functiongetTime(today){constampm=today.getHours()>12 ?'pm' :'am';consthours=today.getHours()%12 ?today.getHours()%12 :12;constminutes=today.getMinutes()<10 ?`0${today.getMinutes()}` :today.getMinutes();constseconds=today.getSeconds()<10 ?`0${today.getSeconds()}` :today.getSeconds();return`${hours}${ampm} :${minutes} :${seconds}`;}functiongetDay(today){return['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday',][today.getDay()];}constd=newDate();console.log(`Today is${getDay(d)}`);console.log(`Current time is${getTime(d)}`);

functiongetDate(date,format,separator){constdata={yyyy:today.getFullYear(),mm:today.getMonth()<10 ?`0${today.getMonth()}` :today.getMonth(),dd:today.getDate()<10 ?`0${today.getDate()}` :today.getDate(),};returnformat.split(separator).map((char)=>data[char]).join(separator);}consttoday=newDate();console.log(getDate(today,'mm-dd-yyyy','-'));console.log(getDate(today,'mm/dd/yyyy','/'));console.log(getDate(today,'dd-mm-yyyy','-'));console.log(getDate(today,'dd/mm/yyyy','/'));

functionareaOfTriangle(a,b,c){consts=(a+b+c)/2;returnMath.sqrt(s*(s-a)*(s-b)*(s-c));}console.log(areaOfTriangle(5,6,7));

functiondaysUntilChristmas(){consttoday=newDate();constdifference=newDate(today.getFullYear(),11,25)-newDate();constoneDayInNilliseconds=1000*3600*24;returnMath.ceil(difference/oneDayInNilliseconds);}console.log(daysUntilChristmas());

functiongetExtension(filename){returnfilename.substring(filename.lastIndexOf('.')+1);}console.log(getExtension('hello-world.txt'));console.log(getExtension('awesome.component.ts'));console.log(getExtension('readme.md'));console.log(getExtension('user.jsx'));

functionmatches(source,target){returnObject.keys(source).every((key)=>target.hasOwnProperty(key)&&target[key]===source[key]);}constcar={color:'red',type:'suv',};p1={name:'john doe',  car,};p2={name:'john doe',  car,};console.log(matches(p1,p2));// trueconsole.log(matches(p1,{color:'red',type:'suv'}));// falseconsole.log(matches(p1,{name:'john doe', car}));// trueconsole.log(matches(p1,{name:'jane doe', car}));// false

functionarrayToCSV(collection){constheaders={};constrows=collection.map((row)=>`${Object.keys(row).map((key)=>{headers[key]=key;returnrow[key];}).join(',')}`).join('\n');return`${Object.keys(headers).join(',')}\n${rows}`;}console.log(arrayToCSV([{name:'India',city:'Pune',continent:'Asia'},{name:'Kenya',city:'Mombasa',continent:'Africa'},{name:'Canada',city:'Waterloo',continent:'North America',captial:'Ottawa',},{name:'France',city:'Paris',continent:'Europe'},]));

functionnumberToArray(num){if(typeofnum==='number'){return`${num}`.split('').map((n)=>parseInt(n));}else{returnNaN;}}console.log(numberToArray(1234));// [1, 2, 3, 4]console.log(numberToArray('dsc'));// NaN

functionucfirst(str){return`${str.charAt(0).toUpperCase()}${str.substring(1)}`;}console.log(ucfirst('javascript'));

functionis_array(param){returnObject.getPrototypeOf(param)===Array.prototype;}console.log(is_array([1,2,3,4]));// trueconsole.log(is_array('abcd'));// false

// using spread operatorfunctioncloneArr(arr){return[...arr];}console.log([1,2,3,4,5]);// using for slicefunctioncloneArr(arr){returnarr.slice();}console.log([1,2,3,4,5]);// using JSON objectfunctioncloneArr(arr){returnJSON.parse(JSON.stringify(arr));}console.log([1,2,3,4,5]);// using Array.fromfunctioncloneArr(arr){returnArray.from(arr);}console.log([1,2,3,4,5]);

functionreverse(str){returnstr.split('').reverse().join('');}// Test the functionconstinput="Hello, World!";constreversed=reverse(input);console.log(reversed);// Output: "!dlroW ,olleH"