CODEWITHSUNDEEP
javascript
jorts
jorts

Reputation: 21

How do I check if any multiple variables are true?

For instance, say I have a list of 6 boolean variables. If any 3 of these are true, do something.

In my particular case, I'm looking at something like this: 

var categoriesClicked = [];
if (category1Clicked) {
  categoriesClicked.push('category1Clicked');
}
if (category2Clicked) {
  categoriesClicked.push('category2Clicked');
}
...
if (categoriesClicked.length > 3) {
  //User clicked at least 3 categories, do something
}

Would this be the best way?

Upvotes: 1

Views: 1206

Answers (3)

Mamun
Mamun

Reputation: 68933

You can make use of an array of the values, then filter the true values to get the length.

Demo:

var valueArray = [true, true, false, true, false, false];
var trueValCount = valueArray.filter(v => v).length;
if (trueValCount === 3) {
  console.log('Has 3 true value');
}

Upvotes: 2

Ivar
Ivar

Reputation: 6838

You can abuse the + operator, as that converts true to 1 and false to 0. (Specification)

Just add your booleans together and see if they equal to 3

let b1, b2, b3, b4, b5, b6;
b1 = b2 = b3 = true;
b4 = b5 = b6 = false;

console.log(b1 + b2 + b3 + b4 + b5 + b6 === 3);

Upvotes: 3

Desi boys
Desi boys

Reputation: 29

you can keep track of count using numeric value. unnecessary creating map would not be suggestible. like

var count=0;
if(category1Clicked){
 count = count+1;
}
if(category2Clicked){
 count = count+1;
}
...
if(count >= 3){
//User clicked at least 3 categories, do something
}

Upvotes: 0

Related Questions