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What does the “@” symbol mean in reference to lists in Haskell?
...the list's tail: pt
Without the @, you'd have to choose between (1) or (2):(3).
This syntax actually works for any constructor; if you have data Tree a = Tree a [Tree a], then t@(Tree _ kids) gives you access to both the tree and its children.
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How do I decode a string with escaped unicode?
...ble searching for it. How can I decode a string with unicode from http\u00253A\u00252F\u00252Fexample.com to http://example.com with JavaScript? I tried unescape , decodeURI , and decodeURIComponent so I guess the only thing left is string replace.
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How to add /usr/local/bin in $PATH on Mac
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edited Dec 10 '13 at 23:13
answered Jun 14 '12 at 2:47
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How to make pipes work with Runtime.exec()?
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answered May 8 '11 at 15:20
KajKaj
10.4k11 gold badge2929 silver badges2727 bronze badges
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Add column with number of days between dates in DataFrame pandas
...etime
Out[11]:
A datetime64[ns]
B datetime64[ns]
dtype: object
In [12]: df['A'] - df['B']
Out[12]:
one -58 days
two -26 days
dtype: timedelta64[ns]
In [13]: df['C'] = df['A'] - df['B']
In [14]: df
Out[14]:
A B C
one 2014-01-01 2014-02-28 -58 days
two 2014-02...
Why is it possible to recover from a StackOverflowError?
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edited Mar 2 '14 at 14:25
answered Mar 2 '14 at 13:59
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How can I check the size of a collection within a Django template?
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286
See https://docs.djangoproject.com/en/stable/ref/templates/builtins/#if : just use, to reprodu...
Using isKindOfClass with Swift
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answered Jun 14 '14 at 13:29
KPMKPM
10k33 gold badges4141 silver badges6363 bronze badges
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Locate the nginx.conf file my nginx is actually using
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249
Running nginx -t through your commandline will issue out a test and append the output with the...
“git pull” or “git merge” between master and development branches
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answered Feb 2 '11 at 16:17
Eric LeadsEric Leads
1,08211 gold badge77 silver badges22 bronze badges
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