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How does Haskell printf work?
...a where
bar :: IO () -> a
instance FooType (IO ()) where
bar = id
instance (Show x, FooType r) => FooType (x -> r) where
bar s x = bar (s >> print x)
Here, bar takes an IO action which is built up recursively until there are no more arguments, at which point we simply ...
Ruby on Rails Callback, what is difference between :before_save and :before_create?
...reate Ruby on Rails callbacks are, and what they have to do with Rails validations? Does validation occur after :before_save or :before_create ?
...
Uploading both data and files in one form using Ajax?
...
The problem I had was using the wrong jQuery identifier.
You can upload data and files with one form using ajax.
PHP + HTML
<?php
print_r($_POST);
print_r($_FILES);
?>
<form id="data" method="post" enctype="multipart/form-data">
<input type="text...
LINQ Ring: Any() vs Contains() for Huge Collections
...s will use IEquatable<T> or the Equals() method, which might be overridden.
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XML attribute vs XML element
...umb:
An Attribute is something that is self-contained, i.e., a color, an ID, a name.
An Element is something that does or could have attributes of its own or contain other elements.
So yours is close. I would have done something like:
EDIT: Updated the original example based on feedback below.
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Proper use of 'yield return'
...ose keywords in C# that continues to mystify me, and I've never been confident that I'm using it correctly.
16 Answers
...
Inline SVG in CSS
... url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='10' height='10'><linearGradient id='gradient'><stop offset='10%' stop-color='%23F00'/><stop offset='90%' stop-color='%23fcc'/> </linearGradient><rect fill='url(%23gradient)' x='0' y='0' wid...
How can I pretty-print JSON using node.js?
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In latest nodejs you need to provide a callback function as third parameter, see this answer: stackoverflow.com/a/11677276/675065
– Alp
Apr 23 at 7:30
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How to get sp_executesql result into a variable?
...ELECT @tablename = N'products'
SELECT @sSQL = N'SELECT @retvalOUT = MAX(ID) FROM ' + @tablename;
SET @ParmDefinition = N'@retvalOUT int OUTPUT';
EXEC sp_executesql @sSQL, @ParmDefinition, @retvalOUT=@retval OUTPUT;
SELECT @retval;
But if you don't, and can not modify the SP:
-- Assuming th...
How do I prevent Android taking a screenshot when my app goes to the background?
...AG_SECURE:
public class FlagSecureTestActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE,
WindowManager.LayoutParams.FLAG_SECURE...