Webbeval(p1, p2 = v2, p3 = v3, p4 = v4) public Evaluates the Ruby expression (s) in string. If binding is given, which must be a Binding object, the evaluation is performed in its … Webb9 mars 2024 · Please note, that using public_send is safer, than send, because latter does not care about the method's visibility and would work with protected and private …
Evaluation Options in Ruby - InfoQ
Webb20 dec. 2011 · Here's an example of what I'd like the method to eval to. def index @title = "Index of Books" @q = Book.where(:client_id => … WebbUse ClassName.class_eval to define an instance method (one that applies to all of the instances of ClassName ). To understand why this is true, let's go through some examples, starting with the following code: class MyClass def initialize (num) @num = num end end a = MyClass.new (1) b = MyClass.new (2) Before we get going, remember that in Ruby ... fancyfiets
send (Object) - APIdock
Webbclass Binding. Objects of class Binding encapsulate the execution context at some particular place in the code and retain this context for future use. The variables, methods, value of self, and possibly an iterator block that can be accessed in this context are all retained. Binding objects can be created using Kernel#binding, and are made ... WebbEval and Bindings Many scripting languages have a facility to allow an arbitrary string to be executed at runtime. In Ruby, that feature comes from the eval method. Here's an example of that method: >> eval ("2 + 2") => 4 By default, variables in the code string are evaluated in the current context, as follows: Webb26 maj 2015 · Ruby has methods to get the names of local and global variables, but it lacks methods to get or set their values based on these names. The only way to do AFAIK is with eval. Any other use is almost certainly wrong. coresight tpiu