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Why can't I use Docker CMD multiple times to run multiple services?
I have built a base image from Dockerfile named centos+ssh. In centos+ssh's Dockerfile, I use CMD to run ssh service.
5 Ans...
What is the difference between Raising Exceptions vs Throwing Exceptions in Ruby?
Ruby has two different exceptions mechanisms: Throw/Catch and Raise/Rescue.
3 Answers
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Scala: List[Future] to Future[List] disregarding failed futures
... an arbitrary length list of Futures to a Future of List. I'm using Playframework, so ultimately, what I really want is a Future[Result] , but to make things simpler, let's just say Future[List[Int]] The normal way to do this would be to use Future.sequence(...) but there's a twist... The list ...
What exactly does Perl's “bless” do?
I understand one uses the "bless" keyword in Perl inside a class's "new" method:
8 Answers
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What is the difference between javac and the Eclipse compiler?
Is Eclipse's Java compiler just a wrapper around the same core that the javac program is wrapped around, or is it a separate compiler altogether? If the latter, why would they reinvent the wheel?
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Is there an easy way to check the .NET Framework version?
The problem is that I need to know if it's version 3.5 SP 1. Environment.Version() only returns 2.0.50727.3053 .
21 Answ...
ReadOnlyCollection or IEnumerable for exposing member collections?
...o expose an internal collection as a ReadOnlyCollection rather than an IEnumerable if the calling code only iterates over the collection?
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CSS display:table-row does not expand when width is set to 100%
...00%">
<td>Type</td>
<td style="float:right">Name</td>
</tr>
Where's the table in the above? You can't just have a row out of nowhere (tr must be contained in either table, thead, tbody, etc.)
Instead, add an outer element with display:table, put the 100% w...
Getting an element from a Set
Why doesn't Set provide an operation to get an element that equals another element?
24 Answers
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PostgreSQL return result set as JSON array?
... arrays is absolutely required to ensure that the object has the desired names.
Which one is clearer is a matter of opinion. If using the json_build_object function, I highly recommend putting one key/value pair on a line to improve readability.
You could also use array_agg in place of json_agg, b...