yuxuannnn_utils/lib/math/index.js

xs开发的前端工具包

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.findMinInArray = exports.findMaxInArray = exports.getRandomString = exports.getRandomNumber = exports.boundary = exports.boundaryMax = exports.boundaryMin = exports.sum = void 0;
/**
 * 加和
 */
function sum(...args) {
    return args.reduce((prev, cur) => prev + cur);
}
exports.sum = sum;
/** 限制最小值 */
const boundaryMin = (value, min) => {
    return value >= min ? value : min;
};
exports.boundaryMin = boundaryMin;
/** 限制最大值 */
const boundaryMax = (value, max) => {
    return value <= max ? value : max;
};
exports.boundaryMax = boundaryMax;
/**
 * 给定一个值和能取到的最大值以及最小值，返回边界内的数据，能取到边界值
 * @param value
 * @param min
 * @param max
 */
const boundary = (value, min, max) => {
    value = (0, exports.boundaryMin)(value, min);
    return (0, exports.boundaryMax)(value, max);
};
exports.boundary = boundary;
/**
 * 生成一个随机整数，包括min不包括max
 * @param min
 * @param max
 * @returns
 */
const getRandomNumber = (min, max) => {
    // Math.random() [0,1)
    return Math.floor(Math.random() * (max - min) + min);
};
exports.getRandomNumber = getRandomNumber;
/**
 * 生成一个随机的字符串
 * @param len
 * @returns
 */
const getRandomString = (len) => {
    return Math.random().toString(16).substring(2).substring(0, len);
};
exports.getRandomString = getRandomString;
const findMaxInArray = (array, compare) => {
    compare = compare || exports.findMaxInArray.compare;
    if (array.length === 0)
        return;
    let max = array[0];
    for (let i = 1; i < array.length; i++) {
        max = compare(max, array[i]);
    }
    return max;
};
exports.findMaxInArray = findMaxInArray;
exports.findMaxInArray.compare = function (a, b) {
    return Math.max(a, b);
};
const findMinInArray = (array, compare) => {
    compare = compare || exports.findMinInArray.compare;
    if (array.length === 0)
        return;
    let min = array[0];
    for (let i = 1; i < array.length; i++) {
        min = compare(min, array[i]);
    }
    return min;
};
exports.findMinInArray = findMinInArray;
exports.findMinInArray.compare = function (a, b) {
    return Math.min(a, b);
};