CFP - Docs - sumValues

sumValues

```
(collection: Numbers) => number
```

Return the sum of a collection's values

sumValues([1, 3]) // is 4
sumValues([1, 3]) // is 4

Try It

sumValues([1, 3]) // is 4
sumValues([1, 3]) // is 4

We often want to total up some numbers. Below, Jen and Mike went out to breakfast. Let's figure their subtotal.

Try It

const order = {
  jen: {
    'eggs and more': 9.5,
    coffee: 2,
  },
  mike: {
    'chicken and waffles': 11,
    espresso: 3,
  },
}

const getSubtotal = compose([mapValues(sumValues), sumValues])

const subtotal = getSubtotal(order)
console.log(subtotal) // is 25.50
type Order = Record<string, Record<string, number>>
const order: Order = {
  jen: {
    'eggs and more': 9.5,
    coffee: 2,
  },
  mike: {
    'chicken and waffles': 11,
    espresso: 3,
  },
}

const getSubtotal = compose([mapValues(sumValues)<Order>, sumValues])

const subtotal = getSubtotal(order)
console.log(subtotal) // is 25.5

Try It

const order = {
  jen: {
    'eggs and more': 9.5,
    coffee: 2,
  },
  mike: {
    'chicken and waffles': 11,
    espresso: 3,
  },
}

const getSubtotal = compose([
  mapValues(sumValues),
  sumValues,
])

const subtotal = getSubtotal(order)
console.log(subtotal) // is 25.50
type Order = Record<
  string,
  Record<string, number>
>
const order: Order = {
  jen: {
    'eggs and more': 9.5,
    coffee: 2,
  },
  mike: {
    'chicken and waffles': 11,
    espresso: 3,
  },
}

const getSubtotal = compose([
  mapValues(sumValues)<Order>,
  sumValues,
])

const subtotal = getSubtotal(order)
console.log(subtotal) // is 25.5