function *fibonaciSeries(){ let first = 0; let second = 0; let third = 0; let i = 0; while(true) { if(i== 0 || i==1) { first = 1; second =1; third = 1; } else { first = second; second = third; third = first + second; } i+=1; yield third; } } fibo = fibonaciSeries(); for(let i=0; i< 10; i++) { val = fibo.next(); console.log(val.value); } You can call infinite loop or call .next() as much you want

Question: 1 a = [1,2,3,4]; a['abc']="5"; a.length =0; console.log(a[2]);// ? console.log(a.abc);// ? Question: 2 a = {a: 1, b: 2, c: null, d: undefined}; b = JSON.parse(JSON.stringify(a)); console.log(b);//? Question: 3 //Write code such that, if I write a = [...10] //Now if I print a, then output should be console.log(a);//[1,2,3,4,5,6,7,8,9,10]

I am not sure. Actually r2_score defined the accuracy. So if accuracy is very low then its denote linear model is not fit for this data. Normally I consider 50%, if r2_score less then 50% means not-linear and for non-linear r2_score can go negative.

Please link the mdn url of each function. It will help to read also find all the functions in single place. Like Lenght Method

Our application TTT not support hotlinking. Its not good. Our each s3 url have url authentication process before access content.

Mike Schinkel Yes, If its frontend

Yes, you can use Webpack or Gulp.js or Babeljs for convert your ES6 code to ES5 code. https://medium.com/@zural143/basic-webpack-4-and-es5-to-es6-transpiler-using-babel-dc66e72c86c6 https://www.sitepoint.com/es6-babel-webpack/

Afreen Rahman In js '+' operator used for Concatination Type casting to Number Sum Example 12 +'12' // 1212 string 'abc' + 12 // 12abc string 'abc' + 12 for addition left and right should be numbers. But left side value is string. So convert 12 to String and then perform string concatenation +'12' // Number('12') 12 +'abc' // Number('abc') NaN +'12a'// Number('12a') NaN Nothing is present in left side, so it will type cast '12' to number using Number() 12 +12 // 24 Both left and Right side are number, so simply perform addition For any doubt, feel free to comment!! May be JavaScript null, undefined, 0, empty string, NaN Are Not Same article give you more knowledge on type casting

sum = (a,b)=>{ if(b) { return a + b } else { return (d)=> { return a + d; } } } console.log(sum(3, 20)) console.log(sum(13)(20))

Congrts!!