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More generally, an equation E=F between regular-expression terms with variables holds if, and only if, its instantiation with different variables replaced by different symbol constants holds. [30] [31] Every regular expression can be written solely in terms of the Kleene star and set unions over finite words. This is a surprisingly difficult ...
In contrast, a character entity reference refers to a character by the name of an entity which has the desired character as its replacement text. The entity must either be predefined (built into the markup language) or explicitly declared in a Document Type Definition (DTD). The format is the same as for any entity reference: &name;
Non-breaking space (°) is a space character that prevents an automatic line break at its position. Pilcrow (¶) is the symbolic representation of paragraphs. Line break (↵) breaks the current line without new paragraph. It puts lines of text close together. Tab character (→) is used to align text horizontally to the next tab stop.
If the character is not found most of these routines return an invalid index value – -1 where indexes are 0-based, 0 where they are 1-based – or some value to be interpreted as Boolean FALSE. This can be accomplished as a special case of #Find , with a string of one character; but it may be simpler or more efficient in many languages to ...
A simple and inefficient way to see where one string occurs inside another is to check at each index, one by one. First, we see if there is a copy of the needle starting at the first character of the haystack; if not, we look to see if there's a copy of the needle starting at the second character of the haystack, and so forth.
Interpunct, Period: Decimal separator: ♀ ♂ ⚥ Gender symbol: LGBT symbols ` Grave (symbol) Quotation mark#Typewriters and early computers ̀: Grave (diacrictic) Acute, Circumflex, Tilde: Combining Diacritical Marks, Diacritic > Greater-than sign: Angle bracket « » Guillemet: Angle brackets, quotation marks: Much greater than Hedera
1. Click the Settings icon | select More Settings. 2. Click Filters. 3. Click Add new filters. 4. Enter the filter name, set the filter rules, and choose or create a folder for the emails.
Unicode's U+FEFF ZERO WIDTH NO-BREAK SPACE character can be inserted at the beginning of a Unicode text to signal its endianness: a program reading such a text and encountering 0xFFFE would then know that it should switch the byte order for all the following characters. Its block name in Unicode 1.0 was Special. [5]