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/**
 * 判断设备是否为 Android，包含**桌面模式**
 * 
 * @see https://useragentstring.com/ ua 检测
 * 
 * @returns 
 */
function isAndroid() {

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function throttle(func, threshold) {
    let start = Date.now(), timer;

    return function (...args) {
        const ctx = this, curr = Date.now();

        clearTimeout(timer);
        if (curr - start >= threshold) {
            func.apply(ctx, args);
            start = curr;

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public class PrimeNumber {
	/**
	 * 判断是否为素数
	 *
	 * 只能被1和本身整除的数字为素数
	 *
	 * @param n
	 * @return
	 */
	public static boolean isPrime(int n) {

tianyk

```
1. T extends (...args: any) => any 为约束条件，约束 T 的类型为 `(...args: any) => any`
2. T extends (...args: any) => infer R ? R : any 取值，如果 `T extends (...args: any) => R` 那么返回值为 `R` 否则为 `any` 
```
type ReturnType<T extends (...args: any) => any> = T extends (...args: any) => infer R ? R : any;

```
如果 T 是Promise 返回值为 `U` 否则 为 `never`
```
type PromiseType<T> = T extends Promise<infer U> ? U : never;

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function encode(id) {
  return ('' + parseInt(id) * 71)
    .split('')
    .map(v => parseInt(v) + 65)
    .map(code => String.fromCharCode(code))
    .join('');
}

function decode(code) {
    return parseInt(code.split('').map(char => char.charCodeAt(0) - 65).join('')) / 71;

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function escape(col) {
    return '"' + col.replace(/"/g, '""') + '"';
}

const utf8BOM = '\ufeff';

const csvData = `姓名,年龄
小 明,10
小红, 10
小李 ,8

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var importScript = (function (oBody) {
	return function (sSrc, fOnload) {
		var oScript = document.createElement('script');
		oScript.type = 'text\/javascript';

		if (typeof fOnload === 'function') {
			oScript.onerror = function (evt) {
				fOnload(new URIError('The script ' + evt.target.src + ' is not accessible.'));
			};
			oScript.onload = function () {

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function promisify(fn) {
	return (...args) => {
		return new Promise((resolve, reject) => {
			fn(...args, (err, ...vals) => {
				if (err) return reject(err);
				resolve(...vals);
			});
		});
	}
}

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{"lastUpload":"2021-07-21T07:48:58.873Z","extensionVersion":"v3.4.3"}

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function get(obj, fields) {
	if (!obj) return;

	return fields.split('.')
		.reduce((obj, key) => obj[key], obj);
}

function set(obj, fields, val) {
	if (!obj) return;