Lara Baldwin

Lara Baldwin


14 Must Know JavaScript Array Methods in 2020

Alright, I admit it ~ toString() probably isn’t a must know, but the rest – well, they’re either very useful or forEach.

I’ll talk trash on forEach all day, every day – but at the end of the day it’s still highly used and thus made the list.

The rest are the js array methods I tend to use most – reduce being far and away my favorite.

- filter
- map
- some
- every
- find
- forEach
- reduce
- includes
- indexOf
- lastIndexOf
- sort
- slice
- join
- toString

#javascript #web-development #developer

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14 Must Know JavaScript Array Methods in 2020
Brain  Crist

Brain Crist


Citrix Bugs Allow Unauthenticated Code Injection, Data Theft

Multiple vulnerabilities in the Citrix Application Delivery Controller (ADC) and Gateway would allow code injection, information disclosure and denial of service, the networking vendor announced Tuesday. Four of the bugs are exploitable by an unauthenticated, remote attacker.

The Citrix products (formerly known as NetScaler ADC and Gateway) are used for application-aware traffic management and secure remote access, respectively, and are installed in at least 80,000 companies in 158 countries, according to a December assessment from Positive Technologies.

Other flaws announced Tuesday also affect Citrix SD-WAN WANOP appliances, models 4000-WO, 4100-WO, 5000-WO and 5100-WO.

Attacks on the management interface of the products could result in system compromise by an unauthenticated user on the management network; or system compromise through cross-site scripting (XSS). Attackers could also create a download link for the device which, if downloaded and then executed by an unauthenticated user on the management network, could result in the compromise of a local computer.

“Customers who have configured their systems in accordance with Citrix recommendations [i.e., to have this interface separated from the network and protected by a firewall] have significantly reduced their risk from attacks to the management interface,” according to the vendor.

Threat actors could also mount attacks on Virtual IPs (VIPs). VIPs, among other things, are used to provide users with a unique IP address for communicating with network resources for applications that do not allow multiple connections or users from the same IP address.

The VIP attacks include denial of service against either the Gateway or Authentication virtual servers by an unauthenticated user; or remote port scanning of the internal network by an authenticated Citrix Gateway user.

“Attackers can only discern whether a TLS connection is possible with the port and cannot communicate further with the end devices,” according to the critical Citrix advisory. “Customers who have not enabled either the Gateway or Authentication virtual servers are not at risk from attacks that are applicable to those servers. Other virtual servers e.g. load balancing and content switching virtual servers are not affected by these issues.”

A final vulnerability has been found in Citrix Gateway Plug-in for Linux that would allow a local logged-on user of a Linux system with that plug-in installed to elevate their privileges to an administrator account on that computer, the company said.

#vulnerabilities #adc #citrix #code injection #critical advisory #cve-2020-8187 #cve-2020-8190 #cve-2020-8191 #cve-2020-8193 #cve-2020-8194 #cve-2020-8195 #cve-2020-8196 #cve-2020-8197 #cve-2020-8198 #cve-2020-8199 #denial of service #gateway #information disclosure #patches #security advisory #security bugs

Rose Lancy

Rose Lancy


9 Must Know JavaScript Array Methods

Arrays are one of the most common things that you’re going to use as a programmer. So, I’m going to explain nine JavaScript array methods that are going to make your life so much easier and more enjoyable.

To get started I just have an array of items, that we’re going to use for all these different array methods. Without wasting much time, let’s dive deep in to the pool of arrays (wink…)

const arrayItems = [
  {name: 'cheese cake', price: 25},
  {name: 'ham burger', price: 30},
  {name: 'cheesy tacos', price: 20},
  {name: 'beef burito', price: 18},
  {name: 'maxican chille rice', price: 15},
  {name: 'hot chocolate', price: 12},
  {name: 'apple frudge', price: 28},
  {name: 'chicken lassagna', price: 35},

filter() method

So let’s assume that we want to get all the items in this list that are less than or equal to 26 dollars of price. All we need to use is the filter method to filter out everything that’s under 26 dollars. So, let’s just say that, we have a variable which is going to be filteredItems. The filter method just takes a single function which is going to have one parameter.

const filteredItems = arrayItems.filter((item) => {
  return item.price <= 26;

#web-development #javascript #arrays #array-methods

Shahab Uddin

Shahab Uddin


JavaScript array() methods, every JavaScript developer must know

1. push() method allows us to add one or more item at the end of an array.

let numbers = [1,2,3,4,5];
numbers.push(6); // Adding 6 at the end of the array
//Output: [1,2,3,4,5,6]

2. pop() method allows us to remove the item from the end of an array.

let numbers = [1,2,3,4,5];
numbers.pop(); // Removing last item from the array
//Output: [1,2,3,4]

3. shift() method allow us to remove an item from the front of the array

let numbers = [1,2,3,4,5];
numbers.shift(); // Removing the first item of the array
//Output: [2,3,4,5]

4. unshift() method allow us to add new items at the front of the array

let numbers = [1,2,3,4,5];
numbers.unshift(0); // Adding ‘0’ at the beginning of the array
//Output: [0,1,2,3,4,5]

5. forEach() method will help you to iterate over array’s items.

let numbers = [1, 2, 3, 4, 5];
numbers.forEach(item => {
	// Let's itrate the given array items and add 1 to each item.
    console.log(item + 1); 

6. includes() method return booleans to check either your array length includes the specific item passed in the method or not.

let numbers = [1, 2, 3, 4, 5];
//Output: false
//Output: true

7. filter() method creates a new array with a subset of elements of the original array.

Lets create an array object ‘names’ to apply filter()

let names = [
    {name: 'Shahab', age: 35},
    {name: 'Ibaad', age: 10},
    {name: 'Ayaan', age: 30},
    {name: 'Hamad', age: 20},
    {name: 'Pari', age: 22}
// Filtering names data by age > 10;
let filterd_items = names.filter(item => item.age > 10);

// Output:
0: {name: "Shahab", age: 35}
1: {name: "Ayaan", age: 30}
2: {name: "Hamad", age: 20}
3: {name: "Pari", age: 22}

8. sort() method allows us to sort data and return the elements after changing the positions of the elements in the original array.
The sort() method sorts the array elements in ascending order by default.

let numbers = [1, 5, 2, 0, 40, 3, 10 ];
//Output:  [0, 1, 10, 2, 3, 40, 5]

Look at the above output given by sort() method and the output is not as per expected,
To solve this issue, we need to pass a comparison function to the sort() method.


numbers.sort((a,b) => {
    if(a > b) return 1;
    if(a < b) return -1;
    return 0;
//Output: [0, 1, 2, 3, 5, 10, 40]

9. splice() method allows us to delete items in an array, to get result we have to pass two arguments to the splice() method.



let numbers = [1,2,3,4,5];
let deletedNumbs = numbers.splice(0,2);

//The original numbers array now contains only 3 items. i.e: 3,4,5
console.log(numbers); //  [3,4,5]

The new deletedNumbs array contains the deleted items from the original array
console.log(deletedNumbs); // [1, 2]

10. map() method take an array, manipulate its elements, and return a new array by calling the provided function in every element.


let numbers = [1,2,3,4,5];
Let's multiply each item and get the output doubled
let output = => item * 2)
//Output: [2, 4, 6, 8, 10]

#javascript #array #methods #arrowfunction

Terry  Tremblay

Terry Tremblay


Fill and Filter in Array in JavaScript

By the word Array methods, I mean the inbuilt array functions, which might be helpful for us in so many ways. So why not just explore and make use of them, to boost our productivity.

Let’s see them together one by one with some amazing examples.


The _fill()_ method changes all elements in an array to a static value, from a start index (default _0_) to an end index (default _array.length_). It returns the modified array.

In simple words, it’s gonna fill the elements of the array with whatever sets of params, you pass in it. Mostly we pass three params, each param stands with some meaning. The first param value: what value you want to fill, second value: start range of index(inclusive), and third value: end range of index(exclusive). Imagine you are going to apply this method on some date, so that how its gonna look like eg: array.fill(‘Some date’, start date, end date).

NOTE: Start range is inclusive and end range is exclusive.

Let’s understand this in the below example-

//declare array
var testArray = [2,4,6,8,10,12,14];


When you run this code, you gonna see all the elements of testArray will be replaced by 'A' like [“A”,"A","A","A","A","A","A"].

#javascript-tips #array-methods #javascript-development #javascript #arrays

Lowa Alice

Lowa Alice


JavaScript Arrays Tutorial. DO NOT MISS!!!

Learn JavaScript Arrays

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#arrays #javascript #javascript arrays #javascript arrays tutorial