javascript-objects

问题 I have a scenario in nodeJS. I have an object which contains number of elements and array var Obj = { count: 3, items: [{ "organizationCode": "FP1", "organizationName": "FTE Process Org" }, { "organizationCode": "T11", "organizationName": "FTE Discrete Org" }, { "organizationCode": "M1", "organizationName": "Seattle Manufacturing" } ] }; The scenario is like this. I have to filter result based on criteria. I have print output if either organizationCode or organizationName starts with

问题 Plugin code: ( function() { this.Modal = function modal( selector, options ) { // If there's a passed element is already initialized return its instance if ( !modal.instances ) { modal.instances = {}; } if ( modal.instances[ selector ] ) { return modal.instances[ selector ]; } modal.instances[ selector ] = this; // Plugin options var defaults = { open: false }; this.options = extendDefaults( defaults, options ); selector.style.setProperty( 'background-color', 'red' ); } function

问题 Plugin code: ( function() { this.Modal = function modal( selector, options ) { // If there's a passed element is already initialized return its instance if ( !modal.instances ) { modal.instances = {}; } if ( modal.instances[ selector ] ) { return modal.instances[ selector ]; } modal.instances[ selector ] = this; // Plugin options var defaults = { open: false }; this.options = extendDefaults( defaults, options ); selector.style.setProperty( 'background-color', 'red' ); } function

问题 I have not worked too much on javascript. And, I need to parse a JSON string. So, I want to know what exactly JSON.parse does. For example : If I assign a json string to a variable like this, var ab = {"name":"abcd", "details":{"address":"pqrst", "Phone":1234567890}}; Now when I print 'ab', I get an object. Similarly when I do this : var pq = '{"name":"abcd", "details":{"address":"pqrst", "Phone":1234567890}}'; var rs = JSON.parse(pq); The 'rs' is the same object as 'ab'. So what is the

问题 I am working on an assignment. I have the following object form. { name: "name here", skills: [ "cash", "shares" ], subjects: [ { subName: "subject1", remark: ['remark1', 'remark2'] }, { subName: "subject2", remark: ['remark1', 'Hockey'] } ] } I want to generate a Cartesian product of the properties so that the output is an array of the following form: [ { "name": "name here", "skills": "cash", "subjects": { "subName": "subject1", “remark”: “remark2” }}, { "name": "name here", "skills": "cash

问题 I have an array of objects like var array = [{date:'01/01/2017',value1:200,value2:300,value3:400}] I am trying to get a subset of the object properties like var var newArray = [['01/01/2017',200],['01/01/2017',200],['01/01/2017',200]......] I do not want an array like this [[date:'',value2:],[date:'',value2:],[date:'',value13:]] But just directly a 2 D array from array of objects. Currently I am doing a for each on my array of objects and pushing the required properties in to an array an

问题 I've a challenge. How to recursively dive through deeply nested typescript models? And map those deep paths as an object [key: value]. where key - is the column name or an identifiable name & value is the path (depth ) traversed. what I mean by depth is this someObject.level1.level2.level3.level4... Like that. Imagine I have a couple of Typescript Interfaces (all external files). One Interface Pointing to another then the other & so On. Eg: export interface University { name: string; type:

问题 I want to create a static class using Javascript/Node JS. I used google but i can't find any usefull example. I want to create in Javascript ES6 something like this (C#): public static MyStaticClass { public static void someMethod() { //do stuff here } } For now, I have this class, but I think that this code will creates a new instance every time that it be called from "require". function MyStaticClass() { let someMethod = () => { //do some stuff } } var myInstance = new MyStaticClass();

问题 function myFunc(){ console.log(myFunc.message); } myFunc.message = "Hi John"; myFunc(); Executing the above results in - Answer: 'Hi John' How is the function myFunc have the property message on it? typeof myFunc results in "function" and console.log(myFunc) displays the function content (without the property message on it). How does the above work? Is a function in JavaScript internally an object? Note - I am aware that functions have other parameters like prototype and length on them. But I

问题 I'm trying to write a function that takes some object, for example a number, a string, a list, or a map (of key-value pairs); and returns a valid JSON representation of that input as a string. I have already set up other json encoders for simple numbers and string inputs: Input => Output a number with value 123 => 123 (string) a string with value abc => "abc" (string) But I'm having issues converting an array such as [1,"2",3] Input => Output 1,2,three array => [1,2,"three"] (string) Here is