• Nov 19, 2022 •CodeCatch
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const countSubstrings = (str, searchValue) => { let count = 0, i = 0; while (true) { const r = str.indexOf(searchValue, i); if (r !== -1) [count, i] = [count + 1, r + 1]; else return count; } }; countSubstrings('tiktok tok tok tik tok tik', 'tik'); // 3 countSubstrings('tutut tut tut', 'tut'); // 4
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function formatDate(date) { return date.toLocaleDateString(); } function Comment(props) { return ( <div className="Comment"> <div className="UserInfo"> <img className="Avatar" src={props.author.avatarUrl} alt={props.author.name} /> <div className="UserInfo-name"> {props.author.name} </div> </div> <div className="Comment-text">{props.text}</div> <div className="Comment-date"> {formatDate(props.date)} </div> </div> ); } const comment = { date: new Date(), text: 'I hope you enjoy learning React!', author: { name: 'Hello Kitty', avatarUrl: 'https://placekitten.com/g/64/64', }, }; ReactDOM.render( <Comment date={comment.date} text={comment.text} author={comment.author} />, document.getElementById('root') );
• Jan 17, 2021 •C S
const getSearchTerm = delimiter => { let searchTerm = ""; for (let i = 1; i < commands.length - 1; i++) searchTerm = searchTerm + commands[i] + delimiter; searchTerm += commands[commands.length - 1]; return searchTerm; };
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//JavaScript program to swap two variables //take input from the users let a = prompt('Enter the first variable: '); let b = prompt('Enter the second variable: '); // XOR operator a = a ^ b b = a ^ b a = a ^ b console.log(`The value of a after swapping: ${a}`); console.log(`The value of b after swapping: ${b}`);
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const linearSearch = (arr, item) => { for (const i in arr) { if (arr[i] === item) return +i; } return -1; }; linearSearch([2, 9, 9], 9); // 1 linearSearch([2, 9, 9], 7); // -1
const bucketSort = (arr, size = 5) => { const min = Math.min(...arr); const max = Math.max(...arr); const buckets = Array.from( { length: Math.floor((max - min) / size) + 1 }, () => [] ); arr.forEach(val => { buckets[Math.floor((val - min) / size)].push(val); }); return buckets.reduce((acc, b) => [...acc, ...b.sort((a, b) => a - b)], []); }; bucketSort([6, 3, 4, 1]); // [1, 3, 4, 6]