flash-section-list/lib/commonjs/utils.js

SectionList base on FlashList

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.omit = exports.lcm = exports.findFirstProp = exports.binarySearchClosestIndex = void 0;
const omit = (obj, props, mutable = false) => {
  if (obj === null || typeof obj !== 'object') {
    return obj;
  }
  const copy = mutable ? obj : {
    ...obj
  };
  for (let i = 0; i < props.length; i++) {
    const prop = props[i];
    if (prop) {
      delete copy[prop];
    }
  }
  return copy;
};
exports.omit = omit;
const _gcd = (a, b) => {
  while (b !== 0) {
    let temp = b;
    b = a % b;
    a = temp;
  }
  return a;
};
const _lcm = (a, b) => {
  return a * b / _gcd(a, b);
};
const lcm = numbers => {
  return numbers.reduce((acc, cur) => _lcm(acc, cur), 1);
};
exports.lcm = lcm;
const findFirstProp = (obj, props) => {
  if (!obj || typeof obj !== 'object') return;
  for (let i = 0; i < props.length; i++) {
    const prop = props[i];
    const value = obj[prop];
    if (value !== undefined) return value;
  }
};
exports.findFirstProp = findFirstProp;
const binarySearchClosestIndex = (arr, value) => {
  if (!arr?.length) return -1;
  let low = 0;
  let high = arr.length - 1;
  while (low <= high) {
    const mid = Math.floor((low + high) / 2);
    const midValue = arr[mid];
    if (midValue === value) {
      return mid;
    }
    if (low === mid || high === mid) {
      // return low or high
      if (arr[high] <= value) {
        return high;
      }
      return low;
    }

    // left
    if (midValue > value) {
      high = mid;
    }
    // right
    else if (midValue < value) {
      low = mid;
    }
  }
  return -1;
};
exports.binarySearchClosestIndex = binarySearchClosestIndex;
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