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Using Rails serialize to save hash to database
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add_column :users, :multi_wrong, :text
end
Then Rails will properly convert it into YAML for you (and perform proper serialization). Strings fields are limited in size and will only hold especially-small values.
share...
What is the Java ?: operator called and what does it do?
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Yes, it is a shorthand form of
int count;
if (isHere)
count = getHereCount(index);
else
count = getAwayCount(index);
It's called the conditional operator. Many people (erroneously) call it the ternary operator, because it's the only te...
Javascript: How to detect if browser window is scrolled to bottom?
... if any, versions of IE support window.scrollY.
– Batandwa
Oct 27 '14 at 11:33
3
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Reverse Range in Swift
...in Objective-C) that migrated to Swift C-style for loops and now had to be converted because C-style for loops are going away. This was simply terrifying, because these loops represented the core of my app's logic, and rewriting everything risked breakage. Thus I wanted a notation that would make th...
What's the best way to check if a file exists in C?
...exists
} else {
// file doesn't exist
}
You can also use R_OK, W_OK, and X_OK in place of F_OK to check for read permission, write permission, and execute permission (respectively) rather than existence, and you can OR any of them together (i.e. check for both read and write permission using R...
Ruby on Rails. How do I use the Active Record .build method in a :belongs to relationship?
... method missing for your find_by_email and find_by_column_name methods. It converts the method you pass to a string and dissects it and tries to match it with your table's column names.
– bigpotato
Oct 16 '13 at 17:57
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Implementing two interfaces in a class with same method. Which interface method is overridden?
Two interfaces with same method names and signatures. But implemented by a single class then how the compiler will identify the which method is for which interface?
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Explain the encapsulated anonymous function syntax
...to observe, because most ways of attempting to get the returned value will convert the function declaration to a function expression. However, eval shows it:
var r = eval("function f(){}");
console.log(r); // undefined
Calling an empty completion record makes no sense. That's why functi...
How do I decode a URL parameter using C#?
...that contain a space use '+' but UnescapeDataString intentionally doesn't convert those to spaces). Uri handles more than just URL, as the question is asking about URL we should use HttpUtility.UrlDecode
– Lorenz03Tx
Aug 4 '17 at 21:37
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Why is the standard session lifetime 24 minutes (1440 seconds)?
...e lifetime was specified in seconds.
I'll bet someone just never bothered converting minutes to seconds. It's probable that person was Sascha Schumann. Once that value was coded into the Zend engine, it became the configuration (php.ini) default as well.
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