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How to sum array of numbers in Ruby?
...ittle bit more forgiving on what ends up in that array.
array.map(&:to_i).reduce(0, :+)
Some additional relevant reading:
http://ruby-doc.org/core-1.9.3/Enumerable.html#method-i-inject
http://en.wikipedia.org/wiki/MapReduce
http://en.wikipedia.org/wiki/Fold_(higher-order_function)
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How to check what user php is running as?
...
If available you can probe the current user account with posix_geteuid and then get the user name with posix_getpwuid.
$username = posix_getpwuid(posix_geteuid())['name'];
If you are running in safe mode however (which is often the case when exec is disabled), then it's unlikely tha...
Mysql: Select rows from a table that are not in another
... all join conditions manually:
SELECT a.*
FROM tbl_1 a
NATURAL LEFT JOIN tbl_2 b
WHERE b.FirstName IS NULL
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delete word after or around cursor in VIM
... what's the difference between dw and daw ?
– AK_
Mar 13 '17 at 17:00
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@AK_ Late response, ...
“unrecognized selector sent to instance” error in Objective-C
... exactly right. Was following the Stanford iOS class on iTunesU when this happened. Thanks again for your answer!
– Marshall Alsup
Jul 10 '12 at 7:11
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How to tell if a browser is in “quirks” mode?
...eally true? What are all the possible values?
– still_dreaming_1
Sep 16 '16 at 19:25
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Is it possible to specify the schema when connecting to postgres with JDBC?
...also set the user's default schema to your desired schema:
ALTER USER user_name SET search_path to 'schema'
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Is volatile expensive?
...rites can in fact be faster then with multiple processors. There are some applications that would in fact run faster concurrently with a single CPU then multiple.
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Best way to get identity of inserted row?
...situation, you want to use the OUTPUT clause. If you want something else, apply the effort to read and understand bdukes response.
– jerry
Feb 15 '12 at 15:48
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How can I show dots (“…”) in a span with hidden overflow?
...s? My width is not fixed, neither the max-width.
– Jp_
Sep 29 '16 at 13:20
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how can I expand thi...