You can change your input text as below: <input type=”text” pattern=”[a-zA-Z0-9!@#$%^*_|]{6,25}” /> So the code changes look like below: <form action=”#” method=”get”> User Name:<br /> <input type=”text” pattern=”[a-zA-Z0-9!@#$%^*_|]{6,25}” /><br /> Password:<br /> <input type=”password” /><br /> <input type=”submit” value=”Log In” /> </form> This will work without using JavaScript. pattern can be used instead. It is … Read more
You can’t convert an integer directly to a Character instance, but you can go from integer to UnicodeScalar to Character and back again: let startingValue = Int((“A” as UnicodeScalar).value) // 65 for i in 0 ..< 26 { print(Character(UnicodeScalar(i + startingValue))) }
Swift 4.0 (also Swift 5.0) var str = “Hello, World” // “Hello, World” str.dropLast() // “Hello, Worl” (non-modifying) str // “Hello, World” String(str.dropLast()) // “Hello, Worl” str.remove(at: str.index(before: str.endIndex)) // “d” str // “Hello, Worl” (modifying) Swift 3.0 The APIs have gotten a bit more swifty, and as a result the Foundation extension has changed … Read more
Figured this out by doing the following (pagesubtitle is the name of the text field in the form): $reportSubtitle = stripslashes($_POST[‘pagesubtitle’]); $reportSubtitle = iconv(‘UTF-8’, ‘windows-1252′, $reportSubtitle); Then print it out: $pdf->Write (6, $reportSubtitle); This will remove any unwanted slashes following apostrophes, as well as use the ‘iconv’ function to print special characters such as ™
Pass a negative value as the length argument (the 3rd argument) to substr(), like: $result = substr($string, 3, -3); So this: <?php $string = “Sean Bright”; $string = substr($string, 3, -3); echo $string; ?> Outputs: n Bri
It can be done from assembly, but it isn’t easy. You can’t use int 21h, that’s a DOS system call and it isn’t available under Linux. To get characters from the terminal under UNIX-like operating systems (such as Linux), you read from STDIN (file number 0). Normally, the read system call will block until the … Read more
Because there’s no null terminator. In C a “string” is a sequence of continuous bytes (chars) that end with a sentinel character called a null terminator (‘\0′). Your code takes the input from the user and fills all 5 characters, so there’s no “end” to your string. Then when you print the string it will … Read more
with open(filename) as f: while True: c = f.read(1) if not c: print(“End of file”) break print(“Read a character:”, c)
EOF is not a character (in most modern operating systems). It is simply a condition that applies to a file stream when the end of the stream is reached. The confusion arises because a user may signal EOF for console input by typing a special character (e.g Control-D in Unix, Linux, et al), but this … Read more