatoni",
"id": 55
},
{
"label": "linguine",
"id": 56
},
{
"label": "lasagna",
"id": 60
},
{
"label": "fettuccine",
"id": 61
}
],
}
]
}];
function filteredLabelsAsString(obj_key, obj, content=response) {
// sanity check: obj must contain obj_key
if (Object.keys(obj).includes(obj_key)) {
return content.filter((item) => {
// filter content using value of obj_key
return item.data[0].key == obj_key;
}).map((item) => {
// item : { success: true, data: [] }
// map over options array
return item.data[0].options.map((opt) => {
// option : {id, label}
// return the label if the id is in the obj object's list
if (obj[item.data[0].key].id.includes(opt.id))
return opt.label;
}).filter((label) => {
// filter out empty items
return label !== undefined;
});
}).join(",");
}
// if obj does not contain obj_key return empty string
return "";
}
console.log("fruits: " + filteredLabelsAsString("c4ecb", obj));
console.log("vegetables: " + filteredLabelsAsString("a4269", obj));
console.log("pasta: " + filteredLabelsAsString("d76fa", obj));

Need help formatting array in JavaScript

I have a JavaScript array with the following format:
[
{
"header": true,
"id": "0",
"name": "dairy",
},
{
"category": "dairy",
"header": false,
"id": "-LSlje6ESGALGpckMhb7",
"name": "milk",
},
{
"category": "dairy",
"header": false,
"id": "-LSm9EpFg5DhW036aUle",
"name": "cheese",
},
{
"header": true,
"id": "3",
"name": "dessert",
},
{
"category": "dessert",
"header": false,
"id": "-LSm9MLZkrnvtPySw5U6",
"name": "cake",
},
{
"category": "dessert",
"header": false,
"id": "-LSmAQ0rdDLrpz0TSPuD",
"name": "pie",
},
{
"header": true,
"id": "6",
"name": "fruit",
},
{
"category": "fruit",
"header": false,
"id": "-LSlazVIGAKLakxAIa8G",
"name": "apple",
},
{
"category": "fruit",
"header": false,
"id": "-LSlb5GH6xZz-DpNVS22",
"name": "pear",
},
{
"category": "fruit",
"header": false,
"id": "-LSwWJldY1nxQrotyv-V",
"name": "strawberry",
},
{
"header": true,
"id": "10",
"name": "meat",
},
{
"category": "meat",
"header": false,
"id": "-LSljXQzfXthJbOA54Ah",
"name": "fish",
},
{
"category": "meat",
"header": false,
"id": "-LSmA2-R9pOY8abAUyST",
"name": "steak",
},
{
"category": "meat",
"header": false,
"id": "-LSmAJ4J4gIfVQ8sgPDa",
"name": "pork",
},
]
What I am trying to do, is map through this array, and transform it to the following format:
[
{
title: nameOfFirstHeader,
data: items.slice(indexOfFirstHeader, indexOfSecondHeader),
},
{
title: nameOfSecondHeader,
data: items.slice(indexOfSecondHeader, indexOfThirdHeader),
},
{
title: nameOfThirdHeader,
data: items.slice(indexOfThirdHeader, indexOfFourthHeader),
},...and so on
]
So basically there will be an object section for each 'header' that is found in the original array. Each object section data property will contain the items found between the first header and the second header, and so on, until there are no more headers. I really can't wrap my head around how I can do this. Here is a reference to the the module I am using: https://github.com/saleel/react-native-super-grid#sectiongrid-example
Thanks!

I think this may be what you're trying to accomplish...
var grouped = items.reduce((acc,obj)=>{
let {header, name} = obj;
if (header) return [...acc, { title:name, data:[] }] // either first matching header or new match. Add fresh 'header' object
if (!acc.length) return acc; //not header and none have passed. Do nothing
let allButLast = acc.slice(0, acc.length-1),
lastElem = acc[acc.length-1]; // not a header, but there is an existing match. Add it to last match's data array
return [
...allButLast,
{
...lastElem,
data:[...lastElem.data, obj]
}
]
},[])
but it seems unreliable to trust the order of an array for this purpose. It would probably be more reliable to match by isHeader.name === notHeader.category to be less presumptive about the order of data you're iterating over. Like this...
var grouped = items.reduce((acc,obj)=>{
let {header, name, category} = obj;
if (header) return [...acc, { title:name, data:[] }];
if (!acc.length) return acc;
return acc.map((elem)=>{
if (elem.title !== category) return elem;
return {
...elem,
data: [ ...elem.data, obj]
};
})
},[])

I think you can probably do something like
const data = [];
let activeIndexForData = -1;
for(let i = 0; i < dataToSort.length -1; i++) {
if(dataToSort[i].header) {
activeIndexForData++;
}
if(data.length < activeIndexForData - 1) {
data.push({ title: dataToSort[i].name, data# []})
}
else {
data[activeIndexForData].data.push({ title: dataToSort[i].name, data: [])
}
}

How to get the corresponding value from two objects

I have first data object which has a list of cafe, and second data object which has a list of cafe types.
I need find, get and display the corresponding type value from first data object and ID value from second data object.
For example: in list of cafe, I have Pinta with "type" : "3", it means that 3 is Bar from second object.
First object:
{
"list": {
"item": [
{
"ID": "31",
"name": "Staut",
"type": "1",
},
{
"ID": "34",
"name": "Pinta",
"type": "3",
}
]
}
}
And second object:
{
"list": {
"item": [
{
"ID": "1",
"name": "Restaurant",
},
{
"ID": "2",
"name": "Cafe",
},
{
"ID": "3",
"name": "Bar",
}
]
}
}
I can do it with Lodash. It is right, but I can't display it and it uses high memory.
getValues: function() {
_.forEach(CafeJSON.list.item, function(cafeValue) {
_.forEach(TypeJSON.list.item, function(typeValue){
if (cafeValue.type == typeValue.ID) {
console.log("Cafe name is: ", cafeValue.name, "and type is: ", typeValue.name)
}
})
})
}
Result:

I'd simplify the types object down to a object having key value pairs in the form of '3': 'Bar', then loop the items once, overriding the type property's value.
let list = {
"list": {
"item": [{
"ID": "31",
"name": "Staut",
"type": "1",
},
{
"ID": "34",
"name": "Pinta",
"type": "3",
}
]
}
}
let types = {
"list": {
"item": [{
"ID": "1",
"name": "Restaurant",
},
{
"ID": "2",
"name": "Cafe",
},
{
"ID": "3",
"name": "Bar",
}
]
}
}
let typesSimplified = types.list.item.reduce((a, b) => {
a[b.ID] = b.name;
return a;
}, {});
list.list.item.forEach(e => {
e.type = typesSimplified[e.type];
});
console.log(list);

Validating arrays in an object of arrays in Javascript

I have a query object that looks like this
{
"regions": [],
"countries": [],
"channels": [],
"partners": [],
"branches": [],
"agents": []
}
After populating the arrays in the object it looks like this.
{
"regions": [{
"key": "101",
"value": "Middle East(XX)"
}],
"countries": [],
"channels": [],
"partners": [{
"key": "201",
"value": "Partner A"
}, {
"key": "202",
"value": "Partner B"
}],
"branches": [{
"key": "401",
"value": "Bangalore"
}, {
"key": "402",
"value": "Chennai"
}],
"agents": [{
"key": "501",
"value": "IBM - Metlife"
}]
}
I'm trying to loop through each of these arrays and determine if I should show the filter component. If any of the arrays in the object holds value, I should be showing the filter component
The code:
case false:
let itemsInQuery = 0;
Object.keys(query).forEach((item) => {
itemsInQuery = query[item].length ? itemsInQuery++ : itemsInQuery;
})
itemsInQuery ? this.setState({showBubbles: true, query}) : this.setState({showBubbles: false, query})
break;
I'm not sure what is wrong here, but itemsInQuery is always zero. Also, is there a better way to do this?
Thank you in advance!

If any of the array have items in, you want a boolean to be true?
This sounds like a case for .some which on an array will take a predicate and return true if any item in that array matches the predicate.
const shouldShow = Object.keys(data).some(key => data[key].length > 0)
https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Array/some

The problem is with this:
itemsInQuery = query[item].length ? itemsInQuery++
The ++ postfix operator returns the current value of itemsInQuery to the rest of the expression (i.e. 0) and then increments that variable to 1. But this is nullified by the assignment that happens afterwards to itemsInQuery which is the value 0.
So don't use ++ in an expression.
You can use this += instead:
itemsInQuery += query[item].length ? 1 : 0;

Does this do what you want?
var data1 = {
"regions": [{
"key": "101",
"value": "Middle East(XX)"
}],
"countries": [],
"channels": [],
"partners": [{
"key": "201",
"value": "Partner A"
}, {
"key": "202",
"value": "Partner B"
}],
"branches": [{
"key": "401",
"value": "Bangalore"
}, {
"key": "402",
"value": "Chennai"
}],
"agents": [{
"key": "501",
"value": "IBM - Metlife"
}]
};
var data2 = {
"regions": [],
"countries": [],
"channels": [],
"partners": [],
"branches": [],
"agents": []
}
function hasEntries (data) {
for (var index in data) {
if (Array.isArray(data[index]) && data[index].length) {
return true;
}
}
return false;
}
console.log(hasEntries(data1));
console.log(hasEntries(data2));