Replace 3rd element with regular expression in javascript-CodePudding

I am getting an array like below after doing the matches. [ '10 am', '5 pm', 'by appointment only' ] I would like to append text to only for time and return in this format.

"10 am to 5 pm by appointment only"

But when I join like below

[ '10 am', '5 pm', 'by appointment only' ].join( 'to' );

I am getting result as

"10 am to 5 pm to by appointment only"

So with the help of regular expression is there a way to to remove 'to' only from 3rd element of array so that when joining it won't append 'to ' again.

CodePudding user response：

const [start,end,describe] = [ '10 am', '5 pm', 'by appointment only' ];
const finalText = `${start} to ${end} ${describe}`;
console.log(finalText)

CodePudding user response：

You can use Array.prototype.reduce():

const arr = ['10 am', '5 pm', 'by appointment only']
const result = arr.reduce((a, c, i) => (a  = c   (i ? ' ' : ' to '), a), '')

console.log(result)