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// 判断arr是否为一个数组,返回一个bool值
function isArray(arr) { return Object.prototype.toString.call(arr) === '[object Array]';}// 深度克隆
function deepClone(obj) { // 对常见的“非”值,直接返回原来值
if ([null, undefined, NaN, false].includes(obj)) return obj; if (typeof obj !== "object" && typeof obj !== 'function') { //原始类型直接返回
return obj; } var o = isArray(obj) ? [] : {}; for (let i in obj) { if (obj.hasOwnProperty(i)) { o[i] = typeof obj[i] === "object" ? deepClone(obj[i]) : obj[i]; } } return o;}
function getUUid(len = 32, firstU = true, radix = null) { let chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split(''); let uuid = []; radix = radix || chars.length;
if (len) { // 如果指定uuid长度,只是取随机的字符,0|x为位运算,能去掉x的小数位,返回整数位
for (let i = 0; i < len; i++) uuid[i] = chars[0 | Math.random() * radix]; } else { let r; // rfc4122标准要求返回的uuid中,某些位为固定的字符
uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-'; uuid[14] = '4';
for (let i = 0; i < 36; i++) { if (!uuid[i]) { r = 0 | Math.random() * 16; uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r]; } } } // 移除第一个字符,并用u替代,因为第一个字符为数值时,该guuid不能用作id或者class
if (firstU) { uuid.shift(); return 'u' + uuid.join(''); } else { return uuid.join(''); }}export { deepClone, getUUid};
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