![]() ![]() Swift's readLine() method does exactly what your inputString() method is supposed to be doing, and by default, it strips the newline character off the end for you (there's an optional parameter you can pass to prevent the method from stripping the newline). But there's a way simpler pure Swift approach: readLine(). 1 2 3 4 5 6 let names 'John', 'William', 'Elijah', 'Michael' let convertedNames names.map(name > name.toLowerCase()) console. The uppercased() method converts all lowercase characters in a string into uppercase characters. In just four days, learn how to create your own. Here, we will use the string method toLowerCase () along with an array map () method to convert the all array values into the LowerCase. Swift String uppercased() In this tutorial, we will learn about the Swift String uppercased() method with the help of examples. If you need the lowercase or uppercase version of an operating system identifier, such as a file name, named pipe, or registry key, use the ToLowerInvariant or ToUpperInvariant methods. I feel it's really important to mention here that your inputString method is really clunky and requires importing modules. To fix this, you can wrap your substring in a String initializer like this: let quote 'The revolution will be Swift' let substring quote.dropFirst(23) let realString String(substring) SPONSORED Build a functional Twitter clone using APIs and SwiftUI with Stream's 7-part tutorial series. The casing operation that results from calling the ToLower() method takes the casing conventions of the current culture into account. You should improve your inputString() method to go ahead and trim that newline character before returning its value. So it turns out that your inputString() method is capturing the newline character ( \n) that the user presses to submit their input. That should print the user input with angle brackets on either side of the input.Īnd if you stick that line into your program, you'll see it prints something like this: Your input was This is a snippet on how to convert a string to lowercase in Swift programming language let string 'ALL CAPS' let lowercaseString string. So, whenever you are certain that two strings should be equal, it can be useful to print them with some sort of non-whitespace character on either end of them. HOW TO CONVERT A STRING TO LOWERCASE IN SWIFT A snippet and explanation on how to convert a string to lowercase in Swift programming language. It's important to keep in mind that there is a whole slew of purely whitespace characters that show up in strings, and sometimes, those whitespace characters can lead to problems just like this.
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