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Questions tagged [method-missing]

The Ruby method that is invoked on an object when you send it a message (or call a method) that it doesn't understand.

The method_missing method is used to respond to methods when you don't know what methods you need to understand until runtime.

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ActionMailer method missing "default_url_setting"

When I run my rails app in development mode, it runs fine. When I run it in production mode, though, it crashes on launch, and I get this output from the…
Mason
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Can anyone explain this Ternary and the method_missing part of the code?

class Numeric @@currencies = {'yen' => 0.013, 'euro' => 1.292, 'rupee' => 0.019, 'dollar' => 1.0} def method_missing(method, *args) singular_currency = (method == :in ? args.first : method).to_s.gsub(/s$/, '') if…
Shivam Chopra
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How do I delegate methodMissing calls to nested classes?

I'd like to create a DSL with syntax like: Graph.make { foo { bar() definedMethod1() // isn't missing! } baz() } Where when the handler for this tree encounters the outermost closure, it creates an instance of some…
Mark Elliot
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Redefine nil in smalltalk to respond any message

I want to redefine smalltalk's nil to work like the one in objective-c. So when nil receives a message that it can't handle, it returns nil. Now I know that nil is just a shortcut for UndefinedObject but is there anything like method_missing in Ruby…
Uko
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Ruby - ArgumentError: wrong number of arguments (2 for 1)

I have the following class overwrite: class Numeric @@currencies = {:dollar => 1, :yen => 0.013, :euro => 1.292, :rupee => 0.019} def method_missing(method_id) singular_currency = method_id.to_s.gsub( /s$/, '').to_sym if…
8vius
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after uninstall a package i get the error: missing gradle project configuration folder:.setting java(0)

click to see the problem I receive the error when I uninstalled react-native-youtube and react-native-video thos two packages. "npm uninstall react-native-youtube --no--save", "npm uninstall react-native-video --no--save" I Uninstalled those package…
Md Arif Islam
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Conditionally filling missing data based on other variables in R

enter image description here sorry for adding the screenshot, I download data from https://www.kaggle.com/datasets/rikdifos/credit-card-approval-prediction Can someone inform me about the way to fill those NA values that the occupation column has? I…
tara
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No macro for Power Query in Excel 2013

I installed "Power Query" in Excel 2013. Works fine. However it doesn't support VBA. No code is generated when I try to make a macro with the macro recorder. What I am doing wrong?
John
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Rspec - Argument error after overwriting method_missing and respond_to_missing

I have a controller that i want to write rspec for results_controller.rb class Api::V1::ResultsController < Api::V1::ApplicationController before_action :devices include DataHelper def show results = get_dr_results render json: {…
Suganya Selvarajan
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Implement method_missing in Rails

I'm using the OMDB API to learn about using 3rd Party apis in Rails. I've setup my app so all I have to input is the movie title and 6 other attributes get populated from the OMDB API. All of the method calls to retrieve the data from the api are…
hashrocket
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missing parameter type scala

I typed the following in scala: def count(e: Int, list: List[Int]): Int = list.foldLeft(e)((sum) => list match { case x::xs if e == x => sum = sum + 1 case Nil => sum }) Why am I getting an error on the second Line…
user13370875
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method_missing and association_proxy in rails

So, here's my problem. I currently am building a simple authentication system for a rails site. I have 3 classes for this: Person, Session, and Role. In my Person model I have defined method_missing to dynamically capture roles according to this…
Trevor
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Throw custom exception in `method_missing` without calling .new

I'm redefining method_missing for a proxy-style object. I would like to be able to throw a custom NoMethodError (or some other error if NoMethodError is a particular problem, I used an ArgumentError below) to give the caller more information as to…
not_user9123
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Xamarin c# SetLooping missing

I'm novice in programming and this is my first project ever in c# xamarin. I want to set loop on that MediaPlayer but SetLooping method is missing in Android.Media. I'm using Visual Studio 2017 Community. Here is my code. Thanks in advance for any…
bariks
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Difference between calling method_missing in Ruby with and without parentheses

Is there any possibility to establish in method_missing declaration in Ruby whether a given missing_method was called (without any arguments) using parentheses notation, ie: foo.non_existing_method() or using parentheses-less…
mgamer
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