The url package also supports entering tildes directly, e.g.Info about How To Type An Nye How to type Nye on laptop? There are many options to choose. The sim command produce a tilde-like binary relation symbol that is often used in mathematical expressions, and the double-tilde is obtained with approx. In "text mode" of the LaTeX typesetting language a tilde diacritic can be obtained using, e.g., ~. In the Inform programming language, the tilde is used to indicate a quotation mark inside a quoted string. Also, in pattern-matching, the tilde is used to indicate a lazy pattern match. In Haskell, the tilde is used in type constraints to indicate type equality. =~ and =~ can in Groovy be used to match a regular expression. Given an integer it will negate the integer bitwise like in different C variants. Given a String the method will produce a. In the Groovy programming language the tilde character is used as an operator mapped to the bitwiseNegate method. is_equal ( b), the expression a ~ b is type-safe even in the presence of covariance. If a and b are references, the object equality expression a ~ b is to be contrasted with a = b which denotes reference equality. If a and b denote objects, the boolean expression a ~ b has value true if and only if these objects are equal, as defined by the applicable version of the library routine is_equal, which by default denotes field-by-field object equality but can be redefined in any class to support a specific notion of equality. In Eiffel, the tilde is used for object comparison. For example what to do with "120" + "14" ? Is this a string "134" (addition of two numbers), or "12014" (concatenation of strings) or something else? D disallows + operator for arrays (and strings), and provides separate operator for concatenation (similarly PHP programming language solved this problem by using dot operator for concatenation, and + for number addition, which will also work on strings containing numbers).
It was introduced because plus operator can have different meaning in many situations. Tilde operator can be overloaded for user types, and binary tilde operator is mostly used to merging two objects, or adding some objects to set of objects. In the D programming language, the tilde is used as an array concatenation operator, as well as to indicate an object destructor and binary not operator.
In the CSS stylesheet language, the tilde is used for the indirect adjacent combinator as part of a selector.
In C++ and C#, the tilde is also used as the first character in a class's method name (where the rest of the name must be the same name as the class) to indicate a destructor – a special method which is called at the end of the object's life. In the C, C++ and C# programming languages, the tilde character is used as bitwise NOT operator, following the notation in logic (an ! causes a logical NOT, instead). In APL and MATLAB, tilde represents the monadic logical function NOT. variable !~ / regex/ returns false if the variable is matched.Ī variant of this, with the plain tilde replaced with =~, was adopted in Perl, and this semi-standardization has led to the use of these operators in other programming languages, such as Ruby or the SQL variant of the database PostgreSQL.variable ~ / regex/ returns true if the variable is matched.The tilde is used in the AWK programming language as part of the pattern match operators for regular expressions: