Converting String Array to an Integer Array

You could read the entire input line from scanner, then split the line by , then you have a String[], parse each number into int[] with index one to one matching…(assuming valid input and no NumberFormatExceptions) like String line = scanner.nextLine(); String[] numberStrs = line.split(“,”); int[] numbers = new int[numberStrs.length]; for(int i = 0;i < … Read more

Swift How to get integer from string and convert it into integer

Swift 3/4 let string = “0kaksd020dk2kfj2123” if let number = Int(string.components(separatedBy: CharacterSet.decimalDigits.inverted).joined()) { // Do something with this number } You can also make an extension like: extension Int { static func parse(from string: String) -> Int? { Int(string.components(separatedBy: CharacterSet.decimalDigits.inverted).joined()) } } And then later use it like: if let number = Int.parse(from: “0kaksd020dk2kfj2123”) { … Read more

Why don’t languages raise errors on integer overflow by default?

In C#, it was a question of performance. Specifically, out-of-box benchmarking. When C# was new, Microsoft was hoping a lot of C++ developers would switch to it. They knew that many C++ folks thought of C++ as being fast, especially faster than languages that “wasted” time on automatic memory management and the like. Both potential … Read more

What is the difference between the float and integer data type when the size is the same?

float stores floating-point values, that is, values that have potential decimal places int only stores integral values, that is, whole numbers So while both are 32 bits wide, their use (and representation) is quite different. You cannot store 3.141 in an integer, but you can in a float. Dissecting them both a little further: In … Read more