Count the number of booleans (JavaScript)-CodePudding

Let my object have the following data:

{
  mongoose: {
    name: "Starky",
    age: 3,
    playful: false
  },
  dog: {
    name: "Maks",
    age: 7,
    playful: false
  },
  parrot: {
    name: "Petty",
    age: 4,
    playful: true
  }
}

How can i count the number of booleans?
I know that I can use .reduce, but I didn’t understand exactly how to use it correctly, in an attempt to use it, I just got undefined.

CodePudding user response：

you can do something like this

to check if it is a boolean I have used !! and ===

const countBoolean = data => Object
.entries(data)
.reduce((res, [k, v]) => {
  return res   Object.values(v).filter(value => value === !!value).length
}, 0)

const data = {
  mongoose: {
    name: "Starky",
    age: 3,
    playful: false
  },
  dog: {
    name: "Maks",
    age: 7,
    playful: false
  },
  parrot: {
    name: "Petty",
    age: 4,
    playful: true
  }
}

console.log(countBoolean(data))

CodePudding user response：

Here,

var d = {
  mongoose: {
    name: "Starky",
    age: 3,
    playful: false
  },
  dog: {
    name: "Maks",
    age: 7,
    playful: false
  },
  parrot: {
    name: "Petty",
    age: 4,
    playful: true
  }
}
console.log('Data',d) //Console for data

function cc(){ //Create function
    let totalBool=0;
    let totalTrue=0;
    let totalFalse=0;
Object.keys(d).forEach((x)=>{
    let dd = Object.keys(d[x]);
    dd.forEach((y)=>{
        if(typeof(d[x][y])=='boolean')
            {totalBool  }
        if(d[x][y]==true)
            {totalTrue  }
        if(d[x][y]==false)
            {totalFalse  }
    })})
    console.log('TotalBool :',totalBool);
    console.log('TotalTrue :',totalTrue);
    console.log('TotalFalse :',totalFalse);}
console.log(cc()) // Console for know bool value