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What does the exclamation mark mean in a Haskell declaration?
... just what this 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...
Ignore modified (but not committed) files in git?
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277
check out the git-update-index man page and the --assume-unchanged bit and related.
when I ha...
How to check if anonymous object has a method?
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282
typeof myObj.prop2 === 'function'; will let you know if the function is defined.
if(typeof my...
Python, remove all non-alphabet chars from string
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123
Use re.sub
import re
regex = re.compile('[^a-zA-Z]')
#First parameter is the replacement, sec...
Use StringFormat to add a string to a WPF XAML binding
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220
Your first example is effectively what you need:
<TextBlock Text="{Binding CelsiusTemp, St...
How to negate the whole regex?
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102
Use negative lookaround: (?!pattern)
Positive lookarounds can be used to assert that a pattern ...
Java packages com and org
...are meant to use the companies DNS name:
com.sun.eng
com.apple.quicktime.v2
edu.cmu.cs.bovik.cheese
You will also see edu. and net. packages out in the wild as well, although they are less common.
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JS: Check if date is less than 1 hour ago?
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answered Feb 10 '12 at 8:25
Mike SamuelMike Samuel
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What is the most efficient/elegant way to parse a flat table into a tree?
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462
Now that MySQL 8.0 supports recursive queries, we can say that all popular SQL databases support...
How to provide different Android app icons for different gradle buildTypes?
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162
Figured it out. What you need to do is create a separate src folder called debug that holds the ...