Array "includes" returns false, but item exists [closed]

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What am I doing wrong?

Here is my code:

let weekends_test=[6,5];
let day_of_week_curr=moment.unix(curr_time).format('e'); //returns 6 (I'm using moment.js library)
console.log (weekends_test.includes(day_of_week_curr)) //returns false, but true expected

indexOf instead includes returns "-1"

Maybe other way to find a value exists? Except "for" cycle?

• jonrsharpe: [6, 5].includes("6") is false...
• Pointy: When you format a date, you get a string. The array "search" functions perform comparisons as if they were using ===, so the data type of the values (string versus number) matters.
• Владислав Светайло: Thank you so much, @jonrsharpe, console.log (weekends_test.includes(Number(day_of_week_curr))) solves this problem
• Mr. Polywhirl: Moment is EOL (end of life), also you can do this fairly easily with a raw Date object i.e. console.log("Is Weekend:", [0, 6].includes(new Date().getDay())) Using a date framework in 2025 might be overkill. The I18n (Intl) packages offer a lot of features now.
• Владислав Светайло: @MrPolywhirl, I haven't figured out how to use native functions to get a timestamp in a strictly defined timezone. How to get a timestamp when changing between winter and summer time. How to quickly get the start of day timestamp from the current timestamp. Moment.js is still useful.

Answer 1

moment.format returns a string, so you should convert it to a number:

let day_of_week_curr=parseInt(moment.unix(curr_time).format('e'));

• Владислав Светайло: Thank you, Alexander, the code weekends_test.includes(Number(day_of_week_curr)) also solved an issue, My reputation is low, so I cannot mark your answer as useful, but anyway, thank you.
• Alexander Nenashev: @mplungjan i didnt read the comment, was answering and there's no rule that prohibits posting an answer that already covered in the comments, actually i encounter that's even encouraged 🤷‍♂️
• Alexander Nenashev: @mplungjan it's definitely not a typo, but a bug
• mplungjan: We are missing the "this is trivial" and it is likely a dupe too