4skinSkywalker

// This source code is subject to the terms of the Mozilla Public License 2.0 at https://mozilla.org/MPL/2.0/
// © Fr3d0C0rl30n3

//@version=4
study("Fr3d0's Volume Profile Visible Range", "VPVR", overlay=true, max_boxes_count=500)

DEFAULT_COLOR = color.new(color.gray, 0)
BORDER_COLOR = color.new(color.black, 80)
BUY_COLOR = color.new(color.green, 0)
SELL_COLOR = color.new(color.red, 0)

4skinSkywalker

// This function is just an arbitrary delay to be used with async/await pattern
export function delay(ms) {
    return new Promise(res =>
        setTimeout(() =>
        res(1)
        , ms)
        );
    }
    
/* SmartInterval creates an interval that has the following features:

4skinSkywalker

/* The objective of the two following snippets is to
 * handle async events with an imperative style of
 * coding
 * 
 * I also want the API to be compatible with that of
 * observables, so that I can drop-in replace them
 * That means it should also work with "| async"
 * in Angular
 * 
 * By convention use $ as suffix to mark the varname

4skinSkywalker

class Stack {
    constructor() {
        this.array = []
    }

    push(value) {
        this.array.push(value)
    }

    pop() {

4skinSkywalker

class RandomizedQueue {
    constructor(array = []) {
        this.array = array
        this.size = 0
    }

    isEmpty() {
        return this.size < 1
    }

4skinSkywalker

class Node {
    constructor() {
        this.value = null
        this.prev = null
        this.next = null
    }
}

class Deque {
    constructor() {

4skinSkywalker

Object.prototype[Symbol.iterator] = function* () {
    for (const key of Object.keys(this)) {
        yield this[key]
    }
}

var obj = {
    'mark': 32,
    'alex': 19,
    'mary': 25

4skinSkywalker

class Stack {
    constructor() {
        this.array = []
    }

    push(value) {
        this.array.push(value)
    }

    pop() {

4skinSkywalker

function getDigit(n, i) {
    n = Math.abs(n)
    return (n / 10 ** i | 0) % 10
}

function countDigit(n) {
    if (n === 0) {
        return 1
    }
    n = Math.abs(n)

4skinSkywalker

function pivotHelper(array, start = 0, end = array.length) {
    let pivotValue = array[start]
    let pivotIndex = start
    for (let i = start + 1; i < end; i++) {
        if (pivotValue >= array[i]) {
            pivotIndex++
            [array[pivotIndex], array[i]] = [array[i], array[pivotIndex]]
        }
    }