[рони]

dimas15,

const collator = new Intl.Collator(["ru", "en"], {
            numeric: true
        });
        let arr = obj.slice(0).sort((a, b) => {
                let numA = (/^\d+/).test(a.name),
                    numB = (/^\d+/).test(b.name);
                if (numA && !numB) return 1;
                if (!numA && numB) return -1;
                return collator.compare(
                    a.name,
                    b.name
                )
            }

        );
        const modmas = [];
        let temp = {};
        for (const el of arr) {
            const first = el.name[0].toUpperCase();
            if (temp.first != first) {
                temp = {
                    first,
                    data: []
                };
                modmas.push(temp)
            };
            temp.data.push(el)
        }
        console.log(modmas);
        const keys = modmas.map(({first}) => first);
        console.log(keys);