2023-08-15.js

// https://www.codewars.com/kata/52449b062fb80683ec000024/train/javascript

function generateHashtag( str ) {
	const strArr = str.split( ' ' );

	if ( strArr.every( ( word ) => !word ) ) return false;

	const hashtag = '#' + strArr
		.map( ( word ) => word ? word[0].toUpperCase() + word.slice( 1 ) : null )
		.join( '' );

	return hashtag.length > 140 ? false : hashtag;
}
console.log( generateHashtag( 'Codewars Is Nice' ) ); // :>> #CodewarsIsNice
console.log( generateHashtag( 'Codewars is nice' ) ); // :>> #CodewarsIsNice
console.log( generateHashtag( '' ) );
console.log( generateHashtag( '    ' ) );
console.log( generateHashtag( 'code' + ' '.repeat( 140 ) + 'wars' ) );
console.log( generateHashtag( 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' ) );
console.log( generateHashtag( '  a  bb  ccc  dddd  eeeee  ffffff  ggggggg  hhhhhhhh  iiiiiiiii  jjjjjjjjjj  kkkkkkkkkkk  llllllllllll  mmmmmmmmmmmmm  nnnnnnnnnnnnnn  ooooooooooooooo  pppppppppppppppp  qqq' ) );