lets say i have the following array, how can i achieve the last given example in my this question by modifing the given reduce function?
i have tried to assign [cur] to a plans key but it only puts the first element out.
i have the feeling it have something to do with the way i concat the objects but i cant figure it out on my own.
{
employee: 'employee_1',
customer: {
name: 'customer_1',
},
startdate: '2020-03-01T23:00:00.000Z'
}, {
employee: 'employee_2',
customer: {
name: 'customer_1',
},
startdate: '2020-03-01T23:00:00.000Z'
}, {
employee: 'employee_3',
customer: {
name: 'customer_1',
},
startdate: '2020-03-01T23:00:00.000Z'
}
plans.reduce(function(o, cur) {
// Get the index of the key-value pair.
var occurs = o.reduce(function(n, item, i) {
return (item.customer.toString() === cur.customer.toString()) ? i : n;
}, -1);
// If the name is found,
if (occurs >= 0) {
// append the current value to its list of values.
o[occurs].employee = o[occurs].employee.concat(cur.employee)
o[occurs].startdate = o[occurs].startdate.concat(cur.startdate)
// Otherwise
} else {
// add the current item to o (but make sure the value is an array).
var obj = {
customer: cur.customer,
employee: [cur.employee],
startdate: [cur.startdate]
};
o = o.concat([obj]);
}
return o;
}, [])
this reduces the given array to something like this:
{
customer: {
name: 'customer_1'
},
employee: [{
employee: 'employee_1'
}, {
employee: 'employee_2'
}, {
employee: 'employee_3'
}],
startdate: [{
startdate: '2020-03-01T23:00:00.000Z'
}, {
startdate: '2020-03-01T23:00:00.000Z'
}, {
startdate: '2020-03-01T23:00:00.000Z'
}]
}
But what i need is something like this:
{
customer: {customer_data},
plans: [{
employee: 'employee_1',
startdate: '2020-03-01T23:00:00.000Z'
}, {
employee: 'employee_2',
startdate: '2020-03-01T23:00:00.000Z'
}, {
employee: 'employee_3',
startdate: '2020-03-01T23:00:00.000Z'
}]
}
I modified your solution so as to get the desired output .
Instead of using reduce , you should use find method to check if customer already exists in the array . Also you were not taking into consideration the plans array , I have added that.
var plans = [
{
employee: 'employee_1',
customer: {
name: 'customer_1',
},
startdate: '2020-03-01T23:00:00.000Z'
}, {
employee: 'employee_2',
customer: {
name: 'customer_1',
},
startdate: '2020-03-01T23:00:00.000Z'
}, {
employee: 'employee_3',
customer: {
name: 'customer_1',
},
startdate: '2020-03-01T23:00:00.000Z'
}
];
var result = plans.reduce(function(o, cur) {
// Get the index of the key-value pair.
var occurs = o.find(ob=> ob.customer.name === cur.customer.name);
// If the name is found,
if (occurs) {
// append the current value to its list of values.
occurs.plans.push( {employee: cur.employee,
startdate: cur.startdate} )
// Otherwise
} else {
// add the current item to o (but make sure the value is an array).
var obj = {
customer: cur.customer,
plans:[
{employee: cur.employee,
startdate: cur.startdate}
]
};
o = o.concat(obj);
}
return o;
}, [])
console.log(result)