Having some trouble using 2 arrays to form a new array of subarrays depending on whether the phones match up with the sims. I want to organise:
let phones = ["phone1", "phone2", "phone3"]
let sims = [ 'phone1sim1', 'phone1sim2', 'phone2sim1', 'phone2sim2', 'phone1sim3', 'phone3sim1' ]
into an array of subarrays like so:
let orgPhones = [
["phone1", ["phone1sim1", "phone1sim2"]],
["phone2", ["phone2sim1", "phone2sim2"]],
["phone3", ["phone3sim1"]]
]
any suggestions appreciated!!
To return exactly what you require, you can utilise the Array.protoype methods; map and filter like so:
const organised = phones.map((phone)=> [phone, sims.filter(sim => sim.indexOf(phone)!== -1)]);
However, I would strongly encourage you to utilise a JavaScript object instead of an array, like so:
{
phone1: ['phone1sim1', 'phone1sim2', 'phone1sim3']
phone2: ['phone2sim1', 'phone2sim2']
// etc...
}
Based on the anticipated result outlined above, I would use something along the lines of the following:
const phones = ['phone1', 'phone2', 'phone3'];
const sims = ['phone1sim1', 'phone1sim2', 'phone2sim1', 'phone2sim2', 'phone1sim3', 'phone3sim1'];
const organised = {};
phones.map((phone)=> organised[phone] = sims.filter(sim => sim.indexOf(phone)!== -1));
You can use Map like this:
let phones = ["phone1", "phone2", "phone3"]
let sims = [ 'phone1sim1', 'phone1sim2', 'phone2sim1', 'phone2sim2', 'phone1sim3', 'phone3sim1' ]
let map = phones.reduce((map,phone)=>{
return map.set(phone,sims.filter(sim=>sim.startsWith(phone)))
},new Map())
console.log(...map)
object instead of an array. +1
Map that's more or less similar to object. We can use Map.get(key) to retrieve value array. 2D arrays can easily be converted to maps of keys/values and vice versa.reduce and startsWith bits. This is a great answer!you can iterate over phones array, and search for the related sim in sims array
let phones = ["phone1", "phone2", "phone3"]
let sims = ['phone1sim1', 'phone1sim2', 'phone2sim1', 'phone2sim2', 'phone1sim3', 'phone3sim1']
const res = phones.map((phone) => [phone, sims.filter(sim => sim.indexOf(phone) !== -1)])
console.log(res);
Having some trouble usingplease post the code also, in which you're having trouble{"phone1": ["phone1sim1", "phone1sim2"],"phone2": ["phone2sim1", "phone2sim2"], "phone3": ["phone3sim1"]}