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In Typescript what does <T> mean?
(4 answers)
What does enclosing a class in angle brackets "<>" mean in TypeScript?
(2 answers)
Closed last month.
In this code below, what does Promise<LetterService[]> mean?
Is the LetterService[] saying create an array with LetterService objects inside it?
What are the <> indicating here?
export default interface LetterService {
GetLetters(): Promise<LetterService[]> }
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What is the purpose of bivarianceHack in TypeScript types?
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Difference between Variance, Covariance, Contravariance and Bivariance in TypeScript
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Closed 6 months ago.
I've recently been doing more exploration in advance TS types and was going through react type declarations when I came Accross this
type RefCallback<T> = { bivarianceHack(instance: T | null): void }["bivarianceHack"];
can someone explain what ["bivarianceHack"] means and what it does? Not the string itself, but wondering why an array is declared after like type T = {}[] <-- []
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Explain the encapsulated anonymous function syntax
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Why are parentheses required around JavaScript IIFE? [duplicate]
(3 answers)
Closed 2 years ago.
Why if I have
function(){...}()
does not work while when I put inside brackets like
(function(){...}())
it works?
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Should I be using object literals or constructor functions?
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Javascript Object : Literal Vs Constructor [duplicate]
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Object vs Class vs Function
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What is a difference between an object literal and a class with values in constructor in javascript?
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Closed 3 years ago.
I am currently finding it hard to figure out the difference between an object literal and a class.
Here's a link!
This might be helpful for you.
Content of the link:
The most significant difference I can see between creating classes and
literally notated objects is that the latter are entire objects,
whereas classes are not objects, but blueprints from which objects are
created.
This question already has answers here:
What does this symbol mean in JavaScript?
(1 answer)
What does curly brackets in the `var { ... } = ...` statements do?
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What do {curly braces} around javascript variable name mean [duplicate]
(1 answer)
Closed 4 years ago.
I was reading some JavaScript code and saw a line of code similar to this.
const {name, password, email} = user;
I tried searching around but could not figure out what this syntax is called so I am not able find the documentation. Is this a new JavaScript syntax? What is it called? What does it do exactly?
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How to get objects value if its name contains dots?
(4 answers)
How can I access object properties containing special characters?
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Closed 9 years ago.
I have a property with name 'pp.phaseName' in an object 'Config'
Whenever I try to access it like Config.pp.phaseName, it's throwing error.
I've tried using Config.(pp.phaseName), Config."pp.phaseName" etc. but none was working.
Please help me on how to do this.
You have to use the square bracket notation.
Config["pp.phaseName"]