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54 lines
1.5 KiB
54 lines
1.5 KiB
// 判断arr是否为一个数组，返回一个bool值
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function isArray(arr) {
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return Object.prototype.toString.call(arr) === '[object Array]';
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}
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// 深度克隆
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function deepClone(obj) {
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// 对常见的“非”值，直接返回原来值
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if ([null, undefined, NaN, false].includes(obj)) return obj;
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if (typeof obj !== "object" && typeof obj !== 'function') {
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//原始类型直接返回
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return obj;
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}
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var o = isArray(obj) ? [] : {};
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for (let i in obj) {
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if (obj.hasOwnProperty(i)) {
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o[i] = typeof obj[i] === "object" ? deepClone(obj[i]) : obj[i];
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}
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}
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return o;
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}
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function getUUid(len = 32, firstU = true, radix = null) {
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let chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('');
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let uuid = [];
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radix = radix || chars.length;
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if (len) {
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// 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
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for (let i = 0; i < len; i++) uuid[i] = chars[0 | Math.random() * radix];
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} else {
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let r;
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// rfc4122标准要求返回的uuid中,某些位为固定的字符
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uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-';
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uuid[14] = '4';
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for (let i = 0; i < 36; i++) {
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if (!uuid[i]) {
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r = 0 | Math.random() * 16;
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uuid[i] = chars[(i == 19) ? (r & 0x3) | 0x8 : r];
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}
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}
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}
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// 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
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if (firstU) {
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uuid.shift();
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return 'u' + uuid.join('');
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} else {
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return uuid.join('');
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}
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}
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export {
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deepClone,
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getUUid
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};
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