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How do you write a migration to rename an ActiveRecord model and its table in Rails?
...g column renames.
When grepping, remember to search for singular, plural, capitalized,
lowercase, and even UPPERCASE (which may occur in comments) versions
of your strings.
It's best to search for plural versions first, then singular. That
way if you have an irregular plural - such as in my merchant...
dispatch_after - GCD in Swift?
...ey've improved the calling syntax:
func delay(_ delay:Double, closure:@escaping ()->()) {
let when = DispatchTime.now() + delay
DispatchQueue.main.asyncAfter(deadline: when, execute: closure)
}
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Count, size, length…too many choices in Ruby?
... my code will generate a request to a database (or external service via an API) I use .count.
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ValidateAntiForgeryToken purpose, explanation and example
... CSRF are entirely different. CORS is for allowing other domains to access APIs on your server, CSRF is about making sure that a form post came from the page you expected it to.
– Richard Szalay
Jun 14 '17 at 11:56
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Using mixins vs components for code reuse in Facebook React
...inheritance).
Mixins are also often used in frameworks, to make framework API available to all the components, by using the "hidden" context feature of React. This won't be needed anymore either with ES6 class inheritance.
Most of the other times, mixins are used, but are not really needed and c...
JavaScript curry: what are the practical applications?
... timing stuff, its generally easier for the customer to release, as public API some function like "slideUp", "fadeIn" that takes only elements as arguments, and that are just some curried function returning the high order function with the default "animation function" built-in.
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Base64 length calculation?
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Does not work as an input for window's API CryptBinaryToStringA.
– TarmoPikaro
May 4 '16 at 6:54
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How to redirect 'print' output to a file using python?
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Python 2 or Python 3 API reference:
print(*objects, sep=' ', end='\n', file=sys.stdout, flush=False)
The file argument must be an object with a write(string) method; if it is not present or None, sys.stdout will be used. Since printed arguments ...
JavaScript DOM remove element
...long as you don't care about IE. See: developer.mozilla.org/en-US/docs/Web/API/ChildNode/remove
– nevf
May 31 '17 at 21:37
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What is the most efficient way to create HTML elements using jQuery?
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@MarcStober No offense taken. It's still here: http://api.jquery.com/jQuery/#jQuery2. The docs mention optional closing tag or quick-closing
– metatron
Feb 23 '15 at 9:14
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