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What is Cache?A cache is a data storage mechanism that allows users to retrieve data or files on computers quickly.Caches can be found in both hardware and software. Caching reduces data access latency by acting as an intermediary between the primary storage appliance and the receiver hardware or software device.A cache provides similar capabilities in both hardware and software. It's a type of internal memory with a tiny form factor that saves instances of the most frequently executed programs in main memory for faster access when the CPU needs them in physical or hardware form.We are all familiar with the ... Read More
We could apply String split(), Array sort() and Array join() methods to write a function that returns a passed string with letters in alphabetical order in JavaScript. A JavaScript function is a block of code that is executed when it is invoked. A string is a sequence of characters. In JavaScript, strings are represented by the type String.Input string : tutorialspoint Output string: aiilnooprstttuStepsSplit the string into an array of characters using split() method.Apply the sort() method to sort the characters in alphabetical order.Finally, we use the join() method to join the characters back into a string.The Array.sort() method sorts the ... Read More
JavaScript provides two functions for dealing with encoded strings: escape() and unescape(). The escape() function is used to encode a string, making it safe for use in a URL. The unescape() function is used to decode an encoded string.The differencesThe main difference between the two functions is that escape() encodes characters that are not ASCII, while unescape() only decodes those characters. This means that if you use escape() on a string that only contains ASCII characters, the result will be the same as the input string. However, if you use unescape() on a string that contains non-ASCII characters, the result ... Read More
In JavaScript, there are two main ways that a variable can be "undefined". The first is when you declare a variable without giving it a value. The second is when you try to access a variable that does not exist.Undefined in JavaScript When a variable is declared without a value, it is automatically given the value of "undefined". This can happen if you forget to assign a value to a variable, or if you intentionally do not assign a value (For example, if you are waiting for user input).If you try to access a variable that does not exist, you will ... Read More
JavaScript provides several ways to loop through arrays and objects. The most common way is the for loop, which is used to iterate through the elements of an array or object. However, there are other ways to loop through arrays and objects, such as the forEach() and map() methods.The forEach() MethodThe forEach() method is used to loop through each element of an array or object. The forEach() method takes a callback function as an argument. The callback function is invoked for each element of the array or object.The forEach() method is similar to the for loop, but it does not ... Read More
In JavaScript, there is a method called "Promise.all" that allows you to run an array of promises in parallel. However, sometimes you may want to run your promises in series instead. This can be useful if you want to make sure that each promise is executed one after the other, or if you need to use the result of one promise in the execution of the next promise.There are a few different ways that you can run an array of promises in series in JavaScript. In this article, we'll take a look at a few of them.Promise.prototype.then()One way to run ... Read More
In JavaScript, there are often times when we need to find the first non-null/undefined argument in a function. This can be a tricky task, but luckily there are a few methods that can help us accomplish thisUsing Array.prototype.find()One method that can be used to get the first non-null/undefined argument in JavaScript is the Array.prototype.find() method. This method returns the value of the first element in an array that passes a given test. In our case, we can use this method to find the first non-null/undefined argument by passing a test that checks if the argument is not null/undefined.ExampleIn the example ... Read More
When building web applications, there are often times when you need to dynamically generate HTML on the client-side. This can be done using JavaScript, and there are different ways to go about it. In this article, we'll show you how to return HTML or build HTML using JavaScript.Returning HTML from a functionOne way to dynamically generate HTML is to return a string of HTML from a function. For example, let's say we have a function that generates a list item −function generateListItem(text) { return '' + text + ''; }We can then use this function to generate HTML −function ... Read More
The greatest common divisor (GCD) of two or more numbers, also known as the greatest common factor (GCF) or highest common factor (HCF), is the largest positive integer that divides a given number without a remainder. In other words, the GCD is the largest number that is a divisor of both numbers.For example, the GCD of 24 and 36 is 12.How to calculate the GCD of two numbers?There are a few different ways to calculate the GCD of two numbers, but the most common method is the Euclidean algorithm.The Euclidean algorithm is an iterative method that starts with two numbers, ... Read More
The parseInt() is a built-in function in JavaScript that parses a string and returns an integer. However, there are times when we want to convert a string into an integer without using this function. In this article, we'll explore how to do just that.Using the unary plus operatorOne way to convert a string into an integer is by using the unary plus operator. This operator converts its operand into a number. For instance, the following program converts the string "123" into the number 123 −Example 1 Examples ... Read More