How to enforce integer sizes in JS? (TypeScript?)

How to enforce integer sizes in JS? (TypeScript?)

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How to enforce integer sizes in JS? (TypeScript?)
Tag : javascript , By : Imran
Date : November 24 2020, 05:44 AM

like below fixes the issue For typical machine bit-sizes, you could use typed arrays.
For example,
const typedArray1 = new Int8Array(8);
typedArray1[0] = 32;

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How to enforce a constraint violation when inserting non-integer number to integer column?

Tag : sql , By : Marie Ramos
Date : March 29 2020, 07:55 AM
I wish this helpful for you This might be in fact impossible. Let's study the fine manual.
How an integer is specified:

Typescript enforce partial interface

Tag : typescript , By : Diego
Date : March 29 2020, 07:55 AM
This might help you You have no way of setting a pattern for property names.
What you can do is:
interface IData {
    prop1: string;
    prop2: number;
    [name: string]: string | number;
let data = {
    prop1: "abc",
    prop2:  123,
    COL_A12: "mydata",
    COL_A13: "myotherdata",
} as IData;

console.log(data.prop1); // ok
console.log(data.COL_A12); // error
console.log(data["COL_A12"]); // ok
let a = data["COL_A12"]; // typeof a is 'string | number'
let b = data["COL_A12"] as string; // typeof a is 'string'
class Data {
    private raw: IData;

    constructor(data: IData) {
        this.raw = data;

    public get prop1(): string {
        return this.raw.prop1;

    public get prop2(): number {
        return this.raw.prop2;

    public col(num: number): string {
        return this.raw[`COL_A${ num }`] as string;

Enforce type in typescript by using interfaces

Tag : angular , By : pad
Date : March 29 2020, 07:55 AM
Hope this helps This code says component is of type ModalContent which means it can hold an instance of ModalContent.
private component: ModalContent;
this.component = MyCustomModalComponent;
this.component = new MyCustomModalComponent();
private component: Type<ModalContent>

how to enforce function type in typescript

Tag : typescript , By : Saul
Date : March 29 2020, 07:55 AM
seems to work fine Good question!
I think this is a deliberate design choice typescript is making here.
type ClickHandler = (evt: MouseEvent) => any

// Valid uses:
element.onClick = () => doSomething()
element.onClick = (evt) => doSomething(evt.target.value)
const fn: ClickHandler = () => {}
fn() // typescript error

How does Typescript 2 enforce non-nullable types?

Tag : javascript , By : terrestrial
Date : March 29 2020, 07:55 AM
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