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find average of an array of objects


find average of an array of objects

By : Cynthia Gonzales
Date : November 20 2020, 07:00 PM
I wish this helpful for you You can filter out "females" to a new array, and then reduce that down to a total of all ages, then use the length of the females array to divide the total by:
code :
const people = [{name:'Sarah', gender:'female', age:25}, {name:'Tom', gender:'male', age:18}, {name:'Tim', gender:'male', age:65}, {name:'Kim', gender:'female', age:58}];

const females = people.filter(person => person.gender === 'female');

const average = females.reduce((total, next) => total + next.age, 0) / females.length;

console.log(average);


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Find average of array using only average of 2 members at a time

Find average of array using only average of 2 members at a time


By : Ankur Bakshi
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Seems like you could use mergesort-esque logic here...
If you have cups 1,2,3,4,5,6,7,8...
Get average value from array consisting of objects based on objects fields

Get average value from array consisting of objects based on objects fields


By : thelord
Date : March 29 2020, 07:55 AM
will be helpful for those in need I have a document of the following structure: , You can use $map to with $avg to output avg in 3.2 mongo version.
code :
db.col_name.aggregate(
[{"$project":{
  "avgMetrics":{
    "$avg":{
      "$map":{
        "input":"$powerMetrics",
         "as":"val",
         "in":{"$divide":["$$val.powerConsumption","$$val.duration"]}
      }
    }
  }
}}])
Find Average using Array of Objects/Object Array

Find Average using Array of Objects/Object Array


By : Charan Kumar
Date : March 29 2020, 07:55 AM
may help you . Your approach is wrong. Your Height class appears to be responsible for the evaluation of the mean value. Hence, you should put all values inside a single Height instance, instead of generating a new instance for each user value.
However, h is an array of Heights object, while print() method is defined on a single Height instance. In order to call such method, you have to access one of the objects contained in h, that is h[0].print().
MongoDB Find the average value from arrays of objects

MongoDB Find the average value from arrays of objects


By : nanobot
Date : March 29 2020, 07:55 AM
Hope this helps This aggregation job will return average of mathematics marks throughout the collection
code :
db.collection.aggregate([
  {
    $unwind: "$group.syllabus.subjects"
  },
  {
    $match: {
      "group.syllabus.subjects.titel_of_sub": "Mathematics"
    }
  },
  {
    $group: {
      _id: null,
      avg_math_marks: {
        $avg: "$group.syllabus.subjects.mark"
      }
    }
  }
])
LINQ find average from CSV objects

LINQ find average from CSV objects


By : Shoeb
Date : March 29 2020, 07:55 AM
Hope this helps I have a CSV with stock info in it (that I have a list of DailyValues objects called stockValues) that I need to pull from. It looks like this: , Can you try something like:
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