Retrieve the current day's value from an array

Question

Retrieve the current day's value from an array

I have a list of days with corresponding opening and closing hours, now I need to find the operating hours for today. For instance, if it's Friday, then the current hours should be "11:30 AM – 9:30 PM". How can I achieve this using JavaScript?

["Monday: 11:30 AM – 2:30 PM, 5:30 – 10:30 PM", "Tuesday: 11:30 AM – 2:30 PM, 5:30 – 10:30 PM", 
 "Wednesday: 11:30 AM – 2:30 PM, 5:30 – 10:30 PM", "Thursday: 11:30 AM – 2:30 PM, 5:30 – 10:30 PM", 
 "Friday: 11:30 AM – 9:30 PM", "Saturday: 11:30 AM – 9:30 PM", 
"Sunday: 11:30 AM – 9:00 PM"]

let currentTime = new Date().toString().split(' ')[4];
let a = currentTime.split(':');
if(a[2]>1){
  a[1]=parseInt(a[1])+1
}
let hours = a[0]
let minutes = a[1]

Furthermore, how do I determine if a specific time (e.g., 15:02:01pm) falls within the operating hours like between 11:30 AM – 2:30 PM or 15:02:01pm between 11:30 AM – 2:30 PM, 5:30 – 10:30 PM?

javascript

Answer 1

Answer №1

Retrieve the current day of the week ranging from 0 (Sunday) to 6 (Saturday):

const today = new Date().getDay();

Adjust it to align with the array, where 0 represents Monday:

const today = (new Date().getDay() + 6) % 7;

Eliminate the day name in the corresponding entry:

const values = ["Monday: 11:30 AM – 2:30 PM, 5:30 – 10:30 PM", …];
const value = values[today].split(': ')[1];

Creating a function for parsing input time might be helpful at this stage, returning the minutes passed since midnight:

const parseInputTime = time => {
    const [hours, minutes] = time.split(':').map(Number);

    return 60 * hours + minutes;
};

The process of parsing time within a range is similar:

const parseRangeTime = time => {
    const parts = time.split(/[: ]/);
    const hours = parseInt(parts[0], 10) + (parts[2] === 'PM' ? 12 : 0);
    const minutes = parseInt(parts[1], 10);

    return 60 * hours + minutes;
};

Now you can utilize these functions and compare the outcomes:

const [start, end] = value.split(' – ');
const isInRange =
    parseInputTime(currentTime) >= parseRangeTime(start) &&
    parseInputTime(currentTime) < parseRangeTime(end);

complete demonstration

Answer 2

Retrieve the current day of the week ranging from 0 (Sunday) to 6 (Saturday):

const today = new Date().getDay();

Adjust it to align with the array, where 0 represents Monday:

const today = (new Date().getDay() + 6) % 7;

Eliminate the day name in the corresponding entry:

const values = ["Monday: 11:30 AM – 2:30 PM, 5:30 – 10:30 PM", …];
const value = values[today].split(': ')[1];

Creating a function for parsing input time might be helpful at this stage, returning the minutes passed since midnight:

const parseInputTime = time => {
    const [hours, minutes] = time.split(':').map(Number);

    return 60 * hours + minutes;
};

The process of parsing time within a range is similar:

const parseRangeTime = time => {
    const parts = time.split(/[: ]/);
    const hours = parseInt(parts[0], 10) + (parts[2] === 'PM' ? 12 : 0);
    const minutes = parseInt(parts[1], 10);

    return 60 * hours + minutes;
};

Now you can utilize these functions and compare the outcomes:

const [start, end] = value.split(' – ');
const isInRange =
    parseInputTime(currentTime) >= parseRangeTime(start) &&
    parseInputTime(currentTime) < parseRangeTime(end);

complete demonstration

Answer 3

Answer №2

Yes, this method is effective.

const appointments = ["Monday: 9:00 AM – 2:00 PM", "Tuesday: 10:00 AM – 3:00 PM", 
 "Wednesday: 8:30 AM – 1:30 PM", "Thursday: 11:30 AM – 4:30 PM", 
 "Friday: 7:00 AM – 12:00 PM", "Saturday: 9:00 AM – 5:00 PM", 
"Sunday: Closed"]

let currentDay = new Date().toLocaleString('en-us', { weekday: 'long' })

let todaySchedule = '';

for (let j=0; j < appointments.length; j++) {
  if (appointments[j].indexOf(currentDay) !== -1 ) {
    todaySchedule = appointments[j].substr(currentDay.length + 2)
  }
}

console.log(todaySchedule);

Answer 4

Yes, this method is effective.

const appointments = ["Monday: 9:00 AM – 2:00 PM", "Tuesday: 10:00 AM – 3:00 PM", 
 "Wednesday: 8:30 AM – 1:30 PM", "Thursday: 11:30 AM – 4:30 PM", 
 "Friday: 7:00 AM – 12:00 PM", "Saturday: 9:00 AM – 5:00 PM", 
"Sunday: Closed"]

let currentDay = new Date().toLocaleString('en-us', { weekday: 'long' })

let todaySchedule = '';

for (let j=0; j < appointments.length; j++) {
  if (appointments[j].indexOf(currentDay) !== -1 ) {
    todaySchedule = appointments[j].substr(currentDay.length + 2)
  }
}

console.log(todaySchedule);

Answer 5

Answer №3

Give this a try

let schedule = ["Monday: 11:30 AM – 2:30 PM, 5:30 – 10:30 PM", "Tuesday: 11:30 AM – 2:30 PM, 5:30 – 10:30 PM",
 "Wednesday: 11:30 AM – 2:30 PM, 5:30 – 10:30 PM", "Thursday: 11:30 AM – 2:30 PM, 5:30 – 10:30 PM",
 "Friday: 11:30 AM – 9:30 PM", "Saturday: 11:30 AM – 9:30 PM",
"Sunday: 11:30 AM – 9:00 PM"];

for(let j=0; j<schedule.length; j++){console.log(schedule[j].substring(0,schedule[j].indexOf(':')));}

Answer 6

Give this a try

let schedule = ["Monday: 11:30 AM – 2:30 PM, 5:30 – 10:30 PM", "Tuesday: 11:30 AM – 2:30 PM, 5:30 – 10:30 PM",
 "Wednesday: 11:30 AM – 2:30 PM, 5:30 – 10:30 PM", "Thursday: 11:30 AM – 2:30 PM, 5:30 – 10:30 PM",
 "Friday: 11:30 AM – 9:30 PM", "Saturday: 11:30 AM – 9:30 PM",
"Sunday: 11:30 AM – 9:00 PM"];

for(let j=0; j<schedule.length; j++){console.log(schedule[j].substring(0,schedule[j].indexOf(':')));}

Answer 7

Answer №4

Feel free to give this a try. I've made some changes to how the data is being stored.

var array  = [
            {name: "Monday", value :"11:30 AM – 2:30 PM, 5:30 – 10:30 PM"}, 
            {name: "Tuesday", value :"11:30 AM – 2:30 PM, 5:30 – 10:30 PM"}, 
            {name: "Wednesday", value :"11:30 AM – 2:30 PM, 5:30 – 10:30 PM"}, 
            {name: "Thursday",  value :"11:30 AM – 2:30 PM, 5:30 – 10:30 PM"}, 
            {name: "Friday  ", value : "11:30 AM – 9:30 PM"}, 
            {name: "Saturday", value : "11:30 AM – 9:30 PM"}, 
            {name: "Sunday  ", value : "11:30 AM – 9:00 PM"}
           ];
            
           function myFunction() {
            var obj = array.filter(function ( obj ) {
            return obj.name === 'Wednesday';
            })[0];
        
            window.alert(obj.value);  
           }

<!DOCTYPE html>
<html>
  <body>
        <button onclick="myFunction()">Click me</button>
  </body>
</html>

Answer 8

Feel free to give this a try. I've made some changes to how the data is being stored.

var array  = [
            {name: "Monday", value :"11:30 AM – 2:30 PM, 5:30 – 10:30 PM"}, 
            {name: "Tuesday", value :"11:30 AM – 2:30 PM, 5:30 – 10:30 PM"}, 
            {name: "Wednesday", value :"11:30 AM – 2:30 PM, 5:30 – 10:30 PM"}, 
            {name: "Thursday",  value :"11:30 AM – 2:30 PM, 5:30 – 10:30 PM"}, 
            {name: "Friday  ", value : "11:30 AM – 9:30 PM"}, 
            {name: "Saturday", value : "11:30 AM – 9:30 PM"}, 
            {name: "Sunday  ", value : "11:30 AM – 9:00 PM"}
           ];
            
           function myFunction() {
            var obj = array.filter(function ( obj ) {
            return obj.name === 'Wednesday';
            })[0];
        
            window.alert(obj.value);  
           }

<!DOCTYPE html>
<html>
  <body>
        <button onclick="myFunction()">Click me</button>
  </body>
</html>

Retrieve the current day's value from an array

Answer №1

Answer №2

Answer №3

Answer №4

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