Search Results for: javascript string

This guide aims to succinctly show you how multidimensional arrays can be created and used in the JavaScript programming language. What are Arrays? Arrays are a key component in any app kind of app you may wish to build – arrays allow you to store an ordered list of variables or values of any length in a single variable – ready to be iterated over, displayed, or otherwise processed. For example, an array could contain a list of contacts for an instant messaging application, or … Read more

This article will show you the ways to convert an object to an array in JavaScript – quickly and easily. There are many ways to convert objects to arrays, but these (should) be the most straightforward methods. Converting Object to Array in JavaScript – Values Only If you only need the values from the object, the Object.values() method will extract them into an array: var myObject = { colour: ‘blue’, number: 43, name: ‘Fred’, enabled: true }; var values = Object.values(myObject); console.log(values); The above will return an array with … Read more

This article will explain what absolute values are, how they are used, and how the JavaScript Math.abs() function can be used to calculate the absolute value of a number. What is the ‘Absolute Value’ of a Number? The absolute value of a number is that number’s value – without any regard to its sign. A numbers sign determines whether it is positive or negative – it’s the – symbol before a negative number. So, the absolute value of a number is never negative. Consider the absolute value of a number that numbers distance from 0. The absolute value of … Read more

This article will explain floating-point numbers and how to convert values to floating-point numbers using parseFloat() in JavaScript. Looking to convert to an integer value instead – use parseInt()! What is a Floating Point Number? In programming, a floating-point number (commonly just called a float) is a number with any number of characters before or after a decimal point. A floating-point number might look something like this: 14.392 A floating-point number or float is also a type of variable. A variable’s type determines what kind of values it can store and what can be done with the variable … Read more

There are several ways to declare an array in JavaScript. This article will show you which is the best. What is an Array? An array is a type of variable that holds an ordered list of values. Each value has a position in 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 item in the array. The Literal Constructor – Declaring an Array using Square Brackets (The Best … Read more

This article will show you a few ways, both easy and complex, to randomize/shuffle an array in JavaScript. The Quick and Dirty Way to Randomize an Array If you aren’t too concerned about the probabilities involved, this code is a quick way to randomize the contents of an array: // Function to return a shuffled copy of a given array function shuffle(array) { var shuffled = […array]; // Make a copy of the array to be shuffled so that the original is not altered by … Read more

This short article will show you how to reverse an array in the JavaScript programming language. What is an Array? An array is a type of variable that holds an ordered list of values. Each value has a position in the array, called the index – and can be accessed by using that index. As an array is ordered, the position matters. Values within arrays will be processed by loops and other data structures in order – so being able to reverse that order is beneficial. Reversing an … Read more

Here’s a short article that explains arrays and how to check if a JavaScript variable is an array using the Array.isArray() method. Want to check out whether an array contains a value? Find out how here. What is An Array? An array is a type of JavaScript variable that can hold other variables, or references to other variables, in a list at a certain position. Declaring an Array in JavaScript An array is declared in JavaScript the same way as any other variable – by assigning the value … Read more