Again part of my breaking out of jQuery and back into vanilla JavaScript
Filter, Map and Reduce examples
const dragonEvents = [
{type: 'attack', value: 12, target: 'dorkman'},
{type: 'yawn', value: 40},
{type: 'eat', target: 'horse'},
{type: 'attack', value: 23, target: 'fluffy'},
{type: 'attack', value: 12, target: 'dorkman'},
{type: 'attack', value: 3, target: 'dorkman'},
{type: 'attack', value: 10, target: 'dorkman'}
]
const totalDamageToDorkman = dragonEvents
.filter(event => event.type === 'attack')
.filter(event => event.target === 'dorkman')
.map(event => event.value)
.reduce((prev, value) => (prev || 0) + value)
const targets = dragonEvents
.filter(event => event.target)
.map(event => event.target)
const findFluffy = dragonEvents
.filter(event => event.target === 'fluffy')
const totalAttackPoints = dragonEvents
.filter(event => event.value) // Filter out null or undefined event.value
.map(event => event.value) // Push to the new array only event.value
.reduce((total, event) => (total | 0) + event) // Sum the array
// .reduce((total, event) => { return total + event}, 0) //Does the dame thing but specifies starting value
console.log('Total:\n' + totalDamageToDorkman);
console.log(JSON.stringify(targets, null, 2));
console.log(findFluffy);
console.log(totalAttackPoints);
Tanks to Fun Fun Functions and Mattias Petter Johansson