[Solved] How can I sum object values by array data using ES standard? [closed]

A reduce and forEach to group by tag and then taking the values for each tag var a= [ { “cost”: 500, “revenue”: 800, “tag”: [ “new”, “equipment”, “wholesale” ] }, { “cost”: 300, “revenue”: 600, “tag”: [ “old”, “equipment” ] }, { “cost”: 800, “revenue”: 850, “tag”: [ “wholesale” ] } ] let x … Read more

[Solved] Hide and Show Div with button [duplicate]

You can use HTMLelement.addEventListener to handle button click event and hide or show the div appropriately using the element.style.display property, the code below demonstrates how it works const divE = document.getElementById(‘more’); const btn = document.getElementById(‘show’); handler = () => { if (divE.style.display != ‘none’) { // if the element is not hidden, hide the element … Read more

[Solved] Combine Array Of Strings With String

const loginUser = “[email protected]” const old = [ { “toAddresses”: [“[email protected]”, “[email protected]”], }, { “fromAddress”: “[email protected]”, “toAddresses”: [“[email protected]”, “[email protected]”], } ]; let last = old[old.length – 1]; let combined = new Set([last.fromAddress, …last.toAddresses]); combined.delete(loginUser); let newResponse = Array.from(combined); console.log({newResponse}); solved Combine Array Of Strings With String

[Solved] Javascript ECMA6 basic , variable is not defined in ajax

So for anyone else coming here this is the working code. class ep_List { constructor() { this.urlForAjax =”; this.dataList=[]; this.dataJson=”; this.dataParams={}; } getData(method,params,url) { this.urlForAjax = url; this.dataParams=params; if(method==’get’) this.callGetAjax(); else this.callPostAjax(); } callPostAjax() { $.post(this.urlForAjax,this.dataParams,this.setList.bind(this)); } callGetAjax() { $.get(this.urlForAjax,this.setList.bind(this)); } setList(res) { this.dataList =res; console.log({dataList:this.dataList}); } } class gasFilter extends ep_List { displayList() { … Read more

[Solved] operator ‘===’ cannot be applied to types ‘false’ and ‘true’

Typescript is basically throwing an error there because it’s bad code. true will never ever equal false. Typescript knows this, and tells you to fix your code. Since these are constant values, they’re considered to be of the types true and false. The error message might be slightly confusing, but it’s correct, while giving a … Read more

[Solved] Need to implement an algorithm to obtain the average value of the fields of the graph structure( graph tree)

You could create recursive function with for…in loop and first calculate total sum and total number of nodes and then use those 2 values to calculate average. var graph_structure = {“val”:74,”child”:[{“val”:17,”child”:[{“val”:34,”child”:[{“val”:34,”child”:[{“val”:65,”child”:[{“val”:28,”child”:[{“val”:85},{“val”:30,”child”:[{“val”:68},{“val”:10,”child”:[{“val”:100,”child”:[{“val”:21,”child”:[{“val”:21},{“val”:64}]},{“val”:86}]}]}]}]}]},{“val”:22,”child”:[{“val”:17,”child”:[{“val”:65}]}]}]},{“val”:53,”child”:[{“val”:3,”child”:[{“val”:98,”child”:[{“val”:90,”child”:[{“val”:76,”child”:[{“val”:87,”child”:[{“val”:52,”child”:[{“val”:56}]}]},{“val”:47},{“val”:40,”child”:[{“val”:80,”child”:[{“val”:34}]},{“val”:23,”child”:[{“val”:47},{“val”:92}]},{“val”:98,”child”:[{“val”:89},{“val”:16},{“val”:10}]}]}]}]},{“val”:35,”child”:[{“val”:89,”child”:[{“val”:76,”child”:[{“val”:50,”child”:[{“val”:51},{“val”:90}]},{“val”:69,”child”:[{“val”:93},{“val”:98},{“val”:62}]}]}]}]}]}]}]}]}]},{“val”:98,”child”:[{“val”:85},{“val”:85,”child”:[{“val”:58,”child”:[{“val”:81,”child”:[{“val”:36,”child”:[{“val”:45,”child”:[{“val”:96,”child”:[{“val”:15,”child”:[{“val”:11,”child”:[{“val”:96}]}]},{“val”:48,”child”:[{“val”:4,”child”:[{“val”:74},{“val”:1}]},{“val”:7}]}]},{“val”:84,”child”:[{“val”:9},{“val”:81,”child”:[{“val”:10,”child”:[{“val”:67}]}]}]}]},{“val”:85,”child”:[{“val”:53},{“val”:7,”child”:[{“val”:47,”child”:[{“val”:74,”child”:[{“val”:30},{“val”:7},{“val”:12}]},{“val”:22}]},{“val”:56,”child”:[{“val”:51,”child”:[{“val”:45}]},{“val”:54,”child”:[{“val”:20},{“val”:62}]}]}]}]}]}]}]},{“val”:62,”child”:[{“val”:36,”child”:[{“val”:39,”child”:[{“val”:20}]},{“val”:10,”child”:[{“val”:91,”child”:[{“val”:81,”child”:[{“val”:59,”child”:[{“val”:19,”child”:[{“val”:59},{“val”:16}]},{“val”:35,”child”:[{“val”:30}]},{“val”:6,”child”:[{“val”:27}]}]},{“val”:89,”child”:[{“val”:60,”child”:[{“val”:59}]}]}]}]}]}]}]}]}]},{“val”:8,”child”:[{“val”:56,”child”:[{“val”:55,”child”:[{“val”:41,”child”:[{“val”:17,”child”:[{“val”:15,”child”:[{“val”:40,”child”:[{“val”:55,”child”:[{“val”:50},{“val”:99,”child”:[{“val”:86},{“val”:90}]}]}]},{“val”:85,”child”:[{“val”:36,”child”:[{“val”:39,”child”:[{“val”:45}]}]}]},{“val”:78,”child”:[{“val”:24,”child”:[{“val”:93,”child”:[{“val”:8}]},{“val”:26,”child”:[{“val”:5}]}]},{“val”:36}]}]},{“val”:13}]}]},{“val”:10,”child”:[{“val”:0,”child”:[{“val”:77,”child”:[{“val”:46,”child”:[{“val”:72,”child”:[{“val”:17,”child”:[{“val”:10},{“val”:67}]},{“val”:48},{“val”:60}]},{“val”:98,”child”:[{“val”:12,”child”:[{“val”:61},{“val”:27}]}]}]}]}]}]}]}]}]}]} function calc(data) { return (function repeat(data, res) { for(let i in data) { if(data.val) { res.nodes++; res.total += data.val if(!res.min) res.min = data else … Read more

[Solved] How to retrieve object property values with JavaScript?

You can use the map() method along with the ES6 fat arrow function expression to retrieve the values in one line like this: users.map(x => x.mobile); Check the Code Snippet below for a practical example of the ES6 approach above: var users = [{mobile:’88005895##’},{mobile:’78408584##’},{mobile:’88008335##’}]; var mob = users.map(x => x.mobile); console.log(mob); Or if you prefer … Read more

[Solved] Javascript Object to ES6 Classes

Simply use the class statement to declare your class, then add its properties in the constructor and its (static) methods in the class’ body. class Start { constructor() { this.config = { a: 1 }; this.core = { engine_part1: () => (console.log(‘engine_part1’)), engine_part2: () => (console.log(‘engine_part2’)), } } init() { console.log(‘init’); } } const start … Read more

[Solved] In React with ES6 , constructor(prop) doesn’t raise error. Why?

A constructor is a javascript function. The arguments that it takes are positional arguments. That means the values are determined by their position in the argument list and not by their name. Javascript doesn’t have named parameters. The first parameter of the constructor of React.Component is containing the props that where passed to it on … Read more

[Solved] How to square integers inside an array?

Just map over the array and do Math.pow(int,power) but multiplication is faster so do value * value in the .map function const realNumberArray = [4, 5.6, -9.8, 3.14, 42, 6, 8.34, -2]; // your array const squares = realNumberArray.filter(x => x > 0 && Number.isInteger(x)); // your filter function const squared = squares.map(val => val*val) … Read more