Question 344325 in Javascript Question posted in
A very good W3school tutorial can be found here.

Switch case with boolean JavaScript

I would like to avoid redundant if, for this I wanted to set up a switch/case. My goal is to look in my JSON object if for a day associated boolean is true or false. In the case or if it is true I add the number of the day in a table.

My object:

let days = [

{
  "monday": true,
  "tuesday": true,
  "wednesday": true,
  "thursday": true,
  "friday": true,
  "saturday": true,
  "sunday": true
}
]

What I tried but it’s not working:

  let nbrsDay = []
    Object.getOwnPropertyNames(days).forEach(function (key) {
        switch (key) {
            case "monday" === true:
                nbrsDay .push(2);
                break;
            case "tuesday" === true:
                nbrsDay .push(3);
                break;
            case "wednesday" === true:
                nbrsDay .push(4);
                break;
            case "thursday" === true:
                nbrsDay .push(5);
                break;
            case "friday" === true:
                nbrsDay .push(6);
                break;
            case "saturday" === true :
                nbrsDay .push(7);
                break;
            case "sunday"  === true:
                nbrsDay .push(1);
                break;
        }
    });
    return nbrsDay

Someone have a method to do this?

Tags:

2

Answers


  1. 0 
    let daysArray = ["sunday", "monday", "tuesday", "wednesday", "thursday", "friday", "saturday"]

let nbrOfDay = []

let daysObject= {
  "monday": true,
  "tuesday": true,
  "wednesday": true,
  "thursday": true,
  "friday": true,
  "saturday": true,
  "sunday": true
}

Object.keys(daysObject).forEach(function (key) {
    if(daysObject[key]){
        let keyIndex = daysArray.indexOf(key)+1
        nbrOfDay.push(keyIndex)
    }
})

console.log(nbrOfDay)
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  2. 0

    simply:

    const 
  days = [{ monday: true, tuesday: true, wednesday: true, thursday: true, friday: true, saturday: true, sunday: true }] 
, daysCount = { monday: 2, tuesday: 3, wednesday: 4, thursday: 5, friday: 6, saturday: 7, sunday: 1} 
  ;   

let nbrsDay = Object.keys(days[0]).reduce( (nbrs,dayName) => 
  {
  if (days[0][dayName])
    nbrs.push(daysCount[dayName]);
  return nbrs
  }, []);
 
console.log('nbrsDay =', JSON.stringify(nbrsDay) );
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