Good afternoon. I'm new and just learning. Please help me to solve the problem with array merging. i hav 2 arrays
let arr1 = [['boss',, 'boss I.V.', '5552654','card 100'],
['ard',, 'ard J.B.', '3722654','card 520'],
['Jon',, 'Jon sviss', '394554','card 22120'],
['Elty B',, 'Elty Bitry B.', '12265664', 'card 9990'],
['Elty B.I',, 'Elty Bitry I.','3322654', 'card 002200']];
let arr2 = [['boss', 3000, 'comm1'],
['Elty B', 8000.500, 'comm2']];
//--------------------------------------------
//I need to get:
let arrR = [[1,'boss I.V.', '5552654', 'card 100', 3000, 'comm1'],
[2,'Elty Bitry B.', '12265664', 'card 9990', 8000.500, 'comm2']];
//--------------------------------------------
// i made it a loop 'for':
arr1 = arr1.filter( (item) => arr2.find((el) => el[0] === item[0])).sort();
for (var i = 0; i<arr1.length; i++) {
arr1[i].push(arr2[i][1],arr2[i][2]);
arr1[i].splice(0,1);
arr1[i][0] = i+1;
}
return arr1;
//--------------------------------------------
//it is not right (((
how to do it correctly by finding by value: " if (arr1[i][0] === arr2[k][0]) " and don't use a loop?
you have to add commas in your arr1 statement and add the bracket at the end of the arr2 statement and remove the sort() function.
const arrR = arr2.map((e, i) => {
const m = arr1.find(item => item[0] === e[0]);
return [i + 1, ...m.splice(2), ...e.splice(1)];
});
Since the resulting array has the same number of entries as arr2 I am calling map on arr2.