Stacy  DuBuque

Stacy DuBuque

1605773340

Array Iterators Keys and Values - Access and iterate Array items

Learn to access array items and how to extract information out of keys, values and entries iterators.

#javascript

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Array Iterators Keys and Values - Access and iterate Array items

Java: How to Get Keys and Values from a Map

Introduction

Key-value stores are essential and often used, especially in operations that require fast and frequent lookups. They allow an object - the key - to be mapped to another object, the value. This way, the values can easily be retrieved, by looking up the key.

In Java, the most popular Map implementation is the HashMap class. Aside from key-value mapping, it’s used in code that requires frequest insertions, updates and lookups. The insert and lookup time is a constant O(1).

In this tutorial, we’ll go over how to get the Keys and Values of a map in Java.

#java #java: how to get keys and values from a map #keys #map #values #how to get keys and values from a map

Stacy  DuBuque

Stacy DuBuque

1605773340

Array Iterators Keys and Values - Access and iterate Array items

Learn to access array items and how to extract information out of keys, values and entries iterators.

#javascript

Joseph  Murray

Joseph Murray

1623911281

How to Print an Array in Java

Introduction

Printing an array is a quick way to give us visibility on the values of the contents inside. Sometimes the array values are the desired output of the program.

In this article, we’ll take a look at how to print an array in Java using four different ways.

While the “best way” depends on what your program needs to do, we begin with the simplest method for printing and then show more verbose ways to do it.

#java #array #how to print an array in java #array in java #print an array in java #print

Lia  Haley

Lia Haley

1598876400

The World Needs Web Accessibility Now More Than Ever

A background with a top view of a laptop keyboard and text that reads, the web has become less accessible.

I attended a talk last year by Mike Gifford where he said, “the web has actually become LESS accessible since 2011.”

It’s cheap and easy for anyone to create a website these days, and hardly anyone considers accessibility. And why would you? If it’s not in your daily purview, it’s not going into your list of website requirements. Heck, most people don’t even think of the end user, Disabled or not, when creating a website. Especially not when they use a “drag and drop” style website creation platform. Nothing against those, just that those platforms often don’t have accessibility built in, and it’s very difficult to make them so, even if you had the desire.

The other aspect working against website accessibility is when you say the word, ‘accessibility’ not every even has a concept of what that means. I asked a website designer recently if he makes accessible websites, and he said, “yes…we add alt-tags to all our images.” Ummmm, OK. Great. But can a screen reader read your website?

So let’s dispel some myths and dive a bit into the world of what it means to implement web accessibility.

First off, it’s important to note that the USA actually has very clear legislation regarding accessibility. It’s called the Americans With Disabilities Act, and it includes websites. US-based companies should be aware that not having a minimally accessible business website can leave you open to a law suit and fines. I’m Canadian with a Canadian registered company, so I do not actually have to worry about getting sued for not having an accessible website, but bonus, I have one anyway! I’ll explain why it’s beneficial to have an accessible website even if you are not a US-based company.

#accessibility #web-accessibility #accessibility-design #accessibility-testing #amazon web services

Javascript Array Keys Example | Array Keys In Javascript

Javascript array keys() method returns the new Array Iterator object that contains the keys for each index in an array. The array keys() method does not change the original array.

Javascript Array Keys Example

The syntax for the Javascript Array keys() method is the following.

arr.keys()

Let us take a simple example.

// app.js

let arr = ['a', 'b', 'c'];
let iteratorObj = arr.keys();

console.log(iteratorObj);

So, it has given us iteratorObj. We can get the values by iterating for…of() loop.

// app.js

let arr = ['a', 'b', 'c'];
let iterator = arr.keys();

console.log(iterator);

for (let key of iterator) {
  console.log(key);
}

#javascript #javascript array keys #js