@techmely/utils/array.js

Collection of helpful JavaScript / TypeScript utils

/*!
 * @techmely/utils
 * Copyright(c) 2021-2024 Techmely <techmely.creation@gmail.com>
 * MIT Licensed
 */

"use strict";
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);

// src/array.ts
var array_exports = {};
__export(array_exports, {
  chunk: () => chunk,
  findLastIndex: () => findLastIndex,
  groupBy: () => groupBy,
  normalize: () => normalize,
  remove: () => remove,
  sample: () => sample,
  shuffle: () => shuffle,
  take: () => take,
  unique: () => unique,
  uniqueObj: () => uniqueObj
});
module.exports = __toCommonJS(array_exports);
function unique(array) {
  return [...new Set(array)];
}
function uniqueObj(items, uniqueKey) {
  const map = /* @__PURE__ */ new Map();
  for (const item of items) {
    const key = item[uniqueKey];
    if (!map.has(key)) {
      map.set(key, item);
    }
  }
  return [...map.values()];
}
function take(array, limit) {
  return array.slice(0, limit);
}
function findLastIndex(array, predicate) {
  let l = array.length;
  while (l--) {
    if (predicate(array[l], l, array)) {
      return l;
    }
  }
  return -1;
}
function groupBy(list, keyGetter) {
  const map = /* @__PURE__ */ new Map();
  for (const item of list) {
    const key = keyGetter(item);
    const collection = map.get(key);
    if (collection) {
      collection.push(item);
    } else {
      map.set(key, [item]);
    }
  }
  return map;
}
function remove(arr, el) {
  const i = arr.indexOf(el);
  if (i > -1) {
    arr.splice(i, 1);
  }
}
function sample(arr, count) {
  return Array.from({ length: count }, (_) => arr[Math.round(Math.random() * (arr.length - 1))]);
}
function shuffle(array) {
  for (let i = array.length - 1; i > 0; i--) {
    const factor = Math.floor(Math.random() * (i + 1));
    [array[i], array[factor]] = [array[factor], array[i]];
  }
  return array;
}
function chunk(array, size = 1) {
  if (!array || array.length === 0) {
    return [];
  }
  const chunkLength = Math.ceil(array.length / size);
  return Array.from({ length: chunkLength }, (_v, i) => {
    const start = i * size;
    return array.slice(start, start + size);
  });
}
function normalize(array, key) {
  if (!array || array.length === 0)
    return {};
  return array.reduce((acc, cur) => {
    const keyValue = cur[key];
    if (keyValue) {
      return Object.assign(acc, { [keyValue]: cur });
    }
    return acc;
  }, {});
}
// Annotate the CommonJS export names for ESM import in node:
0 && (module.exports = {
  chunk,
  findLastIndex,
  groupBy,
  normalize,
  remove,
  sample,
  shuffle,
  take,
  unique,
  uniqueObj
});