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.
Questions tagged [method-missing]
119 questions
26
votes
4 answers
Python equivalent of Ruby's 'method_missing'
What is Python's equivalent of Ruby's method_missing method? I tried using __getattr__ but this hook applies to fields too. I only want to intercept the method invocations. What is the Python way to do it?
missingfaktor
- 86,952
- 56
- 271
- 360
22
votes
15 answers
Are there equivalents to Ruby's method_missing in other languages?
In Ruby, objects have a handy method called method_missing which allows one to handle method calls for methods that have not even been (explicitly) defined:
Invoked by Ruby when obj is sent a message it cannot handle. symbol is the symbol for the…
Justin Ethier
- 122,367
- 49
- 219
- 273
15
votes
2 answers
Ruby’s “method_missing” in Python
Possible Duplicate:
Python equivalent of Ruby's 'method_missing'
Is there any technique available in Python for intercepting messages (method calls) like the method_missing technique in Ruby?
Zeck
- 6,045
- 18
- 67
- 105
13
votes
1 answer
Ruby: why does puts call to_ary?
I'm learning metaprogramming in Ruby and am just trying out defining missing methods via method_missing and define_method. I'm getting some unexpected behaviour and am wondering if anyone can explain this. Here is my class:
class X
def…
Tom De Leu
- 7,676
- 3
- 27
- 29
12
votes
5 answers
What prevents a statically typed language from having something like Ruby's method_missing?
I don't have much experience with statically typed languages (currently learning Scala and loving it!) but one thing I've noticed is that they don't ever seem to have anything like Ruby's method_missing or ColdFusion's onMissingMethod. Is there some…
Dustin Martin
- 1,227
- 2
- 12
- 22
11
votes
4 answers
Does Ruby have a method_missing equivalent for undefined instance variables?
When I invoke a method that doesn't exist, method_missing will tell me the name of the method. When I attempt to access a variable that hasn't been set, the value is simply nil.
I'm attempting to dynamically intercept access to nil instance…
meager
- 209,754
- 38
- 307
- 315
11
votes
1 answer
Is there a "method_missing" for rake tasks?
If my Rakefile does not find a task with a particular name, I'd like rake to instead create a new task by that name according to certain rules, if a file with the missing task name exists. But if it doesn't, I want to fall back to the default…
James Wenton
- 163
- 4
9
votes
2 answers
Objective C and magic methods in class
Does objective-c offer a way to intercept calls to class method that does not exist?
mgamer
- 12,296
- 23
- 84
- 142
9
votes
2 answers
How to compose modules containing method_missing in ruby
I have a couple of modules that extend method missing:
module SaysHello
def respond_to?(method)
super.respond_to?(method) || !!(method.to_s =~ /^hello/)
end
def method_missing(method, *args, &block)
if (method.to_s =~…
David Miani
- 14,178
- 2
- 42
- 63
7
votes
2 answers
Ruby, get hours, seconds and time from Date.day_fraction_to_time
I've found this method here.
start = DateTime.now
sleep 15
stop = DateTime.now
#minutes
puts ((stop-start) * 24 * 60).to_i
hours,minutes,seconds,frac = Date.day_fraction_to_time(stop-start)
I have the following error:
`': private…
dierre
- 6,900
- 11
- 67
- 115
6
votes
1 answer
Method-missing difficulties in C# 4.0: dynamic vs RealProxy
Does anyone know of a way to intercept dynamic method calls (particularly those that are going to raise RuntimeBinderExceptions) with a RealProxy? I was hoping to catch the exception and implement 'method missing' on top of that, but it appears to…
Thom
- 2,584
- 2
- 28
- 32
6
votes
3 answers
Is it possible to replicate Ruby's method_missing in Lua?
I'm fairly sure that in Lua, you can use a given metatable's __index, __newindex, and __call to roughly replicate Ruby's method_missing. And I somewhat have:
function method_missing(selfs, func)
local meta = getmetatable(selfs)
local f
…
Wesley Wigham
- 242
- 2
- 7
5
votes
2 answers
Using method missing in Rails
I have a model with several date attributes. I'd like to be able to set and get the values as strings. I over-rode one of the methods (bill_date) like so:
def bill_date_human
date = self.bill_date || Date.today
date.strftime('%b %d, %Y')
…
tybro0103
- 43,805
- 32
- 138
- 167
5
votes
1 answer
Doesn't Lua have something comparable to Ruby's method_missing?
I seem to recall Lua has something similar to Ruby's method_missing. Or am I remembering incorrectly?
Dexygen
- 11,681
- 11
- 73
- 144
5
votes
2 answers
Missing Value in Data Analysis
I have a data set in which the variable GENDER containing two levels Male(M) and Female(F) has lot of Missing values . How do i deal with missing value? What are the different methods to handle these missing values. Any help would be appreciated.
Milan Amrut Joshi
- 197
- 1
- 10