Search Results for: javascript object

This article will show you how to check if a value is in an array in the JavaScript programming language. Code examples to check whether an array includes a value are provided. Arrays in JavaScript Arrays are a type of variable that hold an ordered list of values. Each value in an array has a position within the array, called the index. The index can be used to access each value in the array. Indexes are integer values, which start counting from 0 (zero) for the first … Read more

One of the most common things you will want to do with a variable is to print a string representation of it. That’s what the toString() method is for. This article will explain when and how you can use it. Converting to Strings Data is displayed on your computer screen is most frequently displayed as text strings, regardless of how the data was stored. Numbers, arrays, boolean values, and objects, all have string representations that allow them to be viewed as text on screen, either for the … Read more

This article will show you how a JavaScript while loop is constructed, and what it us used for, with code examples. While loops are one of the simplest kinds of loops, and appear in most programming languages. A while loop runs a block of code repeatedly, until a condition is met. When the while condition is met, the loop stops. It’s important to get comfortable with using loops – and understanding how they work – as they form the backbone of just about every game and application you might write. Make sure you’re familiar … Read more

You’ve searched for ‘JavaScript Print’ – so you’re probably trying to output data to the console, to the webpage or to a printer. Here’s how to do all three. Printing to the Console with console.log() The JavaScript console.log() method prints data to the JavaScript console (visible in your browsers web inspector). Any type of data can be logged to the console, including strings, numbers, arrays, and objects, and either the contents of, or a text representation of, the value will be displayed. console.log() is frequently used for debugging – developers use it to view … Read more

This article will show you how a JavaScript do while loop is constructed, and what it us used for, with code examples. do while loops are one of the simplest kinds of loops, and appear in most programming languages. A do while loop runs a block of code repeatedly, until a condition is met. When the do while condition is met, the loop stops. It’s important to get familiar with using loops – and understanding how loops work – as they form the backbone of just about every game and application you might … Read more

This brief tutorial will show you two ways to convert JavaScript arrays to strings using the toString() and join() methods. What Are Arrays? An array is a data structure which holds multiple values. It’s like a numbered list – each item in the array has a value and a position (called the index). The indexes start counting at position 0, so the first item in an array is at index 0, the second at index 1 and so on. Converting Arrays to Strings in JavaScript There are many reasons you may wish … Read more

This short tutorial will show you how to use the JavaScript Array.shift() method to remove items from an array, and provide some code examples. JavaScript Arrays An array is a variable type which can hold zero or more values within it. Each value in an array has a position, called the index – which is an integer value representing the items position in it’s order of appearance. Indexes start counting at position 0 – so the first item in an array is at index 0, the second item at index 1, and so on. JavaScript … Read more

This quick tutorial will show you how to reverse a string in JavaScript. Strings are Array-Like Strings in JavaScript are considered array-like. A string is an ordered series of characters, so it can be considered as an array of characters. This makes it easy to convert a string to an array. We can then use any one of the methods available for reversing the array to reverse the string. This means you can use any of the methods we’ve previously outlined on reversing arrays on strings. … Read more

This tutorial will show you how to sort arrays in the JavaScript programming language with the array sort() method and provide some code examples. What is an Array in JavaScript? An array is a type of JavaScript variable that can hold a series of variables, references to variables, or values. It’s like a list of items. Each item or element in the array has a value and a position. The position is the order the element appears in the array and is called the index. Indexes are zero-indexed – meaning … Read more

This article will explain the JavaScript break and continue statements and how they are used to exit and skip iterations in loops. JavaScript Loops In programming, a loop iterates through a series of values, performing an action on each value it encounters. Arrays can be looped through using the forEach method, and the for statement can be used to loop through a set of values generated by a JavaScript expression. You may encounter situations where you want to prematurely exit a loop, or skip processing certain values in the loop. This is what … Read more