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Finding like values and appending items to array (javascript)

I have two arrays I'm trying to combine in a very specific way and I need a little guidance. Array1 is an array of dates 30-40 items, Array 2 is a list of objects with a date inside one of the attributes. I'm trying to append the object in array 2 to the index of array1 when the dates match.
I want to put arr2 in the same index as arr1 if the dates match.
const arr = [
"2022-06-26T07:00:00.000Z",
"2022-06-27T07:00:00.000Z",
"2022-06-28T07:00:00.000Z",
"2022-06-29T07:00:00.000Z",
"2022-06-30T07:00:00.000Z",
"2022-07-01T07:00:00.000Z",
"2022-07-02T07:00:00.000Z",
"2022-07-03T07:00:00.000Z",
"2022-07-04T07:00:00.000Z",
"2022-07-05T07:00:00.000Z",
"2022-07-06T07:00:00.000Z",
"2022-07-07T07:00:00.000Z",
"2022-07-08T07:00:00.000Z",
"2022-07-09T07:00:00.000Z",
"2022-07-10T07:00:00.000Z",
"2022-07-11T07:00:00.000Z",
"2022-07-12T07:00:00.000Z",
"2022-07-13T07:00:00.000Z",
"2022-07-14T07:00:00.000Z",
"2022-07-15T07:00:00.000Z",
"2022-07-16T07:00:00.000Z",
"2022-07-17T07:00:00.000Z",
"2022-07-18T07:00:00.000Z",
"2022-07-19T07:00:00.000Z",
"2022-07-20T07:00:00.000Z",
"2022-07-21T07:00:00.000Z",
"2022-07-22T07:00:00.000Z",
"2022-07-23T07:00:00.000Z",
"2022-07-24T07:00:00.000Z",
"2022-07-25T07:00:00.000Z",
"2022-07-26T07:00:00.000Z",
"2022-07-27T07:00:00.000Z",
"2022-07-28T07:00:00.000Z",
"2022-07-29T07:00:00.000Z",
"2022-07-30T07:00:00.000Z",
"2022-07-31T07:00:00.000Z",
"2022-08-01T07:00:00.000Z",
"2022-08-02T07:00:00.000Z",
"2022-08-03T07:00:00.000Z",
"2022-08-04T07:00:00.000Z",
"2022-08-05T07:00:00.000Z",
"2022-08-06T07:00:00.000Z"
]
const arr2 = [
{
"gsi1SK": "name ",
"searchPK": "thing",
"SK": "uuid",
"Desc": "place #1205",
"PK": "thing uuid",
"searchSK": "7/1/2022",
"gsi1PK": "thing",
"Complete": false,
"Users": [
"person1",
"person2"
]
},
{
"gsi1SK": "name",
"searchPK": "thing",
"SK": "uuid",
"Desc": "place#124124",
"PK": "thing uuid",
"searchSK": "7/4/2022",
"gsi1PK": "thing",
"Complete": false,
"Users": [
"person2",
"person45"
]
}
]
console.log([arr, arr2]);

You seem to have a handle on the date conversion part. Here I've defined two short sample arrays to represent arr2 and newArr. Then, a map function to create the output.
const arr2 = [
{
"OTHER_FIELDS": "TOP SECRET",
"searchSK":"7/4/2022"
},
{
"OTHER_FIELDS": "TOP SECRET",
"searchSK":"7/9/2022"
}
];
const newArr = [
[
"7/2/2022"
],
[
"7/3/2022"
],
[
"7/4/2022"
],
[
"7/5/2022"
],
[
"7/6/2022"
],
[
"7/7/2022"
],
[
"7/8/2022"
],
[
"7/9/2022"
],
[
"7/10/2022"
]
];
// for each subarray in newArr, return an array containing the existing element plus any elements from arr2 found by the filter function
const output = newArr.map(el => [...el, ...arr2.filter(a2 => a2.searchSK === el[0])]);
console.log(output);

Plan
You've got two obvious options:
A. Look at each of the objects, finding a home for each one in turn
B. Look at each of the dates, collecting all the objects that belong to it
Which method makes more sense for you will depend on other factors you haven't covered in your post. I think the main question is: is it guaranteed that the date list will contain a proper home for every object? If no, then do you want to drop the objects without proper homes, or do you want to create a proper home for the objects
Performance can also matter, but really only if you expect either list to be very long or if you need to run this process multiple times (such as in a React component in the browser).
Implement
Loop through the list you chose. For each item, scan the other list for the relevant item(s): its home or its children. Take the appropriate action for those items depending on which plan you chose.
Another consideration is: don't mutate your arguments. That means you probably need to create copies of the two input arrays before you do the work. If the arrays contain objects rather than scalars, you can't just do array.slice() to create a copy.
For an array of POJOs, you can convert the source to a string and then back again to create a clone.
The array of dates will need special handling, because JSON.parse will not revive dates.
Mutating arguments is generally a bad practice, at least in the functional paradigm that underlies many popular front-end frameworks today. Plus, if you create your own copies of the input data, you can gain efficiency by moving items from the source arrays to the output array, which means that subsequent iterations won't have to re-examine items that have already been processed.

What is the correct format of populating a JSON object with a nested array of objects?

I'm trying to create a JSON object with a nested array of JSON objects. What is the correct format of this?
Here is an example what I am trying to create:
{
"reviewCount": 96,
"reviews": [
{"name": "Sean Steinman", "date": "reviewed 2 weeks ago", "reviewContent": "Fantastic Service"},
{"name": "Ryan Lundell", "date": "reviewed in the last week", "reviewContent":"Ask for Scott!"}
]
}
Here is what I have so far:
var reviewObj = {
reviewCount: reviews.length,
reviews: [{name: , date: , reviewContent:}]
}
After I initialize it, I will fill it with a for loop that runs through an existing array of strings.
CLARIFICATION:
The array that I'm using to populate the JSON object is:
[
"\nSean Steinman\nreviewed 2 weeks ago\n Fantastic Service\n",
"\nRyan Lundell\nreviewed in the last week\n Ask for Scott!\n• • •\n"
]
So I'm creating a new array in my for with tmpArr = reviews[i].split('/n');, and then where I'm getting stuck is how to stick that into the JSON object as an object.

First, you're not building a "JSON" object. You're just building an object. It's not JSON until you JSON-encode it. {"name": "bob"} is not JSON, it's an object literal. '{"name": "bob"}', the string, is JSON.
Second, you cannot loop inside an object literal, which is what your second code example seems to indicate you're trying to do. Instead, you need to initialize you reviews property to an empty array, and then loop and append items to the array.
var reviews = [
"\nSean Steinman\nreviewed 2 weeks ago\n Fantastic Service\n",
"\nRyan Lundell\nreviewed in the last week\n Ask for Scott!\n• • •\n"
];
var reviewObj = {
reviewCount: reviews.length,
reviews: []
}
reviews.forEach(function(line) {
var review = line.split("\n");
reviewObj.reviews.push({name: review[0], date: review[1], reviewContent: review[2]});
});

Does angularjs automatically create nested structures?

a bit confused about how to create and reference items in a nested array using angular.js. I was thinking that I could do:
$scope.zones = [ {z:'north'}, {z:'south'} ];
$scope.zones.times = [ {t:'noon'}, {t:'midnight'} ];
$scope.zones.times.places = [ {p:'here'}, {p:'there'} ];
and angularjs would create a structure in which every zone has two times and every time has two places.
Then I could use something like:
<ul ng-repeat="zone in $scope.zones">
<li>{{zone.z}}</li>
<ul ng-repeat="time in zone.times">
<li>{{time.t}}</li>
<ul ng-repeat="place in time.places">
<li>{{place.p}}</li>
</ul>
</ul>
</ul>
to see the tree structure on my page.
So, does using the dot notation above actually create a nested array of objects? Should I be able to reference them "recursively" as in the directive above? I'm having trouble getting this to work beyond the first two levels.

You're not setting up your data correctly. It should be:
$scope.zones = [ {z:'north'}, {z:'south'} ];
$scope.zones[0].times = [ {t:'noon'}, {t:'midnight'} ];
$scope.zones[1].times = [ {t:'noon'}, {t:'midnight'} ];
Etc...
Then your HTML should work as expected.

In JavaScript using obj.propName accesses the property named propName of the object referenced by obj.
Arrays are also objects (in JavaScript), so these lines of code:
$scope.zones = [...];
$scope.zones.times = [...];
create an array (named zones) and give it a property named times (which is also an array).
Note: This is JavaScript-specific and has nothing to do with Angular.
This is not what you want. You want to give the times property to zones' items, not to zones itself. (Similarly with places.)
In order to achieve that, you need to iterate over the elements of each array and give it the extra properties.
var places = [{p: 'here'}, {p: 'there'}];
var times = [{t: 'noon'}, {t: 'midnight'}];
var zones = [{z: 'north'}, {z: 'south'}];
// Give each `time` a `places` property
times.forEach(function (time) {
time.places = places;
});
// Give each `zone` a `times` property
// (Each `time` already has a `places` property.)
zones.forEach(function (zone) {
zone.times = times;
});
// Assign the augmented `zones` to `$scope.zones`
$scope.zones = zones;
See, also, this short demo.
Note:
In the above implementation, values are passed by reference. This means that is you change $scope.zones[0].times[0].places[0], $scope.zones[1].times[1].places[0] will also be affected, since it references the same object.
This implementation is OK if you just want to read values, as it's more efficient.
If you want to be able to also modify the objects, then you need to create copies of the objects and not assign them by reference.
E.g., instead of time.places = places; and zone.times = times;
write time.places = angular.copy(places); and zone.times = angular.copy(times); respectively.
The resulting $scope.zones object will look liek this:
[{
"z": "north",
"times": [{
"t": "noon",
"places": [
{"p": "here" },
{"p": "there"}
]
}, {
"t": "midnight",
"places": [
{"p": "here" },
{"p": "there"}
]
}]
}, {
"z": "south",
"times": [{
"t": "noon",
"places": [
{"p": "here" },
{"p": "there"}
]
}, {
"t": "midnight",
"places": [
{"p":"here" },
{"p":"there"}
]
}]
}]
Note:
In your HTML code you reference $scope.zones. This is an error !
The corect way is: zones
(All Angular expressions are evaluated in the context of the current Scope, thus ng-repeat="zone in $scope.zones" will look for $scope.$scope.zones.)

How to create array from json in extjs for nested combobox

how to create array from json in extjs. Please find below json structure and the required array structure
"DepartmantCodes": [
{
"DepartmentCode": "12",
"DivisionCode": [
"11",
"22"
]
},
{
"DepartmentCode": "22",
"DivisionCode": [
"21",
"23"
]
}
]
Array structure
[
['12','11'],
['12','22'],
['22','21'],
['22','23'],
]

Using Ext.each and an empty array you can iterate through the json object and create the required array:
var endArray = [];
Ext.each(departmentCodes,function(departmentCode){
Ext.each(departmentCode.DivisionCode,function(divisionCode){
endArray.push([departmentCode.DepartmentCode,divisionCode]);
});
});
I've double nested the foreach in the example because, although your code has only 2 division codes in each array, I assume there could be any number of division codes?
Here is a fiddle for a working demonstration.

Javascript nested arrays

I am currently developing a website to do with cooking and will store recipes.
At the moment I am planning to store the recipes in a JS nested array. The array will contain all the recipes and then within each of the recipes will be another array containing all the ingredients for that recipe.
What would be the best way to structure this nested array?
Currently I have the following but I'm not entirely sure this is the best/correct way to do it...
Any help is much appreciated.
var recipes = [
{
name:"pizza",
ingredients: {
"tomato",
"cheese",
"meat"
}
}
]

I agree with #smakateer regarding associated array. However I would improve it a bit to:
var recipes = {
"pizza": {
"ingredients": ["tomato", "cheese", "meat" ], //or "ingredients": [ {"name":"tomato", "howMany": 3} ]
//thanks to this it will be easier extendable, i.e.
"description": "Some description",
imageUrl: URL
}
}
EDIT:
You'll probably have many receips for pizza, so you could store them in array of objects under one key.
...
"pizza": [ {...}, {...} ],
"dumplings": []
...

I would suggest moving the name to the top level of the array and switching it to an associated array of strings to arrays:
var recipes = {
"pizza": [
"tomato",
"cheese",
"meat"
]
}
Then you can call each recipe by name and get the iterable list of ingredients.