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Commit 07daf5f

Browse files
feat: add problems
1 parent b2019bd commit 07daf5f

8 files changed

+109
-0
lines changed

‎BFE.dev/10. first bad version.js

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/**
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* @param {Function} func
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* @param {number} wait
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*/
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function throttle(func, wait) {
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let waiting;
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let params;
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function callback() {
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if (params) {
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func(...params);
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params = null;
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}
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}
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return function (...args) {
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params = args;
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if (!waiting) {
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callback();
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}
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waiting = setTimeout(() => {
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waiting = null;
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callback();
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}, wait);
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};
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}

‎BFE.dev/5. implement throttle() with leading & trailing option.js

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/**
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* @param {Function} func
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* @param {number} wait
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*/
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function debounce(func, wait) {
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let timer;
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return function (...args) {
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clearTimeout(timer);
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timer = setTimeout(() => {
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func(...args);
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timer = null;
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}, wait);
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};
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}
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/**
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* @param {Function} func
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* @param {number} wait
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* @param {boolean} option.leading
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* @param {boolean} option.trailing
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*/
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function debounce(func, wait, option = { leading: false, trailing: true }) {
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let timer;
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let lastArgs;
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return function betterFunction(...args) {
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lastArgs = args;
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clearTimeout(timer);
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if (option.leading && !timer && lastArgs) {
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func(...lastArgs);
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lastArgs = null;
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}
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timer = setTimeout(() => {
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if (option.trailing && lastArgs) {
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func(...lastArgs);
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}
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timer = null;
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}, wait);
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};
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}
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/**
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* @param {any[]} arr
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*/
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function shuffle(arr) {
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for (let i = 0; i < arr.length; i++) {
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const j = i + Math.floor(Math.random() * (arr.length - i));
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[arr[i], arr[j]] = [arr[j], arr[i]];
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}
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}

‎BFE.dev/9. decode message.js

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/**
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* @param {string[][]} message
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* @return {string}
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*/
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function decode(message) {
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let ans = "";
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let i = 0;
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let j = 0;
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let direction = 1;
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while (j < message.length && i < message[0].length) {
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ans += message[j][i];
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i++;
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if (j === 0) {
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direction = 1;
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}
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if (j + 1 === message.length) {
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direction = -1;
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}
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j += direction;
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}
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return ans;
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}
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/**
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* @param {string[]} emails
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* @return {number}
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*/
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var numUniqueEmails = function (emails) {
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const uniqueEmails = {};
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emails.forEach(email => {
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const [username, domainName] = email.split("@");
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uniqueEmails[`${username.split("+")[0].replaceAll(".", "")}@${domainName}`] = 1;
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});
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return Object.keys(uniqueEmails).length;
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};

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