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I am trying to get an array of distinct values from the data structure below. I tried using reduce and object keys with no luck. What can I try next?
Data:
var data = [{
"id": 1,
"Technologies": ["SharePoint", "PowerApps"]
},
{
"id": 2,
"Technologies": ["SharePoint", "PowerApps", "SomethingElse"]
},
{
"id": 3,
"Technologies": ["SharePoint"]
},
{
"id": 4,
"Technologies": ["PowerApps"]
},
{
"id": 5,
"Technologies": null
}
]
Finished result should look like:
var distintValues = ["PowerApps", "SharePoint", "SomethingElse", null]
My attempt:
https://codepen.io/bkdigital/pen/MWEoLXv?editors=0012
You could use .flatMap() with a Set. .flatMap allows you to map each object's technology to one resulting array, and the Set allows you to remove the duplicates. With the help of optional chaining ?., you can also keep the null value (so it doesn't throw when accessing Technologies) like so:
const data = [{ "id": 1, "Technologies": ["SharePoint", "PowerApps"] }, { "id": 2, "Technologies": ["SharePoint", "PowerApps", "SomethingElse"] }, { "id": 3, "Technologies": ["SharePoint"] }, { "id": 4, "Technologies": ["PowerApps"] }, { "id": 5, "Technologies": null } ];
const res = [...new Set(data.flatMap(obj => obj?.Technologies))];
console.log(res);
[...new Set(
data
.map(v => Array.isArray(v.Technologies) ? v.Technologies : [v.Technologies])
.reduce((t, v) => [...t, ...v], [])
)];
I tried to solve this through JS. Here is my code:
const data = [{
"id": 1,
"Technologies": ["SharePoint", "PowerApps"]
}, {
"id": 2,
"Technologies": ["SharePoint", "PowerApps", "SomethingElse"]
}, {
"id": 3,
"Technologies": ["SharePoint"]
}, {
"id": 4,
"Technologies": ["PowerApps"]
}, {
"id": 5,
"Technologies": null
}]
const distintValues = [];
for (let element of data) {
if (element.Technologies != null) {
for (let elem of element.Technologies) {
if (!distintValues.includes(elem)) {
distintValues.push(elem);
}
}
}
}
console.log(distintValues);
In your attempt you tried to do it with reduce so here is how I would do it
var data = [{
"id": 1,
"Technologies": ["SharePoint", "PowerApps"]
},
{
"id": 2,
"Technologies": ["SharePoint", "PowerApps", "SomethingElse"]
},
{
"id": 3,
"Technologies": ["SharePoint"]
},
{
"id": 4,
"Technologies": ["PowerApps"]
},
{
"id": 5,
"Technologies": null
}
];
const objAsArray = Object.keys(data) // first we get the keys
.map(key => data[key]) // then we map them to their value
const technologyMap = objAsArray.reduce((acc, data) => {
// if the entry has technologies we set the key in the accumulation object to true
if (data.Technologies) {
data.Technologies.forEach(tech => acc[tech] = true)
}
return acc;
}, {})
// at the very end we get the keys of the accumulation object
const uniqueTechnologies =
Object.keys(
technologyMap
)
I have two arrays:
const array1 = [{
"id": "4521",
"name": "Tiruchirapalli",
"stateId": "101"
},
{
"id": "1850",
"name": "Tenkasi",
"stateId": "101"
},
{
"id": "202",
"name": "Thanjavur",
"stateId": "101"
},
{
"id": "505",
"name": "Ernakulam",
"stateId": "102"
},
];
And now array2
const array2 = [{
"id": 1850,
"cityName": "Tenkasi",
"aliasNames": [
"Thenkasi"
]
},
{
"id": 4521,
"cityName": "Tiruchirapalli",
"aliasNames": [
"Trichy"
]
},
{
"id": 202,
"cityName": "Thanjavur",
"aliasNames": [
"Tanjore"
]
},
{
"id": 505,
"cityName": "Ernakulam",
"aliasNames": [
"Kochi",
"Cochin"
]
},
];
what i need to do is, how to filter both the arrays at same time ( or filter first one and then second which ever one is performance effective ).
For instance, when user types "Kochi", first it should check on array1 to find if its has name="Kochi", if it has then we can set the state with that and if it doesnt have we need to find it on array2 and the update the state !
Which is fast and effective way to handle this - ( array1 has 2500 records and array2 has 990 records ) so performance / speed is also a concern
My attempt:
searchFilterFunction = text => {
this.setState({ typedText: text });
const newData = array1.filter(item => {
const itemData = `${item.name.toUpperCase()}`;
const textData = text.toUpperCase();
return itemData.indexOf(textData) > -1;
});
this.setState({ data: newData});
};
How to implement the second filter in optimized way ?
For instance, when user types "Kochi", first it should check on array1
to find if its has name="Kochi", if it has then we can set the state
with that and if it doesnt have we need to find it on array2 and the
update the state !
I would do something like this with Array.find.
if( array1.find(item=>item.name.toUpperCase() === text) ) {
// set state
} else if( array2.find(item=>item.cityName.toUpperCase() === text) ) {
// set state
}
A refined form would be
let result = array1.find(item=>item.name.toUpperCase() === text);
// check in array 2 as we cannot find in array 1
if(!result) {
result = array2.find(item=>{
// check in aliasNames and in cityName
return item.cityName.toUpperCase() === text || item.aliasNames.includes(text);
}
);
}
if(result) {
setState(result);
} else {
// place not found
}
Regarding the performance based on your array count you will not see much difference. If you want to save some milliseconds you can check the array with least count first as mentioned in one of the comments. But the time also varies based on were the element is in array.
I think this is the most optimal solution because nesting the two filter won't work as you need to filter from first array and then second.
const array1 = [{
"id": "4521",
"name": "Tiruchirapalli",
"stateId": "101"
},
{
"id": "1850",
"name": "Tenkasi",
"stateId": "101"
},
{
"id": "202",
"name": "Thanjavur",
"stateId": "101"
},
{
"id": "505",
"name": "Ernakulam",
"stateId": "102"
},
];
const array2 = [{ "id": 1850, "cityName": "Tenkasi",
"aliasNames": [
"Thenkasi"
]
},{"id": 4521,"cityName": "Tiruchirapalli",
"aliasNames": [
"Trichy"
]
},
{
"id": 202,
"cityName": "Thanjavur",
"aliasNames": [
"Tanjore"
]
},
{
"id": 505,
"cityName": "Ernakulam",
"aliasNames": [
"Kochi",
"Cochin"
]
},
];
function filter(text) {
// Complexity Linear
const filter_array = array1.filter((a) => {
return (a.name === text)
});
if (filter_array.length > 0) {
//Set State and return
}
//Complexity Linear and includes complexity Linear O(sq(m*n)) where n is //the aliasName record
const filter_array2 = array2.filter((a) => {
return a.cityName === text || a.aliasNames.includes(text);
});
return filter_array2 //Set State filter array 2
}
console.log(filter("Kochi"));
This question is based on the question:
How to change a property of an object in Vue?
render() {
const hash = {};
this.orders.forEach(o => {
hash[o.supplier_name] = hash[o.supplier_name] + 1 || 1;
})
const suppliers = Object.keys(hash).map(name => ({ name: name, num: hash[name] }))
console.log(suppliers);
}
Each order has n items. Each item has a quantity.
[
{
"id": "54410f9d-b84a-4537-bc97-c312564f2a0d",
"part_name": "1234",
"part_number": "12345",
"unit": "Stk.",
"delivery_date": "13.01.2021",
"supplier_id": "b3f2cced-1f61-48c2-9d30-ac7b09257a75",
"supplier_name": "CNC AG",
"supplier_stock": null,
"confirmed": "2021-01-13T14:30:59.000000Z",
"created_at": "13.01.2021",
"confirmed_at": "13.01.2021 15:30",
"confirmed_from": "John Doe",
"time_to_confirm": 1.33,
"delivery_time": null,
"road_time": null,
"items" : [
{
"id": "54410f9d-b84a-4537-bc97-c3125ds4f2a0d",
"quantity": 5,
},
{
"id": "54410f9d-b84a-4537-bc97-cd12564f2a0d",
"quantity": 4,
}
]
}
]
Finally, I like to have:
{ name: <supplier name>, num: <number of orders>, numItems: <total number of items>, quantity: <total quantity of quantity in items>, averageNumItems: <average of items per order> }
How can i get the final object?
I have an object response here
result.joblist = {
"collection_job_status_list": [
{
"application_context": {
"application_id": "a4",
"context_id": "c4"
},
"creation_time": "15699018476102",
"progress": 100,
"status": "READY",
"phase": "ACTIVE",
"job_error": {}
},
{
"application_context": {
"application_id": "a6",
"context_id": "c6"
},
"creation_time": "15698648632523",
"progress": 100,
"status": "READY",
"phase": "ACTIVE",
"job_error": {}
}
],
"result": {
"request_result": "ACCEPTED",
"error": {}
}
}
Need to get rid of {"application_context": & ending } here, just need application_id":"a4","context_id":"c4" at the same level.
I have tried something like this, but not able to move ahead.
var newObj: any = {};
if (allJobs && allJobs.length > 0) {
// this.rowData = this.allJobs;
// this.allJobs = this.allJobs['application_id'];
//let ele:object = allJobs.application_context;
allJobs.forEach(ele => {
newObj = {
application_id: ele.application_context.application_id,
context_id: ele.application_context.application_context
};
return newObj;
});
}
You can use map and destructuring
Get the collection_job_status_list from result
Loop over the values take out the required values from application_context key and merge with remaining values
Build the same structure as original result
let result = {"collection_job_status_list": [{"application_context": {"application_id": "a4","context_id": "c4"},"creation_time": "15699018476102","progress": 100,"status": "READY","phase": "ACTIVE","job_error": {}},{"application_context": {"application_id": "a6","context_id": "c6"},"creation_time": "15698648632523","progress": 100,"status": "READY","phase": "ACTIVE","job_error": {}}],"result": {"request_result": "ACCEPTED","error": {}}}
let { collection_job_status_list, ...rest } = result
let modified = collection_job_status_list.map(({
application_context: {
application_id,
context_id
},
...rest
}) => ({ ...rest, context_id, application_id}))
let final = {
collection_job_status_list: modified,
...rest
}
console.log(final)
What you need here is a map. Reference: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map
Try modifying the code as below and you should have your expected output.
var newObj: any = {};
var newArray;
if (allJobs && allJobs.length > 0) {
newArray = allJobs.map(ele => {
newObj = {
application_id: ele.application_context.application_id,
context_id: ele.application_context.application_context
};
return newObj;
});
}
Hope this helps :)
You need to use the map function
const result = {};
result.joblist = {
"collection_job_status_list": [
{
"application_context": {
"application_id": "a4",
"context_id": "c4"
},
"creation_time": "15699018476102",
"progress": 100,
"status": "READY",
"phase": "ACTIVE",
"job_error": {}
},
{
"application_context": {
"application_id": "a6",
"context_id": "c6"
},
"creation_time": "15698648632523",
"progress": 100,
"status": "READY",
"phase": "ACTIVE",
"job_error": {}
}
],
"result": {
"request_result": "ACCEPTED",
"error": {}
}
}
result.joblist.collection_job_status_list = result.joblist.collection_job_status_list.map(item => {
return {
"application_id": item.application_context.application_id,
"context_id": item.application_context.context_id
}
})
console.log(result)
Or you can use map function along with shorthand es6 syntaxes
const result = {};
result.joblist = {
"collection_job_status_list": [
{
"application_context": {
"application_id": "a4",
"context_id": "c4"
},
"creation_time": "15699018476102",
"progress": 100,
"status": "READY",
"phase": "ACTIVE",
"job_error": {}
},
{
"application_context": {
"application_id": "a6",
"context_id": "c6"
},
"creation_time": "15698648632523",
"progress": 100,
"status": "READY",
"phase": "ACTIVE",
"job_error": {}
}
],
"result": {
"request_result": "ACCEPTED",
"error": {}
}
}
result.joblist.collection_job_status_list = result.joblist.collection_job_status_list.map(({application_context}) => {
return {
...application_context
}
})
console.log(result)
EDIT:
The things you want to keep in your array depends on what you are returning from the map. You return the keys you want to keep. So if you want other items.
If you have an array A
A = [
{
nest: {
x: 1,
y: 1,
},
key1: 5,
key2: 7,
},
{
nest: {
x: 1,
y: 1,
},
key1: 5,
key2: 7,
},
{
nest: {
x: 1,
y: 1,
},
key1: 5,
key2: 7,
}
]
Let us assume you want x from nest, key1 and key2 in your final output. You will then do
const finalOutput = A.map(item => {
return {
x: item.nest.x, // x from nest
key1: item.key1, // key1
key2: item.key2, // key2
}
})
But there are shorthand forms for doing this. Let's assume that the item we get in our map function is already divided into a nest and a rest variable. The nest contains item.nest and the rest is {key1: 5,key2:7}, then you can simply return x from nest and everything else from rest
const finalOutput = A.map(({nest, ...rest}) => {
return {
x: nest.x, // x from nest
...rest, // everything else
}
})
I have modal, inside the modal there is a form when i click the submit button it will do this.
jquery code:
$('#add-new-content-form').on('submit', e => {
e.preventDefault();
//I want to add this block dates to the data
let blockdates = $("#block-dates").val();
let title = $("#card-title").val();
let catalogId = $("#catalog").val();
let categoryId = $("#category").val();
let subcategoryId = $('#subcategory').val();
let why = $("#why").val();
let description = $('#card-description').val();
let cancellationPolicy = $('#cancellation-policy').val();
let displayPrice = $('#display-price').val();
let displayDiscounted = $('#discounted-price').val();
let displayMaxPax = $('#display-maxpax').val();
let data = {
"blockDates":[
{
"description": "national araw ng mga puso day!",
"notAvailableDate": "2019-02-14 10:00:00"
},
{
"description": "chinese new year!",
"notAvailableDate": "2019-02-25 10:00:00"
}
],
"title": title,
"catalogId": catalogId,
"categoryId": categoryId,
"subcategoryId": subcategoryId,
"why": why,
"description": description,
"cancellationPolicy": cancellationPolicy,
"displayPrice": displayPrice,
"displayDiscounted": displayDiscounted,
"displayMaxPax": displayMaxPax
};
let content = ajax("api/unitContents", JSON.stringify(data), "POST");
// window.location.replace("/category");
});
Now, in the postman there is something just like this:
{
"blockDates":[
{
"description": "national araw ng mga puso day!",
"notAvailableDate": "2019-02-14 10:00:00"
},
{
"description": "chinese new year!",
"notAvailableDate": "2019-02-25 10:00:00"
}
],
"location":{
"identifier":"UBZ190asas11",
"name": "abulalas,purok 4",
"address" : "abulalas1 hagonoy bulacan",
"lat" : 12141.00,
"lng" : 123251.00
},
"units": 2,
"title": "sample unit content",
"catalogId": 6,
"categoryId": 22,
"subcategoryId": 13,
"contentOptions": [
{
"name":"bannana boat",
"maxPax":8,
"isAvailableDayTime":[
9,10,11,12,13,15,16,17,18,
33,34,35,36,37,39,38,39,40,
56,57,58,59,60,62,63,64,65,
80,81,82,83,84,86,87,88,89,
104,105,106,107,108,110,111,112,113,
128,129,130,131,132,134,135,136,137,
152,153,154,155,156,158,159,160,161
],
"inventoryNeededSet":[
{
"inventoryId": 1,
"count":1
},
{
"inventoryId": 1,
"count":2
}
],
"paxPrices": [
{
"count": 5,
"pricePerPax": 200,
"totalPrice": 1000,
"fee": 100
},
{
"count": 1,
"pricePerPax": 200,
"totalPrice": 200,
"fee": 10
}
]
},
{
"name":"bannana with island tour",
"maxPax":10,
"isAvailableDayTime":[
9,10,11,12,13,15,16,17,18,
33,34,35,36,37,39,38,39,40,
56,57,58,59,60,62,63,64,65,
80,81,82,83,84,86,87,88,89,
104,105,106,107,108,110,111,112,113,
128,129,130,131,132,134,135,136,137,
152,153,154,155,156,158,159,160,161
],
"inventoryNeededSet":[
{
"inventoryId": 1,
"count":2
},
{
"inventoryId": 1,
"count":2
}
],
"paxPrices": [
{
"count": 5,
"pricePerPax": 200,
"totalPrice": 1000,
"fee": 100
},
{
"count": 1,
"pricePerPax": 200,
"totalPrice": 200,
"fee": 10
}
]
}
],
"photos": [
"https://samplephoto1.com",
"https://samplephoto2.com",
"https://samplephoto3.com"
],
"videos": [
"https://samplevid1.com",
"https://samplevid2.com",
"https://samplevid3.com"
],
"why": "sample why",
"description": "sample desc",
"cancellationPolicy":"cancellationPolicy",
"displayPrice": 300,
"displayDiscounted": 250,
"displayMaxPax": 2
}
the thing is, I want to save the blockdate, what is the syntax of inserting the blockdates?
=======================UPDATED======================
Try this before stringifying the data variable:
data.blockdates = $("#block-dates").val();
To execute your code jQuery is needed. Try after inserting <script src='https://code.jquery.com/jquery-3.3.1.min.js'></script> before your code.
If you have let blockdates = $("#block-dates").val();
You can append blockdates into data like this
data['blockdates']=blockdates;
You may need to keep the elements in an object first. You can then add them to the array.
blockDates= [];
var description = $("#card-description").val();
var notAvailableDate = $("##block-dates").val();
var blockdate = {description, notAvailableDate};
blockDates.push(blockdate);
in this way => let content = ajax("api/unitContents", JSON.stringify(data, blockDates), "POST");
or
let data = {
"title": title,
"catalogId": catalogId,
"categoryId": categoryId,
"subcategoryId": subcategoryId,
"why": why,
"cancellationPolicy": cancellationPolicy,
"displayPrice": displayPrice,
"displayDiscounted": displayDiscounted,
"displayMaxPax": displayMaxPax,
"blockDates": blockDates
};
in this way => `let content = ajax("api/unitContents", JSON.stringify(data), "POST");`