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Swift Articles
Page 3 of 40
Swift Program to Reverse a String Using Stacks
A stack is a data structure which works on LIFO(last in first out) principle. It is used to store and manage data where the recently added item is the first one to be removed from the stack. Stack support the following operations − Push − It is used to add elements to the stack. So in Swift, we achieve push operation by the append() method. Syntax func push(_ items: T) { item.append(items) } Here, the append() function pushes a new element in the item stack. Pop − It is used to remove ...
Read MoreSwift Program to Sort a String
In Swift, sorting of a string means arranging the characters of the string in the specified order either in ascending or descending order. For example − Input: String = "color of the bird is pink" Output:" bcdefhiiiklnoooprrst" Here, the resultant string is sorted in ascending order. So to sort a string Swift provides an inbuilt function named sorted() function. This function returns a sorted string in which the characters of the string are stored in either ascending or descending order. This function can be defined in two types with and without parameters. ...
Read MoreSwift Program to trim a string from both sides
In Swift, we can adjust the size of the string by trimming some specified number of characters from both sides of the string. Or we can also trim the extra whitespaces which we do not want from both sides of the original string using the following methods. Method 1: Trim a string from the both sides To trim a specified number of characters or a substring from both sides of the string we create a user-defined function which takes an input string and the length of the characters which we wanted to remove from both sides of the original ...
Read MoreSwift program to Convert Celsius to Fahrenheit
Fahrenheit is the commonly used temperature-measuring unit. In this scale, the freezing point and boiling point of the water are 32 degrees and 212 degrees. Whereas Celsius is also a temperature-measuring scale. In the Celsius scale, the freezing point and the boiling point of the water are 0 degrees and 100 degrees. So in Swift, we can convert Celsius to Fahrenheit using the following methods − Using Formula Using converted() method Method 1: Using Formula We can easily convert Celsius to Fahrenheit using the mathematical formula. It is the easiest way to convert Celsius to Fahrenheit. Syntax ...
Read MoreSwift program to find the longest word in a string
In Swift, a string is a sequence of characters. So a string can contain small and larger words. Hence using the following methods we can find the largest word in the string. Using component() method Using user-defined method Example Input String: "Rabbit run fast" Output String: "Rabbit" Here, the largest word among all the given words in the string is “Rabbit”. Method 1: Using component() method The components() method is used to create an array of substrings from the given string, where each substring is separated by the specified separator. So here we use the components(separatedBy:.whitespaces) method ...
Read MoreSwift program to generate a password
A password is a combination of various characters of a specified length and is used to authenticate or gain access to the system or login to an account. It is designed for security purposes and ensures that only an authorized user can access or log in to the specific account. It is important to select a strong password so that other people cannot crack it. It is generated according to the following conditions − Contains at least one uppercase letter. Contains at least one lowercase letter. Contains at least one number. Length must be 8 characters Contains at ...
Read MoreSwift program to generate an OTP
An OTP is known as a one-time password. It is an automatically generated random numeric string which is used for a single login session or transaction on digital devices. It is generally used to enhance security by providing extra authentication. For example, “423193”, “489201’, etc. To generate OTP Swift provides the following methods − Using random() method Using randomElement() method Method 1: Using random() method As we know that OTP is a randomly generated string. So to generate a random string Swift provide an inbuilt function named as random(). It is used to create a random string of ...
Read MoreSwift Program to Replace a Character at a Specific Index
To replace a character at a specified index with a new character Swift support the following methods − Using replaceSubrange() method. Using the append() method. Using replacingCharacters(in:with:). Using these methods you can replace any character from the given string with a new character. For Example Input: String = "Pink Bike" Index = 5 Character = "O" Output: "Pink Oike " Here, we replaced the character present on index 5 which is “B” with “O”. Method 1: Using the replaceSubrange() method To replace a character at a specified index in the given ...
Read MoreSwift Program to Remove leading zeros
While working with strings sometimes we encounter some numeric strings whose leading numbers are zeros, e.g. 000003232, 00321, etc. To remove leading zeros from a numeric string − Using removeFirst() and hasPrefix() methods Using firstIndex() and dropFirst() methods Example Input: String = "000003231" Output: "3231 " Here, the input string contains 5 leading zeros so we remove these zeros from the input string so the resultant string is 3231. Method 1: Using removeFirst() and hasPrefix() methods So to remove leading ...
Read MoreSwift Program to Print first letter of each word using regex
In Swift, regex is known as a regular expression. It is used to create a pattern which helps in matching or extracting some specific port of the given string. We can create a regex instance with the help of a regular expression in regex literal or string. In this article, we are going to use regex to print the first letter of each word. Example Input: String = "Ram got first place" Output: "Rgfp " Here, the output string contains the first letters of each word present in the given string. In the following examples we are going to ...
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