javascript Compare two arrays regardless of order
const isEqual = (a, b) => JSON.stringify(a) === JSON.stringify(b);
// Examples
isEqual([1, 2, 3], [1, 2, 3]); // true
isEqual([1, 2, 3], [1, '2', 3]); // falsejavascript Compare two arrays regardless of order
const isEqual = (a, b) => JSON.stringify(a) === JSON.stringify(b);
// Examples
isEqual([1, 2, 3], [1, 2, 3]); // true
isEqual([1, 2, 3], [1, '2', 3]); // falsecomparing array of objects in javascript
// IN THIS EXAMPLE WE HAVE GROUP INSERTS - DATA TO BE ADDED TO DB
// TO INSERT INTO DB EACH GROUP NAME MUST BE THE MATCHING ID
// CONATCT NAME MUST ALSO BE MATCHING ID
// THE CODE BELOW SHOWS HOW TO TRAVERSE THROGUH TWO ARRAYS AND COMPARE / ADD VALES
const groupInserts = [ { groups: [ 'Chess', 'Science', 'German' ], name: 'Ian Smith' },
{ groups: [ 'Swimming' ], name: 'Jenny Smith' },
{ groups: [ 'Tennis' ], name: 'Susan Jones' },
{ groups: [ 'Coding', 'Science' ], name: 'Judy Davis' } ]
const nameAndIdsFromDB = [ { name: 'Parent_1', id: 1 },
{ name: 'Parent_2', id: 2 },
{ name: 'Ian Smith', id: 99 },
{ name: 'Jenny Smith', id: 100 },
{ name: 'Susan Jones', id: 101 },
{ name: 'Judy Davis', id: 102 } ]
const groupnameAndIdsFromDB = [ { name: 'Debugging', id: 1 },
{ name: 'React', id: 2 },
{ name: 'New record with no people', id: 3 },
{ name: 'New record with people', id: 4 },
{ name: 'Chess', id: 12 },
{ name: 'Science', id: 13 },
{ name: 'German', id: 14 },
{ name: 'Swimming', id: 15 },
{ name: 'Tennis', id: 16 },
{ name: 'Coding', id: 17 } ]
let groupNamesWithIds = [];
groupInserts.forEach(data => {
if (data.groups) {
data.groups.map(e => {
let obj = {};
obj.group = e;
obj.name = data.name
groupNamesWithIds.push(obj);
})
}
})
let addedMessageGroupIds = [];
groupNamesWithIds.forEach(data => {
groupnameAndIdsFromDB.map(e => {
if (e.name === data.group) {
addedMessageGroupIds.push({group: data.group, name: data.name, messages_individual_groups_id: e.id})
}
})
})
let addedContactIds = [];
addedMessageGroupIds.forEach(data => {
nameAndIdsFromDB.map(e => {
if (e.name === data.name) {
addedContactIds.push({messages_individual_groups_id: data.messages_individual_groups_id, contact_id: e.id, created_at: Date.now()})
}
})
})Copyright © 2021 Codeinu
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