so I am trying to make an app that has two search criterias. The front-end app basically fetches data and you have two search bars to filter out the incoming data.
One search is by name and the other is by school name, the tricky part is that the either of the search also takes into account if there is some value in the other search parameter.
For example, if you search for "California University" and "Bob", you should get only Bobs that go to California University to render on the screen. But it seems like right now my DOM only renders the most recent search Ive made. What is the best way to go about a filter that filters both student name and school name using an event listener (keyup) on the search inputs?
searchByNameInput.addEventListener("keyup", (e) => {
const filterNameArray = studentArray.filter((student) => {
// code here to filter students with this name and render it on DOM
}
}
searchBySchoolName.addEventListener("keyup", (e) => {
//filters students who go to this school and render it on DOM
}
}
Write a single filtering function that checks both inputs, and call it from both event listeners.
function filterStudents() {
const nameFilter = searchByNameInput.value;
const schoolFilter = searchBySchoolName.value;
const filterArray = studentArray.filter(student =>
(nameFilter == '' || student.name.includes(nameFilter) &&
(schoolFilter == '' || student.school.includes(schoolFilter))
}
searchByNameInput.addEventListener("keyup", filterStudents);
searchBySchoolNameInput.addEventListener("keyup", filterStudents);
first filter your object and please try it include() method instead of filter().
as a above example
here filterData is my new filtered object and stu_data is my array.
get all search value from search input.
Example:-
var filterData = stu_data.filter((stu_filter) => {
return (stu_filter.firstname.toLowerCase().includes(filter) ||
stu_filter.lastname.toLowerCase().includes(filter))})
I hope this is help for you!
happy coding :)
Related
There is a product page in the store. The goods are gift card codes. Each has its own price. Cards are bought using a form with buttons for card denominations (each has its own price), which is almost completely unrelated to the product page (the form is in a pop-up, called by clicking on the button), and product cards appeared as a bonus, they were not originally planned. But since there is such a thing, it is necessary to adjust it. The essence of the task is that when you click on the popup call in the form, the button of the required card denomination is clicked. So that the parameters in the form change accordingly. I thought to cling to the url of the product page (in the url there is something like nominal-4000). But I don’t know how to make a comparison so that part of this url is compared with an array of buttons that also have the same class (of type nominal-4000). Here's what I was able to do:
const popupBtn = document.querySelector('.popup-btn');
pb.addEventListener('click', (e) => {
e.preventDefault();
document.body.classList.add('popup-open');
let nominal4000 = document.querySelector('.nominal-4000');
let field = 'nominal-4000';
if(window.location.href.indexOf(field) > -1) {
nominals.forEach(nominal => {
nominal.classList.remove('active-nominal');
if (nominal.classList.contains(field) ) {
nominal4000.click();
nominal4000.classList.add('active-nominal');
}
})
}
Here I'm just looking for the button and the url part of the page by nominal-4000. Works. But there will be 10 total products, and therefore pages and, consequently, buttons. That is, an array is needed. And their comparison, or something else. I have not delved into such wilds of JS yet, I cannot understand what and how. Use for example an array with denominations (they are also part of the url):
var fields = [
'nominal-3000',
'nominal-4000',
'nominal-5000'
];
Then an array with button classes, something like this -
var nominals = document.querySelectorAll(`${fields}`);
Here is a comparison of two arrays
let isFounded = fields.some( ai => nominals.includes(ai) );
But it doesn't all work together. Who fumbles in arrays, help please
Try this
const popupBtn = document.querySelector('.popup-btn');
popupBtn.addEventListener('click', (e) => {
e.preventDefault();
document.body.classList.add('popup-open');
var fields = [
'nominal-3000',
'nominal-4000',
'nominal-5000'
];
var nominals = document.querySelectorAll(`.${fields.join(', .')}`);
fields.forEach(field => {
if(window.location.href.indexOf(field) > -1) {
nominals.forEach(nominal => {
nominal.classList.remove('active-nominal');
if (nominal.classList.contains(field) ) {
nominal.click();
nominal.classList.add('active-nominal');
}
})
}
});
});
I have an array of available users that can be invited and also another array with all joined users to the particular chat. I need to check which of the available users have joined the chat and should be listed elsewhere.
Finally, I want to get an array with only the available users who have not joined the chat.
let availablеUsers = [{id:1,name:'Dani'}, {id:2,name:'Ani'}, {id:3,name:'Marta'}]
let allUsers = [{id:2,name:'Ani'},{id:10,name:'John'}, {id:3,name:'Marta'}]
The first thing I try to do is find those who are already participating in the chat:
let joinedUsers = availablеUsers.map((user) => {
return allUsers?.find((u) => u.id === user.id);
});
And i get this : [undefined, {… Аni}, {… Marta}]
Then I try to filter the array of available users so that I remove from it those that are in the newly created array and here's the problem I don't know how to do this :/
My idea is something like that:
availablеUsers = availablеUsers.filter((user) => {
//HERE I don't know what logic to write
return joinedUsers?.map((m) => m?.id !== user.id); // this doesn't work, just an example
});
My goal is to have only those users not contained in the other remain in the availableUsers array.
In the example I have given at the end in the array should remain only {id:1,name:'Dani'}
I welcome any suggestions. If it can do it with chaining, without the extra variable for joinedUsers it would be even better!
There's no need for joinedUsers. Just use find() or some() in the filter() callback, and invert the test.
availableUsers = availableUsers.filter(user => !allUsers.some(u => u.id == user.id))
if users are uniquely identified by id you can use just a filter with a Set of known users:
let availablеUsers = [{id:1,name:'Dani'}, {id:2,name:'Ani'}, {id:3,name:'Marta'}]
let allUsers = [{id:2,name:'Ani'},{id:10,name:'John'}, {id:3,name:'Marta'}]
let joinedUsers = availablеUsers.filter(
function ({id}) {
return this.has(id);
},
new Set(allUsers.map(({id}) => id))
);
Accordingly, you can use the same to update availablеUsers in one go:
availablеUsers = availablеUsers.filter(
function ({id}) {
return !this.has(id);
},
new Set(allUsers.map(({id}) => id))
);
it's not super clear why or when you need !== vs === but the concept is: use a set and use filter instead of map when you want to filter + a Set works harder while constructed but it's blazing fast while used via has()
The goal is to filter an array based on the slots the user has selected.
For example an array has slots for 7pm-9pm,10pm-12pm and so on.
Now the user selects 7pm-9pm, so now I want to filter the array which have 7ppm-9pm or is the users wants
7pm-9pm and 10pm-11pm so the data should be based on 7pm-9pm and 10pm-11pm
Here is how I store the values
This is the original array
data :[
{
name:"something",
phone:"another",
extraDetails : {
// some more data
slots : [
{item:"6PM-7PM"},
{item:"7PM-8pm}
]
}
},{
// Similarly more array with similar data but somewhere slots might be null
}
]
Now for example we have this array
slots:[{6PM-7PM,9PM-10PM,11PM-12AM}]
Now this should filter all those which includes timeslots of 6PM-7PM,9PM-10PM,11PM-12AM
or if the user selects
slots:[{6PM-7PM}]
We should still get the results that includes 6pm-7pm more or else don't matter.
First, I'd suggest using this for your slots representation for simplicity, but you can alter this approach depending on your actual code:
slots: ['6PM-7PM', '9PM-10PM', '11PM-12PM']
Then you can iterate through your data and use filter:
const querySlots = ['6PM-7PM', '9PM-10PM', '11PM-12PM'];
const matchedPersonsWithSlots = data.filter( (person) => {
let i = 0;
while ( i < person.extraDetails.slots.length ) {
if (querySlots.includes(person.extraDetails.slots[i]) return true;
i += 1;
}
return false;
});
matchedPersonsWithSlots will then have all the people that have a slot that matches one of the slots in your query, because if any of the query slots are in a person's list of slots, then it's included in the result set.
EDIT to include a different use case
If, however, every slot in the query array must be matched, then the filtering has to be done differently, but with even less code.
const matchedPersonsWithAllSlots = data.filter(person =>
querySlots.every((qSlot)=>person.extraDetails.slots.includes(qSlot)));
The above will go through each person in your data, and for each of them, determine whether the person has all of your query slots, and include them in the result list, only if this is true.
I want to make a list of checkboxes on a UI that user's can use to toggle and filter a set of data results. The checkboxes can be cumulative so I store them as a string array for now. My code looks something like this.
export interface IMyObjectFromAPI {
status: {
id: number,
description: string,
location: string,
name: string,
imageUrl: string
}
}
var filteredByTerms: string[] = [];
var resultsFromAPI: IMyObjectFromAPI [] = [];
var filteredDataResults: IMyObjectFromAPI[] = [];
I save the return results from the api call into the resultsFromAPI array.
On the UI, I have a group of checkboxes based on countries that is populated with a loop through a countries array. On select of a checkbox, I fire off the following code. Again, the goal here is to add multiple things to the array of terms to filter by (so I want to filter by location + name).
filterDataResults(term: string) {
var indexOfTerm = this.filteredByTerms.indexOf(term);
// if the term is not in an array of terms to filter by, add it
if (indexOfTerm === -1) {
this.filteredByTerms.push(term);
this.filteredDataResults = this.resultsFromAPI.filter(x => x.location ===
this.filteredByTerms.includes(term));
}
else {
this.filteredByTerms.splice(indexOfTerm, 1);
this.filteredDataResults = this.resultsFromAPI.filter(x => x.location ===
this.filteredByTerms.includes(term));
}
}
I don't know if I'm explaining this correctly but I've attached a picture to help. A series of checkboxes on the left, a data set on the right, and the checkboxes can be cumulative (so in the image example, if I select ITContractor and Clinical Psychology, the filter function would look for something in the results returned from the API which statifies both conditions.
It seems like some HOFs and map of filters might help you organize your user determined logic/filtering.
const filters = {
lastHourFilter: (result) => result.postedDate > Date.now() - ms('1 hour'),
last24HoursFilter: (result) => result.postedDate > Date.now() - ms('24 hours'),
...
itContractorFilter: generateSpecialismFilter('IT Contractor'),
clinicalPsychologyFilter: generateSpecialismFilter('Clinical Psychology'),
...
fullTimeFilter: generateJobTypeFilter('Full Time'),
temporaryFilter: generateJobTypeFilter('Temporary')
}
Then you inspect the check boxes and determine which filters you should apply to the results. Something like:
function applyFilters(results) {
Object.keys(filters).forEach((key) => {
if (checkboxes[key].checked) results =
results.filter(filters[key]);
});
return results;
}
Here checkboxes is a map of checkboxes in the DOM indexed by the same keys as your filters.
I built a custom component that filters an array of objects. The filter uses buttons, sets from active to non-active and allows more than one option on/off at the same time.
StackBlitz of my attempt - https://stackblitz.com/edit/timeline-angular-7-ut6fxu
In my demo you will see 3 buttons/options of north, south and east. By clicking on one you make it active and the result should include or exclude a matching "location" either north, south and east.
I have created my methods and structure to do the filtering, I'm struggling with the final piece of logic.
So far I have created a method to create an array of filtered locations depending on what the user clicks from the 3 buttons.
Next this passes to my "filter array" that gets the logic that should compare this filtered array against the original to bring back the array of results that are still remaining.
Its not quite working and not sure why - I originally got this piece of functionality working by using a pipe, but fore reasons do not want to go in that direction.
//the action
toggle(location) {
let indexLocation = this.filteredLocations.indexOf(location);
if (indexLocation >= 0) {
this.filteredLocations = this.filteredLocations.filter(
i => i !== location
);
} else {
this.filteredLocations.push({ location });
}
this.filterTimeLine();
}
// the filter
filterTimeLine() {
this.filteredTimeline = this.timeLine.filter(x =>
this.contactMethodFilter(x)
);
}
//the logic
private contactMethodFilter(entry) {
const myArrayFiltered = this.timeLine.filter(el => {
return this.filteredLocations.some(f => {
return f.location === el.location;
});
});
}
https://stackblitz.com/edit/timeline-angular-7-ut6fxu
Sorry for my expression but u have a disaster in your code. jajaja!. maybe u lost that what u need but the logic in your functions in so wrong. comparing string with objects. filter a array that filter the same array inside... soo u need make a few changes.
One:
this.filteredLocations.push({location});
Your are pushing object. u need push only the string.
this.filteredLocations.push(location);
Two:
filterTimeLine() {
this.filteredTimeline = this.timeLine.filter(x =>
this.contactMethodFilter(x)
);
}
in this function you filter the timeLine array. and inside of contactMethodFilter you call filter method to timeLine again....
See a functional solution:
https://stackblitz.com/edit/timeline-angular-7-rg7k3j
private contactMethodFilter(entry) {
const myArrayFiltered = this.timeLine.filter(el => {
return this.filteredLocations.some(f => {
return f.location === el.location;
});
});
}
This function is not returning any value and is passed to the .filter
Consider returning a boolean based on your logic. Currently the filter gets undefined(falsy) and everything would be filtered out