read first 8 characters of text file with bash
You can ask head to read a number of bytes. For your particular case: $ head -c 8 <file> Or in a variable: foo=$(head -c 8 <file>)
character
How to concatenate characters in java?
Do you want to make a string out of them? String s = new StringBuilder().append(char1).append(char2).append(char3).toString(); Note that String b = “b”; String s = “a” + b + “c”; Actually compiles to String s = new StringBuilder(“a”).append(b).append(“c”).toString(); Edit: as litb pointed out, you can also do this: “” + char1 + char2 + char3; That … Read more
How add separator to string at every N characters in swift?
Swift 5.2 • Xcode 11.4 or later extension Collection { func unfoldSubSequences(limitedTo maxLength: Int) -> UnfoldSequence<SubSequence,Index> { sequence(state: startIndex) { start in guard start < endIndex else { return nil } let end = index(start, offsetBy: maxLength, limitedBy: endIndex) ?? endIndex defer { start = end } return self[start..<end] } } func every(n: Int) -> … Read more
Java – what are characters, code points and surrogates? What difference is there between them?
To represent text in computers, you have to solve two things: first, you have to map symbols to numbers, then, you have to represent a sequence of those numbers with bytes. A Code point is a number that identifies a symbol. Two well-known standards for assigning numbers to symbols are ASCII and Unicode. ASCII defines … Read more
How to get string from ASCII code in Swift?
As a character: let c = Character(UnicodeScalar(65)) Or as a string: let s = String(UnicodeScalar(UInt8(65))) Or another way as a string: let s = “\u{41}” (Note that the \u escape sequence is in hexadecimal, not decimal)
getch and arrow codes
By pressing one arrow key getch will push three values into the buffer: ‘\033’ ‘[‘ ‘A’, ‘B’, ‘C’ or ‘D’ So the code will be something like this: if (getch() == ‘\033’) { // if the first value is esc getch(); // skip the [ switch(getch()) { // the real value case ‘A’: // code … Read more
Output single character in C
yes, %c will print a single char: printf(“%c”, ‘h’); also, putchar/putc will work too. From “man putchar”: #include <stdio.h> int fputc(int c, FILE *stream); int putc(int c, FILE *stream); int putchar(int c); * fputc() writes the character c, cast to an unsigned char, to stream. * putc() is equivalent to fputc() except that it may … Read more
How to convert an Int to a Character in Swift
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))) }
How to iterate over a String, char by char, in Dart?
An alternative implementation (working with characters outside the basic multilingual plane): “A string”.runes.forEach((int rune) { var character=new String.fromCharCode(rune); print(character); });