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'use strict'
/// Circular double-linked list
class Node {
constructor () {
this.key = null
this.val = null
this.prev = this
this.next = this
}
@rkatic
rkatic / -resourceCache.js
Last active March 9, 2023 17:12
Simple single resource cache.
const isNotExpired = x => x && x.exp >= Date.now()
export function resourceCache (get, isValid = isNotExpired, initialData = undefined) {
let data = initialData
let pending = null
return async () => {
if (pending) return pending
if (!isValid(data)) {
import { useEffect, useLayoutEffect, useRef, useState } from 'react'
function shallowEqualArrays(a, b) {
if (a.length !== b.length) {
return false
}
for (let i = 0; i < a.length; ++i) {
if (a[i] !== b[i]) {
return false
@rkatic
rkatic / limited.js
Last active October 16, 2023 13:26
Elegant implementation of concurrency/speed limiter.
/** @param {number} n */
function semaphore (n) {
const resolvers = []
const pushToResolvers = resolve => { resolvers.push(resolve) }
/** @type {() => (Promise<void> | void)} */
const acquire = () => {
if (--n < 0) {
const HR = `
# sintaksa: regularni_izraz [dio_za_dodat]
# prva grupa u regularnom izrazu je i dio koji se brise
PFX (je|ni|ne|ho|naj|pra|is)
PFX (ne) i
SFX (i|mo|te|u) am