Use scanf(“%d”,&rows) instead of scanf(“%s”,input) This allow you to get direcly the integer value from stdin without need to convert to int. If the user enter a string containing a non numeric characters then you have to clean your stdin before the next scanf(“%d”,&rows). your code could look like this: #include <stdio.h> #include <stdlib.h> int … Read more
Use the raw_input() function to get input from users (2.x): print “Enter a file name:”, filename = raw_input() or just: filename = raw_input(‘Enter a file name: ‘) or if in Python 3.x: filename = input(‘Enter a file name: ‘)
Regarding Pax’ solution: it doesn’t work if user clicks more than one button intentionally or accidentally. Don’t ask me how I know :-(. The correct code should be like that: var mouseDown = 0; document.body.onmousedown = function() { ++mouseDown; } document.body.onmouseup = function() { –mouseDown; } With the test like this: if(mouseDown){ // crikey! isn’t … Read more
Is it ever useful to use Python 2’s input over raw_input? No. input() evaluates the code the user gives it. It puts the full power of Python in the hands of the user. With generator expressions/list comprehensions, __import__, and the if/else operators, literally anything Python can do can be achieved with a single expression. Malicious … Read more
Another solution. Perfect if there are other non-number pad text fields on the screen. – (void)viewDidLoad { [super viewDidLoad]; UIToolbar* numberToolbar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 50)]; numberToolbar.barStyle = UIBarStyleBlackTranslucent; numberToolbar.items = @[[[UIBarButtonItem alloc]initWithTitle:@”Cancel” style:UIBarButtonItemStyleBordered target:self action:@selector(cancelNumberPad)], [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil], [[UIBarButtonItem alloc]initWithTitle:@”Apply” style:UIBarButtonItemStyleDone target:self action:@selector(doneWithNumberPad)]]; [numberToolbar sizeToFit]; numberTextField.inputAccessoryView = numberToolbar; } -(void)cancelNumberPad{ [numberTextField resignFirstResponder]; … Read more
You can replace System.in with you own stream by calling System.setIn(InputStream in). InputStream can be a byte array: InputStream sysInBackup = System.in; // backup System.in to restore it later ByteArrayInputStream in = new ByteArrayInputStream(“My string”.getBytes()); System.setIn(in); // do your thing // optionally, reset System.in to its original System.setIn(sysInBackup); Different approach can be make this method … Read more
With Spring MVC, there are 3 different ways to perform validation : using annotation, manually, or a mix of both. There is not a unique “cleanest and best way” to validate, but there is probably one that fits your project/problem/context better. Let’s have a User : public class User { private String name; … } … Read more
Use getpass.getpass(): from getpass import getpass password = getpass() An optional prompt can be passed as parameter; the default is “Password: “. Note that this function requires a proper terminal, so it can turn off echoing of typed characters – see “GetPassWarning: Can not control echo on the terminal” when running from IDLE for further … Read more
Under Windows, you need the msvcrt module, specifically, it seems from the way you describe your problem, the function msvcrt.getch: Read a keypress and return the resulting character. Nothing is echoed to the console. This call will block if a keypress is not already available, but will not wait for Enter to be pressed. (etc … Read more
sentinel=”” # ends when this string is seen for line in iter(input, sentinel): pass # do things here To get every line as a string you can do: ‘\n’.join(iter(input, sentinel)) Python 2: ‘\n’.join(iter(raw_input, sentinel))