On my Emacs version (24.3) no additional modules are needed. It’s enough to launch M-x whitespace-mode To customize go to whitespace-style variable help, C-h C-h v whitespace-style This mode has many functionalities. To made it simpler one may choose not to use `Face visualization’.
You could try something like: char ch; fstream fin(“file”, fstream::in); while (fin >> noskipws >> ch) { cout << ch; // Or whatever }
This is a great use for a custom generator: Python 3: def char_range(c1, c2): “””Generates the characters from `c1` to `c2`, inclusive.””” for c in range(ord(c1), ord(c2)+1): yield chr(c) then: for c in char_range(‘a’, ‘z’): print(c) Python 2: def char_range(c1, c2): “””Generates the characters from `c1` to `c2`, inclusive.””” for c in xrange(ord(c1), ord(c2)+1): yield … Read more
Unicode has two symbols for unknown characters: □ (WHITE SQUARE, U+25A1) – Replaces a missing or unsupported Unicode character. � (REPLACEMENT CHARACTER, U+FFFD) – Replaces an invalid or unrecognizable character. Indicates a Unicode error. Sources Quora – What symbol is the square box shown for non-representable Unicode characters? FileFormat.Info – Unicode Character ‘WHITE SQUARE’ (U+25A1) … Read more
Like this: str.erase(0,10); …
Although a little more convoluted than I would like, another solution is to use the Chars iterator and its position() function: “Program”.chars().position(|c| c == ‘g’).unwrap() find used in the accepted solution returns the byte offset and not necessarily the index of the character. It works fine with basic ASCII strings, such as the one in … Read more
Optimize the beginning, and anchor it. ^[A-Za-z0-9_]{2}(?:|[A-Za-z0-9_]{2,})$ (Also, you did say to ignore the regex itself, but I guessed you probably wanted 0-9, not 0_9) EDIT Hm, I was sure I read that you want to match lines. Remove the anchors (^$) if you want to match inside the line as well. If you do … Read more
There is an explanation at the end of section 3.3. Aside from dot-segments in hierarchical paths, a path segment is considered opaque by the generic syntax. URI producing applications often use the reserved characters allowed in a segment to delimit scheme-specific or dereference-handler-specific subcomponents. For example, the semicolon (“;”) and equals (“=”) reserved characters are … Read more
Just cast each character to an int: for (int i = 0; i < str.length; i++) Console.Write(((int)str[i]).ToString());
The String#ord method will do the trick: ruby-1.9.2-p136 > ‘x’.ord => 120 ruby-1.9.2-p136 > ‘0’.ord => 48 ruby-1.9.2-p136 > ‘ ‘.ord => 32