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What's the state of the art in email validation for Rails?
...r complex†) EmailValidator to suit your needs.
eg: - your model:
class TestUser
include Mongoid::Document
field :email, type: String
validates :email, email: true
end
Your validator (goes in app/validators/email_validator.rb)
class EmailValidator < ActiveModel::EachValidator
EM...
Python Infinity - Any caveats?
...ing systems implement all this behavior correctly. If you want to be sure, test for infinity prior to doing your calculations.
¹) Recently means since version 3.2.
²) Floating points support positive and negative zero, so: x / float('inf') keeps its sign and -1 / float('inf') yields -0.0, 1 / flo...
What is the list of supported languages/locales on Android?
..."values-sp" directory (and maybe other fancy forms based on "sp" code). My testing device is under Android 4.0.4, it may be fixed by now, but that is far later than 1.5 where support is expected with ISO-639-1 (or even BCP-47 by the way).
– Alex
Feb 14 '17 at 8...
Purge Kafka Topic
...he topic:
bin/kafka-topics.sh --zookeeper localhost:2181 --delete --topic test
then re-create it:
bin/kafka-topics.sh --create --zookeeper localhost:2181 \
--replication-factor 1 --partitions 1 --topic test
share
...
Where does 'Hello world' come from?
...is was the original appearance of the program. The code was used for early testing of the C compiler and made its way into Kernighan and Ritchie's book. Later, it was one of the first programs used to test Bjarne Stroustrup's C++ compiler.
It became a standard for new programmers after it appeared ...
Using Spring MVC Test to unit test multipart POST request
.... I have verified that this works when I use e.g. cURL. Now I want to unit test the method with Spring MVC Test. I have tried to use the fileUploader, but I am not managing to get it working. Nor do I manage to add the JSON part.
...
Android OpenGL ES and 2D
...gs for 2D (sprite) rendering.
You should really take a look at SpriteMethodTest by the same author of replica island: http://code.google.com/p/apps-for-android/source/browse/trunk/SpriteMethodTest
See this question where I posted my own code: Using OpenGL to replace Canvas - Android
After you have...
How do I append one string to another in Python?
...'s only in the cPython implementation as far as I know. The same empirical testing on pypy or jython for example might show the older O(n**2) performance .
$ pypy -m timeit -s"s=''" "for i in xrange(10):s+='a'"
10000 loops, best of 3: 90.8 usec per loop
$ pypy -m timeit -s"s=''" "for i in xrange(1...
How to explicitly discard an out argument?
...ly the case with the TryParse (or TryWhatever) pattern, when it is used to test the validity of user input (e.g. can it be parsed as a number?) without caring about the actual parsed value.
You used the word "dispose" in the question, which I suspect was just unfortunate - but if the out parameter...
What's the most elegant way to cap a number to a segment? [closed]
..."Math" oriented approach ,but should also work , this way, the < / > test is exposed (maybe more understandable than minimaxing) but it really depends on what you mean by "readable"
function clamp(num, min, max) {
return num <= min ? min : num >= max ? max : num;
}
...