[javascript] Javascript reduce on array of objects

You can use reduce method as bellow; If you change the 0(zero) to 1 or other numbers, it will add it to total number. For example, this example gives the total number as 31 however if we change 0 to 1, total number will be 32.

const batteryBatches = [4, 5, 3, 4, 4, 6, 5];

let totalBatteries= batteryBatches.reduce((acc,val) => acc + val ,0)

Examples related to javascript

need to add a class to an element How to make a variable accessible outside a function? Hide Signs that Meteor.js was Used How to create a showdown.js markdown extension Please help me convert this script to a simple image slider Highlight Anchor Links when user manually scrolls? Summing radio input values How to execute an action before close metro app WinJS javascript, for loop defines a dynamic variable name Getting all files in directory with ajax

Examples related to functional-programming

Dart: mapping a list (list.map) Index inside map() function functional way to iterate over range (ES6/7) How can I count occurrences with groupBy? How do I use the includes method in lodash to check if an object is in the collection? Does Java SE 8 have Pairs or Tuples? Functional style of Java 8's Optional.ifPresent and if-not-Present? What is difference between functional and imperative programming languages? How does functools partial do what it does? map function for objects (instead of arrays)

Examples related to node.js

Hide Signs that Meteor.js was Used Querying date field in MongoDB with Mongoose SyntaxError: Cannot use import statement outside a module Server Discovery And Monitoring engine is deprecated How to fix ReferenceError: primordials is not defined in node UnhandledPromiseRejectionWarning: This error originated either by throwing inside of an async function without a catch block dyld: Library not loaded: /usr/local/opt/icu4c/lib/libicui18n.62.dylib error running php after installing node with brew on Mac internal/modules/cjs/loader.js:582 throw err DeprecationWarning: Buffer() is deprecated due to security and usability issues when I move my script to another server Please run `npm cache clean`

Examples related to reduce

Javascript reduce() on Object How to use filter, map, and reduce in Python 3 What is the 'pythonic' equivalent to the 'fold' function from functional programming? Finding the average of a list NameError: name 'reduce' is not defined in Python Javascript reduce on array of objects