Use double quotes while using BASH variables. mysql –user=”$user” –password=”$password” –database=”$database” –execute=”DROP DATABASE $user; CREATE DATABASE $database;” BASH doesn’t expand variables in single quotes.
Pattern p = Pattern.compile(“[^a-z0-9 ]”, Pattern.CASE_INSENSITIVE); Matcher m = p.matcher(“I am a string”); boolean b = m.find(); if (b) System.out.println(“There is a special character in my string”);
There are reserved characters, that have a reserved meanings, those are delimiters — :/?#[]@ — and subdelimiters — !$&'()*+,;= There is also a set of characters called unreserved characters — alphanumerics and -._~ — which are not to be encoded. That means, that anything that doesn’t belong to unreserved characters set is supposed to be … Read more
Two ways: Escape it with another ampersand (&&). Set UseMnemonic for that label to false. This causes all ampersands within the text to be taken literally so you don’t need to double any of them. You’ll lose the underlining and access key features though. You can set the value either in the designer, or in … Read more
Type: ctrl–v ctrl–m On Windows Use: ctrl–q ctrl–m Ctrl–V tells vi that the next character typed should be inserted literally and ctrl–m is the keystroke for a carriage return.
Unicode Standard for Media Control Symbols Pause: ⏸︎ The Unicode Standard 13.0 (update 2020) provides the Miscellaneous Technical glyphs in the HEX range 2300–23FF Miscellaneous Technical Given the extensive Unicode 13.0 documentation, some of the glyphs we can associate to common Media control symbols would be as following: Keyboard and UI symbols 23CF ⏏︎ Eject … Read more
I’d use tr: tr < file-with-nulls -d ‘\000’ > file-without-nulls If you are wondering if input redirection in the middle of the command arguments works, it does. Most shells will recognize and deal with I/O redirection (<, >, …) anywhere in the command line, actually.
You can use a pseudo-element to insert that character before each list item: ul { list-style: none; } ul li:before { content: ‘✓’; } <ul> <li>this is my text</li> <li>this is my text</li> <li>this is my text</li> <li>this is my text</li> <li>this is my text</li> </ul>
Use < for < > for > & for &
Your result will vary depending on what kind of terminal or console program you’re on, but yes, on most \b is a nondestructive backspace. It moves the cursor backward, but doesn’t erase what’s there. So for the hello worl part, the code outputs hello worl ^ …(where ^ shows where the cursor is) Then it … Read more