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What does the exclamation mark mean in a Haskell declaration?
...his means:
data Foo = Foo Int Int !Int !(Maybe Int)
f = Foo (2+2) (3+3) (4+4) (Just (5+5))
The function f above, when evaluated, will return a "thunk": that is, the code to execute to figure out its value. At that point, a Foo doesn't even exist yet, just the code.
But at some point someone may...
Change working directory in my current shell context when running Node script
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4 Answers
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How do I determine height and scrolling position of window in jQuery?
...łakowski
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answered Nov 19 '08 at 23:24
Pim JagerPim Jager
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Check if a string contains a substring in SQL Server 2005, using a stored procedure
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CHARINDEX() searches for a substring within a larger string, and returns the position of the m...
How to change border color of textarea on :focus
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.input:focus {
outline: none !important;
border:1px solid red;
box-shadow: 0 0 10px...
Postgresql SELECT if string contains
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answered Apr 27 '14 at 8:18
Frans van BuulFrans van Buul
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SQL standard to escape column names?
...l Bourque
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answered May 25 '10 at 1:49
Dean HardingDean Harding
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Do event handlers stop garbage collection from occurring?
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Git: how to reverse-merge a commit?
...Ben James
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