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How to convert a ruby hash object to JSON?
...ndefined method `to_json' for {:make=>"bmw", :year=>"2003"}:Hash
# from (irb):11
# from /usr/bin/irb:12:in `<main>'
require 'json'
# => true
car.to_json
# => "{"make":"bmw","year":"2003"}"
As you can see, requiring json has magically brought method to_json to our Hash.
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What is eager loading?
... I could add that these terms are generally used (and maybe come from?) in the context of a ORM (Object Relational Mapper), where you map an object to a table in a relational database.
– Loki
Aug 19 '09 at 11:44
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C++ const map element access
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Does the C++ standard forbid the implementation from defining additional non-standard member functions in library classes?
– Tim Martin
Feb 27 '11 at 17:31
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Logging errors in ASP.NET MVC
...xceptions. The way I'm doing this is by having all my controllers inherit from a BaseController class. In the BaseController's OnActionExecuting event, I log any exceptions that may have occurred:
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What is the difference between “instantiated” and “initialized”?
...able is declared - MyClass myClassyReference
An object is instantiated (...from/of a given class, implied) - new MyClass()
The object is assigned to the variable. =.
Restating the facts:
A reference-type variable is also called simply "a reference". A "value-type variable" is not a reference.
Th...
How to get and set the current web page scroll position?
... thanks, I found this: articles.sitepoint.com/article/javascript-from-scratch/6 and modified the getScrollingPosition() to store the values in hidden variables. Then in the html of the refreshed page I use <body onLoad="window.scrollTo(x,y), where x and y are those from the hidden value...
How to fight tons of unresolved variables warning in Webstorm?
I have a function that takes a data from server:
6 Answers
6
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Navigation bar show/hide
...wo consecutive taps, perhaps with CACurrentMediaTime(). Or test the result from [touch tapCount].
If you get two taps, your subclassed view issues an NSNotification that your view controller has registered to listen for.
When your view controller hears the notification, it fires a selector that eith...
Is there a PHP function that can escape regex patterns before they are applied?
...he importance of the $delimiter argument, the description of that argument from the docs, a clarification for the confused about exactly what it means, and a heavily commented example showing preg_quote being used in the simplest case I could come up with where it's actually being used to programati...
Bash conditionals: how to “and” expressions? (if [ ! -z $VAR && -e $VAR ])
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From the bash manpage:
[[ expression ]] - return a status of 0 or 1 depending on the evaluation of the conditional expression expression.
And, for expressions, one of the options is:
expression1 && expressi...