Programming Articles - Page 509 of 3363

In Java, Array is an object. It is a non-primitive data type which stores values of similar data type. As per the problem statement we have to arrange all elements of array such that negative elements are present before positive elements. If a number is greater than 0 then it is called as positive number, if less than 0 then it is called as negative number. Note − The array must be an integer array. Let’s explore the article to see how it can be done by using Java programming language. To Show You Some Instances Instance-1 Suppose the ... Read More

In TypeScript, while working with the array, we often require to search for a particular element. To search for an element, either we can use the naive approach using the for loop or some built-in method such as the find() or indexOf() method. Also, we will learn to find the particular object in the array based on the object property. Using the for-of Loop to Search a Particular Element in The Array The naive approach to searching for an element is using linear search. In linear search, we need to iterate through the array using the for loop and check ... Read More

This tutorial demonstrates multiple ways to reverse a string in TypeScript. At first, reversing the string problem looks easy, but what if someone asks you to explain the different approaches to reversing a string in TypeScript? For example, what if the interviewer asks to reverse the words of the string rather than reversing every character of the string? Here, we will learn to reverse every character or word of the string in TypeScript. Using the for-of Loop to Reverse a String in TypeScript The naive approach to reverse the string uses the normal for loop or for-of loop. Here, we ... Read More

Sometimes, we need to replace a substring with a new string or any particular character while working with TypeScript. The simple way to replace the substring or part of the string is to use the replace() method. Here, we will create a custom algorithm to replace the string for the interview purpose of the beginners. However, we will also see the replace() method at last in this tutorial. Create the Custom Algorithm to Replace the Substring We will use the for loop to iterate through the main string in this part. We will use the substr() method of the string ... Read More

The array stores the elements of the different data types in TypeScript. It is a collection of elements we can use it to store and access data whenever required. While working with multiple arrays, we need to combine two or more arrays. There are several ways to combine multiple arrays in TypeScript, and we will look through all ways in this TypeScript tutorial. Also, we will discuss when we should use which way is the best at last. Uing The For Loop to Join The Two Arrays We can follow the traditional way of using the for-of loop to join ... Read More

Type assertion is a mechanism in TypeScript that informs the compiler of the variable type. We can override the type using a type assertion if TypeScript finds that the assignment is wrong. We must be certain that we are correct since the assignment is always legitimate when we employ a type assertion. If not, our program might not operate properly. Declaratively informing the compiler that we intend to regard the item as a distinct type is known as type assertion. Using this, we can regard any as a number or a number as a string. When moving code from JavaScript ... Read More

In TypeScript, the typeof is one of the most helpful operators and keywords to check the types of variables or identifiers. However, TypeScript is a type-strict language. So, we need to define the type of the variable or object while defining the identifier itself. Still, sometimes we need to check the type of the variable. For example, we are taking the data from the user via forms and handling it via TypeScript. Then we have to validate the data and perform some database operations. Also, the identifier can have multiple types in TypeScript. So, using the typeof operator, we can ... Read More

We will learn to specify the option properties in TypeScript. The true meaning of the optional property is that properties can be undefined or null, and we can initialize them whenever required. In real-time development, the importance of optional properties is very much. For example, we are fetching the data from the API and performing some operations on the data. If you try to use the data without getting it due to the database server being down or if there is any other problem, it will raise an error. In such case, we can make the data property optional and ... Read More

The string contains various characters, and the substring is the part of the string. We can get the substring from the string two ways. The first is using the starting and ending position of the substring, and the second is using the starting position and length of the substring. We will learn both ways to get the substring from the string in TypeScript in this tutorial. Get The Substring Using The Start Position and End Position In TypeScript, indexing of string starts from zero. So, if we have a zero-based starting and ending position of the substring, we can get ... Read More

The natural logarithm is the logarithm of any numeric value to the base e. Here e is Euler's constant, and the value of Euler’s constant is approximately 2.718. In TypeScript, we can use the built-in library methods to find the natural logarithm of any numeric value greater than or equal to zero. Using the Math.log() Method Math is a library of TypeScript which contains all the methods to perform mathematical operations. Inside the Math object, all methods are static. So, we can directly access all methods by taking Math (object name) as a reference. The math method also contains the ... Read More