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- Viewed 218 timesanswered Oct 16, 2018 at 8:38function greetDevelopers(list1) {const greetings = list1.map(person => {return Object.assign( // add return before Object.assign{ firstName: person.firstName },{ lastName: person.lastName },{ country: person.country },{ continent: person.continent },{ age: person.age },{ language: person.language },{greeting: `Hi ${person.firstName}, what do you like the most about ${person.language}?`});});return greetings;}Content Under CC-BY-SA license
javascript - how to create and new object when using map
WEBOct 16, 2018 · You could take the object and add just the new property by taking a copy of the old properties. let greetings1 = list1.map(person => Object.assign( {}, person, { greeting: `Hi ${person.firstName}, what do you like the most about …
map function for objects (instead of arrays) - Stack Overflow
WEBFeb 11, 2013 · If anyone was looking for a simple solution that maps an object to a new object or to an array: // Maps an object to a new object by applying a function to each key+value pair.
javascript - Using `map` to Create New Array of Objects with …
WEBDec 17, 2019 · You can create a new object on the arrow function from the map: const filteredConfigurableModules = configurableModules.map(module => ({ name: module.name, configurables: module.configurables }) ); this return an array of objects with name and …
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Javascript map function :add new key and value to object
WEBMar 14, 2018 · I would like to add a new key (eg:isApproved) to each object in the existing array expected output: var array= [{id:1,name:'foo',isApproved:true},{id:2,name:'bar',isApproved:true}]
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javascript - How to initialize a Map in ES6/ES2015 similar to an …
WEBOct 1, 2015 · The closest you can get is: let object = new Map([. ['foo', 'bar'], ['1', 42] ]); Important things to notice: Object properties are identified by strings, while Map keys can be any value, so make sure all keys are strings in the input array. Iterating a Map object …
javascript - JS map return object - Stack Overflow
WEBDec 16, 2017 · The cleanest solution is to use the spread syntax to generate the new objects: const launchOptimistic = rockets.map(rocket => { return { ...rocket, launches: rocket.launches + 10 }; });
javascript - Quickly creating a Map of objects from an Array of …
WEBJan 20, 2017 · var objects = [{ id: 1, name: "one" }, { id: 2, name: "two" }]; And I'm converting these to a Map by using the id property of each object as Map keys: var map = new Map(); objects.forEach(obj => map.set(obj.id, obj)); However, I'd like to do the …
arrays - Convert Map to JavaScript object - Stack Overflow
WEBYou could loop over the map and over the keys and assign the value. function createPaths(aliases, propName, path) {. aliases.set(propName, path); } var map = new Map(), object = {}; createPaths(map, 'paths.aliases.server.entry', 'src/test'); …
javascript - ES6 map an array of objects, to return an array of …
WEBI have an array of objects: id: 1, name: 'bill'. }, id: 2, name: 'ted'. Looking for a simple one-liner to return: value: 1, text: 'bill'.
dictionary - Map vs Object in JavaScript - Stack Overflow
WEBES6 spec requires the new operator to be used with the Map symbol i.e. new Map for it to create a map object. var a = {} is shorthand for (meaning equivalent to) var a = Object.create(Object.prototype)
javascript - How to convert Map to array of object ... - Stack …
WEBJun 27, 2019 · Spread a map into an array of arrays. const map = new Map().set('a', 1).set('b', 2).set('c', 3) const mapArr = [...map] // array of arrays. Map each subarray as key - value pairs. map function returns a new array containing object of key - value pairs.
javascript - How to convert a plain object into an ES6 Map?
WEBApr 15, 2016 · Converting an Object to a Map. The new Map() constructor accepts an iterable of entries. With Object.entries, you can easily convert from Object to Map: const obj = { foo: 'bar', baz: 42 }; const map = new Map(Object.entries(obj)); console.log(map); // …
javascript - Creating object with dynamic keys - Stack Overflow
WEBIn the new ES2015 standard for JavaScript (formerly called ES6), objects can be created with computed keys: Object Initializer spec. The syntax is: [myKey]: value, If applied to the OP's scenario, it would turn into: var inputs = $('div.quantity > input').map(function(){. …
Dynamically add data to a javascript map - Stack Overflow
WEBNov 12, 2015 · Javascript now has a specific built in object called Map, you can call as follows : var myMap = new Map() You can update it with .set : myMap.set("key0","value") This has the advantage of methods you can use to handle look ups, like the boolean …
javascript - Create object inside map function? - Stack Overflow
WEBApr 13, 2021 · You can try the following way: var arr = [. {id: 1, name: "values 1" } , {id: 1, name: "values 2" } ]; arr = arr.map(({name}) => ({'acc' : name})); console.log(arr); answered Apr 13, 2021 at 14:04. Mamun.
javascript - How to copy a Map into another Map ... - Stack Overflow
WEBIf you need to make a deep copy of a Map you can use the following: new Map(JSON.parse(JSON.stringify(Array.from(source)))); Where source is the original Map object. Note this may not be suitable for all use cases where the Map values are not …
How to create a simple map using JavaScript/JQuery
WEBNov 22, 2010 · How can you create the JavaScript/JQuery equivalent of this Java code: Map map = new HashMap(); //Doesn't not have to be a hash map, any key/value map is fine. map.put(myKey1, myObj1); map.put(myKey2, myObj2); //Repeat n times. function …
using .map () instead of .forEach for creating an object
WEBDec 18, 2020 · There is a need to create an object from this data using the id as the key and having the min and max as the value, like so: The current approach for creating this object is the following - let object = {}; data.forEach(o => { object[o.id] = { min: …
How to map key/value pairs of a "map" in JavaScript?
WEBFeb 12, 2019 · If you have a Map object, use Array.from(map) to get the entries of the map and use the second parameter of Array.from to go over each entry and create the desired string. For using this in TypeScript, you can cast it as any. (Object.entries(map) as …
javascript - How to iterate a Map () object? - Stack Overflow
WEBOct 27, 2023 · Here's a simple example of using the default iterator (which is also the one you get from entries): const map = new Map(); map.set(1, "one"); // Could also include these when calling. map.set(2, "two"); // the constructor but I wanted to. map.set(3, …
how to build a javascript object using an array and the map …
WEBJun 13, 2012 · map not only returns arrays, but also only returns arrays of the same length as the original. It's meant for transforming one array's values 1:1 into a new array. reduce is meant to "reduce an array to a single value". Hence its use here.
javascript - Map keys and create a new object - Stack Overflow
WEBJun 13, 2018 · How to set a parameter in a Object.keys().map() function as a key in a new object?
Is there a `.map` like function for objects? To create a new object ...
WEBWith an array we can use the .map method to create a new map with the same array structure (ie. the same number of elements). eg. const array = [2, 4, 6]; const newArray = array.map(v => v *2); //[4, 8, 12];
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