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Java concurrency: Countdown latch vs Cyclic barrier
I was reading through the java.util.concurrent API , and found that
14 Answers
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How to write to a JSON file in the correct format
I am creating a hash in Ruby and want to write it to a JSON file, in the correct format.
4 Answers
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Show percent % instead of counts in charts of categorical variables
I'm plotting a categorical variable and instead of showing the counts for each category value.
8 Answers
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How to check if a variable is not null?
...n case for those wondering... This does not check for an empty string ("") and undefined. See my fiddle as reference: jsfiddle.net/b0tm7yaf
– Barrosy
Jan 18 '19 at 15:25
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How do I read configuration settings from Symfony2 config.yml?
...rod environments? So for testing I want the emails to send to a test email and production would get another email
– Phill Pafford
May 29 '12 at 17:07
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Differences between Perl and PHP [closed]
I'm planning to learn Perl 5 and as I have only used PHP until now, I wanted to know a bit about how the languages differ from each other.
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C compile error: “Variable-sized object may not be initialized”
...printf( "%d", boardAux[1][2] ) compiles fine. The compiler knows the sizes and knows in what position in memory the (1,2)-th element is. If you use dynamic allocation the array is uni-dimensional and you must perform the math yourself: printf("%d", boardAux[ 1*length + 2 ])
– D...
java.sql.SQLException: Incorrect string value: '\xF0\x9F\x91\xBD\xF0\x9F…'
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What you have is EXTRATERRESTRIAL ALIEN (U+1F47D) and BROKEN HEART (U+1F494) which
are not in the basic multilingual plane. They cannot be even represented in java as one char, "????????".length() == 4. They are definitely not null characters and one will see squares if you ...
What are all the valid self-closing elements in XHTML (as implemented by the major browsers)?
...nly) browsers to accept XHTML 1.0 documents by following the
guidelines, and serving them as text/html. Therefore, documents served as
text/html should be treated as HTML and not as XHTML.
It's a very common pitfall, because W3C Validator largely ignores that rule, but browsers follow it relig...
Convert unix time to readable date in pandas dataframe
I have a dataframe with unix times and prices in it. I want to convert the index column so that it shows in human readable dates.
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