Borys space11

const precision = '4';
const re = new RegExp('^[0-9]*\.[0-9]{' + precision + '}$');


//returns true
re.test('10.50')

//returns false
re.test('-120')

Working with nested arrays in JavaScript / TS.

Map array of arrays to single array - flat. [].concat(...this.array1.map(ap => ap.subArray))

	// Source: https://github.com/typeorm/typeorm/issues/508

	// Note: when we are referencing post we want to via non primary key, but by `postId`
	@OneToOne(() => PostInfo, (entity) => entity.postId)
	@JoinColumn({ name: 'postId', referencedColumnName: 'postId' })
	post: PostInfo;

	<ngx-slick-carousel class="carousel" [config]="carouselConfig" #slickCarousel>
	<div ngxSlickItem *ngFor="let item of vm.item; let i = index"
	class="py-5 text-center cursor-pointer">
	{{ item.content }}
	</div>
	</label>
	</ngx-slick-carousel>

	<!DOCTYPE html>
	<html>
	<head>
	<title>Title of the document</title>
	</head>
	<body>
	<input type="number" name="test_name" min="0" oninput="validity.valid\|\|(value='');">
	</body>
	</html>

	import { Renderer2, RendererFactory2 } from '@angular/core';

	@Injectable()
	class Service {
	private renderer: Renderer2;

	constructor(rendererFactory: RendererFactory2) {
	this.renderer = rendererFactory.createRenderer(null, null);
	}
	}

	import {
	Directive,
	ElementRef,
	EventEmitter,
	OnDestroy,
	Output
	} from '@angular/core';
	import ResizeObserver from 'resize-observer-polyfill';

	const entriesMap = new WeakMap();

	enum Color {
	Red,
	Green,
	Blue
	}

	function getColorName(c: Color): string {
	switch (c) {
	case Color.Red:
	return "red";

	import { FormGroup, ValidationErrors, ValidatorFn } from '@angular/forms';

	/**
	* Validates that at least one of the form controls is valid against `validator` function passed as the parameter.
	* @param validator Validation function, in example `Validators.required`.
	* @param controls Controls names.
	* @returns ValidationErrors or null if at least control is valid.
	*
	* @example
	* ```JS

	/*
	credit to: https://stackoverflow.com/questions/46040077/how-to-implement-server-side-pagination-server-side-sorting-with-ngx-datatable
	The best way to handle both server-side pagination AND server-side sorting consist of:
	- having a page object which holds all the pagination and sorting information
	(like the order column, order direction, page number, page size, ...) which will be bound to the table
	- having a single function reloadTable() which calls the API to get the data using the data stored in the page object
	as parameters, automaticaly re-rendering the table
	- having a pageCallback which only updates the data contained in page relative to the pagination and then calls reloadTable()
	- having a sortCallback which only updates the data contained in page relative to the sorting and then calls reloadTable()
	*/