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Tolerim
24 days ago

Is it necessary to conduct an array filtering operation based on checkbox value in React Native?

To solve the issue of removing unchecked values from the checkedValues array and updating the setNewArray, I have implemented a logic where if a user unchecks a checkbox, the corresponding value is removed from the checkedValues array using the filter() method. Here's the modified code: ```jsx import React, {useState, useEffect} from 'react'; import { View, Text, Image, StyleSheet, TextInput, TouchableOpacity, TouchableWithoutFeedback, } from 'react-native'; import {Search} from 'react-native-feather'; import SearchItem from './src/Screens/SearchItem'; import {getHeight, getWidth} from './src/Components/CommonFunctions'; import CheckBox from '@react-native-community/checkbox'; import Modal from 'react-native-modal'; import { widthPercentageToDP as wp, heightPercentageToDP as hp, } from 'react-native-responsive-screen'; var checkedValues: any = []; const FullfillmentScreen = ({route}) => { const {data} = route.params; const [currentDate, setCurrentDate] = useState(''); useEffect(() => { var date = new Date().getDate(); var month = new Date().getMonth() + 1; var year = new Date().getFullYear(); var hour = new Date().getHours(); var min = new Date().getMinutes(); setCurrentDate(date + ' ' + month + ' ' + year + ', ' + hour + ':' + min); }, []); const array: any = [...]; const [search, setSearch] = useState(''); const [apply, setApply] = useState(false); const [modalVisibile, setModalVisibile] = useState(false); const [new_Array, setNewArray] = useState([]); const [isChecked, setIsChecked] = useState({ created: false, processing: false, picked: false, packed: false, completed: false, cancelled: false, }); const options = [ 'Created', 'processing', 'Picked', 'Packed', 'Completed', 'Cancelled', ]; const filtered = (type: any) => { if (isChecked[type.toLowerCase()]) { checkedValues.push(type); } else { checkedValues = checkedValues.filter((item: any) => item !== type); } setNewArray( array.filter((item: any) => { return checkedValues.includes(item.state); }), ); }; return ( {data} Fulfillments setModalVisibile(true)} style={styles.filterView}> setSearch(query)} /> setModalVisibile(false)}>
Answers(2)
avatar
Vogi
22 days ago
Verified Answer
You can use the filter() method to remove unchecked values from the checkedValues array and update the setNewArray. Here's how you can modify your code: 
const filtered = (type: any) => {
  if (isChecked[type.toLowerCase()]) {
    checkedValues.push(type);
  } else {
    checkedValues = checkedValues.filter((item: any) => item !== type);
  }
  setNewArray(
    array.filter((item: any) => {
      return checkedValues.includes(item.state);
    }),
  );
};
In this code, if a user unchecks a checkbox, the corresponding value is removed from the checkedValues array using the filter() method. Then, the setNewArray() function is called with an updated array value that filters out unchecked values from the original array. I hope this helps! Let me know if you have any other questions.

Sources

Checkbox List in React JS with Example – Contact MentorHandling Multiple Checkboxes in React | CodeX - MediumRemoving the value from array after unchecking the checkbox in LWCHow to delete an element from array in react? - Stack OverflowAdding checked checkboxes to an array and removing the unchecked ones ...Need to filter the array based on checkbox value in React Native?
avatar
Tolerim
24 days ago
To remove the unchecked value from the checkedValues array and update the setNewArray state, you can modify the filtered function as follows: 
const filtered = (type: any) => {
  if (isChecked[type.toLowerCase()]) {
    checkedValues.push(type);
  } else {
    checkedValues = checkedValues.filter((item: any) => item !== type);
  }

  console.log("Checked Values Array====>", checkedValues);

  setNewArray(
    array.filter((item: any) => {
      return checkedValues.includes(item.state);
    })
  );
};
In this modified function, we first check if the checkbox is checked or unchecked. If it is checked, we add the type value to the checkedValues array, and if it is unchecked, we remove the type value from the checkedValues array using the filter() method. After updating the checkedValues array, we use the setNewArray() function to update the state value of new_Array based on the filtered values of array. We filter the array by checking if the state property of each item in the array is included in the checkedValues array using the includes() method.
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