get objects from an array by name at one array iteration

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is there a way to get values from an array by fields at once?

for example there is an array of objects

const arr = [
    {
        name: 'tomato',
        value: 20,
    },
    {
        name: 'apple',
        value: 44,
    },
    {
        name: 'mango',
        value: 36,
    }
]

from this array I need to get all objects by name. And in a result a need 3 object. The one way is to find each object in an array by name

const tomato = arr.find(item => item.name === 'tomato')
const apple = arr.find(item => item.name === 'apple')
const mango = arr.find(item => item.name === 'mango')

is there others way how can I get object from an array by name? is it possible to do at one array iteration?

Using reduce() and object destructuring

const arr = [{name:"tomato",value:20},{name:"apple",value:44},{name:"mango",value:36}];

const { tomato, apple, mango } = arr.reduce((a, i) => ({...a, [i.name]: i.value}), {})

console.log(tomato, apple, mango)

How to loop through an array containing objects and access their , Some use cases of looping through an array in the functional programming 300 console.log(index); // 0, 1, 2 console.log(array); // same myArray object 3 times }); {name: "bob", age:67} ]; const john = people.find(person => person. name� Step 4 — Reformatting Array Objects.map() can be used to iterate through objects in an array and, in a similar fashion to traditional arrays, modify the content of each individual object and return a new array. This modification is done based on what is returned in the callback function.

It is possible to use Map collection:

let uniqueArr= new Map(arr.map(s=> [s.name, s]))

An example:

const arr = [
    {
        name: 'tomato',
        value: 20,
    },
    {
        name: 'apple',
        value: 44,
    },
    {
        name: 'mango',
        value: 36,
    }
]

let uniqueArr = new Map(arr.map(s=> [s.name, s]))

console.log(uniqueArr.get('tomato'))
console.log(uniqueArr.get('apple'))
console.log(uniqueArr.get('mango'))

Iterating over arrays and objects in JavaScript, array methods (courtesy of ECMAScript 5 [1]),; listing property keys. It concludes with best practices for applying these approaches. for loops. All� Array() Creates a new Array object. Static properties get Array[@@species] The constructor function is used to create derived objects. Static methods Array.from() Creates a new Array instance from an array-like or iterable object. Array.isArray() Returns true if the argument is an array, or false otherwise. Array.of()

const arr = [
    {
        name: 'tomato',
        value: 20,
    },
    {
        name: 'apple',
        value: 44,
    },
    {
        name: 'mango',
        value: 36,
    }
]

function getObjects(args){

  var output = [];
  
  args.forEach(name => {
  
    arr.forEach(elem => {

      if(name === elem.name)
        output.push(elem)

    });
     
  });

  return output;
}

var args = ['mango', 'tomato'];

var objs = getObjects(args);

objs.forEach(elem => console.log(elem));

Array.prototype.forEach(), the value of the element; the index of the element; the Array object being traversed Array methods: every() , some() , find() , and findIndex() test the array defineProperty(copy, name, desc) }) return copy } const obj1 = { a: 1,� Note. Variable iteration supports an offset argument. The offset must come after the name of the iteration, such as copyIndex('diskNames', 1). If you don't provide an offset value, it defaults to 0 for the first instance.

Array, The JavaScript Array class is a global object that is used in the dot notation) will not set or retrieve an element from the array list itself forEach(function(item, index, array) { console.log(item, index) }) // Apple 0 // Banana 1 an array as follows throws a syntax error because the property name is not valid: arrayLikeColors is an array-like object. In order to iterate over its items, you have to call indirectly forEach() using the call(). The forEach() method is taken from Array.prototype. Alternatively, you can transform the array-like object into an array using Array.from(), then iterate:

Looping over arrays and objects in JavaScript, A simple while loop using the array index can get the job done, as seen below. One other tool for iterating over loops is worth mentioning: forEach . Using a for ..in loop, we can iterate over this object by property name to� The use case for this syntax over using the dot notation (Array.prototype.values()) is in a case where you don't know what object is going to be ahead of time. If you have a function that takes an iterator and then iterate over the value, but don't know if that Object is going to have a [Iterable].prototype.values method.

Array methods, forEach method allows to run a function for every element of the array In real life arrays of objects is a common thing, so the find method is But for us an array of names would be much more comfortable than a single string. Array.map() The map() method creates a new array by performing a function on each array element. The map() method does not execute the function for array elements without values. The map() method does not change the original array. This example multiplies each array value by 2:

How To Use .map() to Iterate Through Array Items in JavaScript , Step 1 — Calling a Function on Each Item in an Array const name = "Sammy" const map = Array.prototype.map const newName = map.call(name, .map() can be used to iterate through objects in an array and, in a similar fashion to traditional arrays, modify You get paid; we donate to tech nonprofits. Everything you wanted to know about arrays. 07/07/2020; 24 minutes to read; In this article. Arrays are a fundamental language feature of most programming languages. They're a collection of values or objects that are difficult to avoid.

Comments
  • Is it always going to be tomato, apple, mango? Because then you should rather use an object.
  • this objects store in an array
  • Use a regular for...of loop and store them in separate variables.
  • I mean like that: const fruits = {tomato: 20, apple: 44, mango: 46}; You can also map it to that form with a reduce on your current arr.
  • can there be duplicate tomato item? You just want to find the first one? So what if you use one iteration, and you give 3 names, then stop as soon as one is found for each name?
  • would it need to handle [{name:"tomato",value:20},{name:"apple",value:44},{name:"mango",value:36}, {name:"tomato",value:10000}];