85 lines
2.6 KiB
TypeScript
85 lines
2.6 KiB
TypeScript
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/**
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* 随机工具函数库
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* 提供生成随机数、随机字符串、随机数组等功能。
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*/
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/**
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* 生成一个指定范围内的随机整数 (包含 min 和 max)
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* @param min 最小值 (包含)
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* @param max 最大值 (包含)
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*/
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export const getRandomInt = (min: number, max: number): number => {
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const minimum = Math.ceil(min);
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const maximum = Math.floor(max);
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return Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
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};
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/**
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* 生成一个指定长度的随机字符串
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* @param length 随机字符串的长度
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* @param chars 可选，使用的字符集，默认是字母 (大小写) 和数字
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*/
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export const getRandomString = (length: number, chars: string = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'): string => {
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let result = '';
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const charsLength = chars.length;
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for (let i = 0; i < length; i++) {
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result += chars.charAt(Math.floor(Math.random() * charsLength));
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}
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return result;
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};
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/**
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* 生成一个随机布尔值 (true 或 false)
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*/
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export const getRandomBoolean = (): boolean => {
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return Math.random() >= 0.5;
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};
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/**
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* 从数组中随机选取一个值
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* @param array 要随机提取的数组
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*/
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export const getRandomFromArray = <T>(array: T[]): T => {
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return array[Math.floor(Math.random() * array.length)];
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};
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/**
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* 打乱一个数组
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* @param array 要打乱的数组
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*/
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export const shuffleArray = <T>(array: T[]): T[] => {
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const shuffled = [...array]; // 创建一个副本以免修改原数组
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for (let i = shuffled.length - 1; i > 0; i--) {
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const j = Math.floor(Math.random() * (i + 1));
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[shuffled[i], shuffled[j]] = [shuffled[j], shuffled[i]];
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}
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return shuffled;
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};
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/**
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* 生成一个随机的十六进制颜色代码 (如 "#a1b2c3")
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*/
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export const getRandomHexColor = (): string => {
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return `#${Math.floor(Math.random() * 0xffffff).toString(16).padStart(6, '0')}`;
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};
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/**
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* 生成一个随机RGBA颜色
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* @param alpha 可选，透明度 (范围 0-1)
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*/
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export const getRandomRGBAColor = (alpha: number = 1): string => {
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const r = getRandomInt(0, 255);
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const g = getRandomInt(0, 255);
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const b = getRandomInt(0, 255);
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return `rgba(${r}, ${g}, ${b}, ${alpha})`;
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};
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/**
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* 随机延迟一段时间 (返回一个 Promise，在随机时间后 resolve)
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* @param min 最小延迟时间 (毫秒)
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* @param max 最大延迟时间 (毫秒)
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*/
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export const randomDelay = (min: number, max: number): Promise<void> => {
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const delay = getRandomInt(min, max);
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return new Promise(resolve => setTimeout(resolve, delay));
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};
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