根据整数生成日期范围

Question

I have an array like this [0,1,2,3 .. 23] and they means hour in a day. How to use moment js to convert them to 12 hour then do date range?

my desire output is

['12am-1am','1am-2am','2am-3am' .. 11pm-12am]

my attempt failed coz I thought I don't need moment https://jsfiddle.net/s4L7hj1a

Answer 1

You don't need moment.js

 var getFormattedHour = function(hour) { return (hour % 12 ? hour % 12 : 12) + ':00 ' + ((hour < 12) || (hour >= 24) ? 'AM' : 'PM'); } var getHourRange = function(hour) { return getFormattedHour(hour) + ' - ' + getFormattedHour(hour + 1); } var hours = []; for(var hour = 0; hour < 24; hour++) { hours.push(hour); } hours.map(function(hour) { console.log(getHourRange(hour)); }); 

Answer 2

Using moment.js:

const moment = require('moment');

const start = moment().startOf('day');

const times = 24; // 24 hours   

for (let i = 0; i < times; i++) {
    const toPrint = moment(start)
        .add(60 * i, 'minutes')
        .format('hh:mm A');

         console.log(toPrint);
}

This will give yo:

12:00 AM 
01:00 AM 
02:00 AM 
... 
...
10:00 PM 
11:00 PM 

then you can add them in array as you like