Tags down


javascript: filter objects by multiple values with array using a functional approach

By : newcomer
Date : July 29 2020, 10:00 AM
help you fix your problem Creating an array of the key names is the right idea - check if .some of them, when that property is accessed on the object, are equal to the value:
code :
const filter_by_multiple_Columns = (carObject, value) => carObject.filter(
  car => list_of_keys.some(
    key => car[key] === value
const filterByColorsObject = list_of_objects => list_of_values.map(
  value => filter_by_multiple_Columns(list_of_objects, value)
{ make: 'mercedez',model: 'helicopter', colors: ['', '', 'orange'] }
{ make: 'mercedez',model: 'helicopter',colors: ['orange'] }
const filter_by_multiple_Columns = (carObject, Value) => carObject.filter(
  car => car.colors.includes(Value)

Share : facebook icon twitter icon

Functional approach to joining an Array of values with varying separator?

By : user70987
Date : March 29 2020, 07:55 AM
hope this fix your issue I'm looking for a functional way to perform this messy procedural logic: , If I understand correctly what you want, this should work:
code :
output = values.map do |v|
  ["/" + v.name.to_s, v.special? ? "/x" : ""]
output = "/" + values.flat_map do |v|
  [v.name.to_s, ("x" if v.special?)]
end.take(2*values.size - 1).join("/")
output = ([nil] + values).each_cons(2).map do |last_value, v|
  if last_value && last_value.special?
    "/x/" + v.name.to_s
    "/" + v.name.to_s

Filter with multiple predicates, elegant functional approach

By : Romainhm
Date : March 29 2020, 07:55 AM
I wish this helpful for you I think you're looking for the R.allPass function. You'd simply do
code :
var selectedPredicates = …;

How to filter an array of objects by the element inside an inner array - Functional Programming Javascript

By : You_Cef
Date : March 29 2020, 07:55 AM
seems to work fine You were almost there. With the check of the index with Array#indexOf, you could use it as return value.
code :
return bike.features.indexOf('carbon frame') + 1;
var bikes = [{ name: 'Cinelli Bolt', price: '2000', age: 1, singlespeed: 'yes', features: ['tubeless tires', 'disk brakes', 'carbon frame'] }, { name: 'Cinelli Mash', price: '1700', age: 3, singlespeed: 'yes', features: ['gatorskin tyres', 'sram drivetrain', 'steel frame'] }, { name: 'Specialized Langster', price: '1000', age: 1, singlespeed: 'no', features: ['two speed enclosed hub', 'bullbars', 'carbon frame'] }],
    justCarbonBikes = bikes.filter(function(bike) {
        return bike.features.indexOf('carbon frame') + 1;
    bikesWithoutCarbon = bikes.filter(function(bike) {
        return bike.features.indexOf('carbon frame') === -1;

.as-console-wrapper { max-height: 100% !important; top: 0; }
var bikes = [{ name: 'Cinelli Bolt', price: '2000', age: 1, singlespeed: 'yes', features: ['tubeless tires', 'disk brakes', 'carbon frame'] }, { name: 'Cinelli Mash', price: '1700', age: 3, singlespeed: 'yes', features: ['gatorskin tyres', 'sram drivetrain', 'steel frame'] }, { name: 'Specialized Langster', price: '1000', age: 1, singlespeed: 'no', features: ['two speed enclosed hub', 'bullbars', 'carbon frame'] }],
    justCarbonBikes = bikes.filter(b => b.features.includes('carbon frame')),
    bikesWithoutCarbon = bikes.filter(b => !b.features.includes('carbon frame'));

.as-console-wrapper { max-height: 100% !important; top: 0; }

Functional approach to transform an array of objects into a hierarchical structure with aggregates

By : Yusuke Ooi
Date : March 29 2020, 07:55 AM
like below fixes the issue It might not be what SO is for (as per comments above), but in case anyone needs to transform an array of flat objects into a hierarchical structure that you can simply specify the nesting order, number of levels, and field names, here is a recursive function to do so - https://github.com/lance-p/configurable-transform-flat-array-to-nested. Hope it might be of help to others.

Javascript: Filter an array of objects on multiple values

By : Mikkel Elmholdt
Date : March 29 2020, 07:55 AM
hope this fix your issue filterKeys (defined by Object.keys(filterList)) is an array of numeric keys (["0", "1", "2", "3"]) since filterList is an array whose keys are numeric indices.
I think you want filterKeys to be the keys of each object in the filterList array. This could be achieved most easily by making filterList a single object, with many keys, instead of an array of objects with one key each:
code :
const filterList = {
    'open': this.onlyOpen,
    'assmtComplete': this.onlyAssmtCompleted,
    'bureau': this.selectedBureau ? this.selectedBureau : '',
    'unit': this.selectedUnit ? this.selectedUnit : ''
Related Posts Related Posts :
  • is there something wrong with this JavaScript if statement?
  • Change color of leaflet map
  • Sum same property object by group
  • How to add a CSS to this JavaScript or HTML on click buttons?
  • changing background image of div using javascript
  • How to convert two arrays of strings to the array of objects like key and value with particular keys in javascript?
  • Passing res.send value from node.js backend to react.js
  • Dynamically generated href won't show properly
  • How to use data to set other data in Vue.js
  • Pass a PHP variable to a JS variable
  • Showing messages based on scroll position
  • Why hoisting works differently in variables compared to functions?
  • How to get enum name by value?
  • Javascript sort by object with an array with ES6 fails
  • Disable a JS function while another function is running
  • Execute commands for the google assistant - Node js
  • js - multiple if statements, if condition isnt met the following if statements are not checked
  • array.splice() deleting wrong element
  • How to detect when the div element width change (not window resize) in JS?
  • Why does the function call take place after the increment of variable x in this JavaScript code
  • How to resize of my output image after converting svg to image?
  • UseState shows previous value always
  • Looping though URLs with JSON
  • Vue two-way data binding issue
  • React/Redux foreach data
  • Why won't my javascript code work in a HTML file?
  • Loop input fields and hide using javascript
  • Convert buffer data to an image
  • How to: Onclick buttons and text area scripts
  • How do I use JavaScript to change an image in my <section> by the press of a button?
  • Error when using electron `app.getPath('home');`
  • Warning: Functions are not valid as a React child.This may happen if you return a Component instead of <Component /&g
  • React does not recognize the `tReady` prop
  • ReactJs mapStateToProps
  • I'm getting many errors like "Expected 'use strict' at column 4, not column 2." What does this mean?
  • Filter Multiple Values using ngx-filter-pipe
  • How do I remove duplicates from a list from input? (Javascript)
  • How to .map() meta tag in Next.js
  • Merging two JSON values as one to array
  • Constantly getting navigated to my html directory on clicking a button
  • axios.post gets denied but axios config gets accepted
  • Why does removeClass() not act on the inner element?
  • Uncaught Error: is not allowed to override this storefront. at webApplicationInjector.js:4
  • Is using document.getElementById in React an anti-pattern?
  • How to create string array from key/value in JS?
  • Destructuring assignment vs array.map
  • Is there a different method to setState with e.target.value in functional component react using hooks?
  • How to access state when component unmount with React Hooks?
  • How can I click on one element and listen for a change in another element's value?
  • Redux-Thunk : Actions must be plain objects
  • Merge two array of objects in Javascript
  • javascript is not working from asp.net to change simple label text
  • Load list objects in ajax response and create dynmic list divs with this data
  • Cloned my array, and yet the original array keeps getting modified. Why?
  • CSS: How to hide when fadeout completes?
  • How to I export the array in one file to import it into another file in react.js
  • Applying a Javascript function to multiple buttons?
  • Unable to assign data to specific index of array in javascript
  • Axios - [Unhandled promise rejection: Error: Request failed with status code 404]
  • Update object key using destructuring
  • shadow
    Privacy Policy - Terms - Contact Us © voile276.org