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When to throw an exception?
...e 1: say I have a function which is supposed to examine an arbitrary class and return true if that class inherits from List<>. This function asks the question, "Is this object a descendant of List?" This function should never throw an exception, because there are no gray areas in its operation...
How can I convert a string to boolean in JavaScript?
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I follow Crockford's advice and use === and !== whenever it makes sense, which is almost always.
– guinaps
Feb 10 '11 at 15:37
56
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What is an example of the simplest possible Socket.io example?
So, I have been trying to understand Socket.io lately, but I am not a supergreat programmer, and almost every example I can find on the web (believe me I have looked for hours and hours), has extra stuff that complicates things. A lot of the examples do a bunch of things that confuse me, or connect ...
Using emit vs calling a signal as if it's a regular function in Qt
...:foo()
{
QMetaObject::activate(this, &staticMetaObject, 0, 0);
}
And the code emit foo(); is pre-processed to simply foo();
emit is defined in Qt/qobjectdefs.h (in the open-source flavor of the source anyway), like this:
#ifndef QT_NO_EMIT
# define emit
#endif
(The define guard is to a...
How to fix the uninitialized constant Rake::DSL problem on Heroku?
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Thank you. That fixed my problems and I didn't know what was going on. (Using the rails installer on windows and deploying to heroku, as a complete beginner.)
– Jack V.
Jun 14 '11 at 22:46
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Javascript swap array elements
...lizing the temporary variable approach as it's cross-language (e.g. C/C++) and the first approach that usually pops into my mind.
– Ultimater
Aug 15 '18 at 7:22
3
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What is the difference between Unidirectional and Bidirectional JPA and Hibernate associations?
What is the difference between Unidirectional and Bidirectional associations?
4 Answers
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How to prevent browser page caching in Rails
...e.headers["Expires"] = "Mon, 01 Jan 1990 00:00:00 GMT"
end
end
Rails 4 and older versions:
class ApplicationController < ActionController::Base
before_filter :set_cache_headers
private
def set_cache_headers
response.headers["Cache-Control"] = "no-cache, no-store"
response.he...
Resharper Alt Enter not working
... edited Aug 16 '17 at 10:20
Andrii Omelchenko
11.4k77 gold badges3636 silver badges6969 bronze badges
answered Oct 20 '09 at 18:11
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Android Spanned, SpannedString, Spannable, SpannableString and CharSequence
Android offers a variety of interfaces all related to text and strings:
Spanned , SpannedString , Spannable , SpannableString and CharSequence .
...