@aegenet/belt-array-duplicates/dist/index.mjs

Strip duplicates from array / get duplicates of an array.

function u(n, s = {}) {
  if (n != null && n.length) {
    const t = n.slice(0);
    if (s.compare && !s.sorted)
      throw new Error("Invalid usage: compare function is only available with sorted array.");
    if (s.sorted) {
      let i = s.compare;
      if (!i) {
        const e = typeof t[0] == "number" ? [] : Object.keys(t[0]);
        e.length === 0 ? i = (l, r) => l == r : i = (l, r) => {
          let c = !0;
          for (let f = 0; f < e.length; f++) {
            const o = e[f];
            if ((l ? JSON.stringify(l[o]) : null) !== (r ? JSON.stringify(r[o]) : null)) {
              c = !1;
              break;
            }
          }
          return c;
        };
      }
      for (let e = t.length - 1; e > 0; e--)
        i(t[e], t[e - 1]) && t.splice(e, 1);
      return t;
    } else
      return t.filter((i, e) => t.indexOf(i) === e);
  } else
    return [];
}
function a(n) {
  const s = [];
  if (n) {
    const t = {};
    for (let i = 0; i < n.length; i++) {
      const e = n[i];
      e in t ? t[e]++ : t[e] = 0, t[e] === 1 && s.push(e);
    }
  }
  return s;
}
export {
  a as getDuplicates,
  u as stripDuplicates
};
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