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What does map(&:name) mean in Ruby?
...
It's shorthand for tags.map(&:name.to_proc).join(' ')
If foo is an object with a to_proc method, then you can pass it to a method as &foo, which will call foo.to_proc and use that as the method's block.
The Symbol#to_proc method was originally added by ActiveSupport but has be...
How do I disable the resizable property of a textarea?
... elements:
textarea {
resize: none;
}
To disable it for some (but not all) textareas, there are a couple of options.
To disable a specific textarea with the name attribute set to foo (i.e., <textarea name="foo"></textarea>):
textarea[name=foo] {
resize: none;
}
Or, using an id...
SetUnhandledExceptionFilter and the C/C++ Runtime Library - C/C++ - 清...
...unctionality by the means of the SetUnhandledExceptionFilter function.
Usually, the SetUndhandledExceptionFilter function is used in conjunction with the crash reporting activity. Having the ability of pinpointing the line of code which caused a crash is invaluable in post mortem debugging.
Post m...
Difference between clustered and nonclustered index [duplicate]
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You really need to keep two issues apart:
1) the primary key is a logical construct - one of the candidate keys that uniquely and reliably identifies every row in your table. This can be anything, really - an INT, a GUID, a string...
Vim: faster way to select blocks of text in visual mode
...elect from your current position to the next instance of "foo." If you actually wanted to expand to the next instance of "foo," on line 35, for example, just press n to expand selection to the next instance, and so on.
update
I don't often do it, but I know that some people use marks extensively to ...
'any' vs 'Object'
...ate an error telling you exactly that. If you use any instead you are basically telling the transpiler that anything goes, you are providing no information about what is stored in a - it can be anything! And therefore the transpiler will allow you to do whatever you want with something defined as an...
What is the difference between `let` and `var` in swift?
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C and C++ allows Unicode identifiers as well, via UCNs. If the compiler supports any Unicode source encoding then you can just use the Unicode characters directly. For example auto ???????? = "dogcow"; works in C++ for clang.
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Clear form field after select for jQuery UI Autocomplete
...it works around line 109 here.
The code in there checks for false specifically:
if ( false !== self._trigger( "select", event, { item: item } ) ) {
self.element.val( item.value );
}
share
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imp...
Sharing a URL with a query string on Twitter
...epending on the URL). Tweetdeck doesn't seem to handle twitter.com URLs at all.
– Pierre-Luc Paour
Oct 1 '12 at 14:47
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What's the point of 'const' in the Haskell Prelude?
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It's useful for passing to higher-order functions when you don't need all their flexibility. For example, the monadic sequence operator >> can be defined in terms of the monadic bind operator as
x >> y = x >>= const y
It's somewhat neater than using a lambda
x >> y =...