Programming Articles - Page 310 of 3363

In Swift, we can easily get a character from the given string with the help of their respective index value. So to get the index of the specified character Swift provides an inbuilt function named index(). This function will return an index which is the specified distance from the specified index. Example Input: String = "Ram got first place" index = 5 Output: "o" Here, the given index value is 5 so the resultant character is “o”. Syntax func index(x:String.index, offsetBy: Int) Here, x is the valid index of the sequence and offsetBy is the ... Read More

In Swift, a string is a collection of characters so it can contain duplicate as well as unique characters. So to find the duplicate characters in a string we create a dictionary/array to store the count of each character and then add those characters in the array whose count is greater than 1. Example Input: “sky is pink” Output: Duplicate char: [“s”, “i”, “k”] Here, the input string contains three duplicate characters that are “s”, “i”, and “k”. To find the duplicate characters in a string we are going to use the following methods − User-defined function ... Read More

In Swift, String interpolation is a great feature to create a new string by embedding the value of a variable, constant, function and literal directly in the given string literal. Or we can say that using string interpolation we can create a string by combining static text and dynamic values. Syntax var myString = “hello! \(x). How are you?” We can perform string interpolation by wrapping a string literal or constant or variable in a pair of parentheses that is prefixed by a backslash(\) for example, \(x). Example 1 In the following Swift program, we will demonstrate how ... Read More

In Swift, a string is a sequence of characters that represent in between double quotes, for example: ”Learn Swift”, “tutorialspoint”, etc. But when you print the string double quotes were removed by the compiler and you will get Learn Swift, tutorialspoint in the output. So if you want to print double quotes in the output, then you have to place the backslash character or escape character(\) before the double quotes you want to print inside the given string. It tells the compiler that the character should be treated as a literal character, it is not part of string syntax. ... Read More

In Swift, escape sequence characters are those characters who do not represent themselves when they are used inside a string. Instead, they tell the compiler to perform the specified task. They are non-printable characters. Swift supports the following escape sequence characters in the string − Escape Sequence Characters Description It is a newline character. It tells the compiler to move to the new line. \t It is known as the horizontal tab. It tells the compiler to leave the tab. \r It is known as carriage return. It tells ... Read More

In Swift, a random string is a sequence of characters. It is generated by randomly selecting characters from a set of available characters, for example: “fbbKDvf”, “dvsWFVsvdv”, etc. So to create random strings Swift provides the following methods − Using randomElement() method Using UUID Method 1: Using randomElement() method Swift provides an inbuilt function named as randomElement() method. This function returns a random element from the given sequence or collection. Syntax func randomElement() It returns random elements. If the given collection is empty, then it will return nil. Algorithm Step 1 − Create a ... Read More

In Swift, a substring is a small sequence of characters present in the large string, for example, “Car color is blue”, then “Car”, “color”, “is”, and “blue” are the substrings of the given string. Swift provides the following methods to check if the string contains the specified substring or not − Using range(of:) method Using contains() method Using Regex Method 1: Using range(of:) method The range(of:) method is used to find the range of the first occurrence of the given substring in the string. So using this method we can check if the given substring is present in ... Read More

Text data manipulation and processing can benefit from using a Python program that will eliminate the last specified character from a string. This kind of application can be used to modify data by deleting particular characters, validate user input by removing incorrect characters, and clean up the text by removing unwanted characters. In Python, we have some string in-built functions like rstrip() that remove the last specified character from the string. The slicing technique is the easier way to remove the character from the end. Syntax The following syntax is used in the examples − len() The len() ... Read More

Replacing characters in a string with specified characters is a common text-processing method with many different applications. There are some examples like Data transformation, text normalization, and data cleansing. In Python, we have some string in-built functions that can be used to convert a string into an array of characters based on the specified character. The group of characters to form a word is called a string. In this program, we need an empty string to store the new string in it. Syntax The following syntax is used in the examples − replace() The replace() is an inbuilt function ... Read More

Python has inbuild functions like lstrip(), strip(), and rstrip() that can be used to remove the character from both sides. The term trim the string of characters means to remove the character from the given string. For example − Given string is ‘iiiiiiiiiiiBOXERiiiiiiiiii’ and the character ‘i’ from both sides. The final result becomes BOXER. Syntax The following syntax is used in the examples − strip() This is a predefined method used in Python to trim the character from both sides of the string. [1:] [:-1] [1:] − This represents the after-slicing on the left side to ... Read More