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What does the regular expression /_/g mean?
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The regex matches the _ character.
The g means Global, and causes the replace call to replace all matches, not just the first one.
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Evaluate if list is empty JSTL
...nctions" prefix="fn" %>
<c:if test="${fn:length(list) > 0}">
And here's the tag documentation.
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Does file_get_contents() have a timeout setting?
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default_socket_timeout, stream_set_timeout, and stream_context_create timeout are all the timeout of every line read/write, not the whole connection timeout.
– diyism
Nov 4 '14 at 8:27
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Calling static generic methods
...nt of type Class<E> (so it would be createFoo(Class<E> type)), and call it with createFoo(String.class)
– Gavin S. Yancey
Apr 16 '15 at 2:24
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Rounding BigDecimal to *always* have two decimal places
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Why does setScale(...) work? see BigDecimal setScale and round.
– Jason Law
Nov 26 '19 at 9:53
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How to do a safe join pathname in ruby?
My Rails development environment is Windows-based, and my production environment is Linux-based.
2 Answers
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How do I change column default value in PostgreSQL?
...able name, only that table is altered. If ONLY is not specified, the table and all its descendant tables (if any) are altered" postgresql.org/docs/9.3/static/sql-altertable.html
– Yodan Tauber
Dec 20 '15 at 8:41
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Scala: join an iterable of strings
...Strings.mkString(",")
A variant exists in which you can specify a prefix and suffix too.
See here for an implementation using foldLeft, which is much more verbose, but perhaps worth looking at for education's sake.
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How to drop multiple columns in postgresql
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You can even leave out 'COLUMN' and use ALTER TABLE table DROP col1, DROP col2;
– Ondrej Burkert
Sep 11 '15 at 10:45
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How to break out of a loop in Bash?
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if [ "$done" -ne 0 ]; then
break
fi
done
: is the no-op command; its exit status is always 0, so the loop runs until done is given a non-zero value.
There are many ways you could set and test the value of done in order to exit the loop; the one I show above should work in any POSIX...