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How to convert a ruby hash object to JSON?
...e how the object of an arbitrary class should be serialized to JSON. They did it for Hash and Array classes in json gem, but your class Person is just a plain Object. But you can inherit Hash instead. You can open a new question if you don't manage.
– Mladen Jablanović
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What is the relationship between the docker host OS and the container base image OS?
...rnel of the host, you will not have any specific kernel module/patches provided by the distribution.
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Docker: adding a file from a parent directory
... Dockerfile.
From the documentation:
The <src> path must be inside the context of the build; you
cannot ADD ../something/something, because the first step of a docker
build is to send the context directory (and subdirectories) to the
docker daemon.
EDIT: There's now an option (-f...
How to change highlighted occurrences color in Eclipse's sidebar?
... a little annoying that you can't have separate colors for text and the sidebar, but oh well
– matt b
Feb 9 '10 at 18:11
2
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@Basic(optional = false) vs @Column(nullable = false) in JPA
... those
properties should be evaluated in
memory by the Persistence Provider and
an exception raised before SQL is sent
to the database otherwise when using
'updatable=false' 'optional'
violations would never be reported.
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curl -GET and -X GET
... not happy with these default choices that curl does for you, you can override those request methods by specifying -X [WHATEVER]. This way you can for example send a DELETE by doing curl -X DELETE [URL].
It is thus pointless to do curl -X GET [URL] as GET would be used anyway. In the same vein it i...
find -exec cmd {} + vs | xargs
...g from a lot of non-Linux systems, so the portability argument isn't as valid. Using just -print and leaving the -0 off of xargs, however, is very portable.
– dannysauer
May 27 '09 at 20:30
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Using numpad in Vi (Vim) via PuTTY
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled...
Why would one declare a Java interface method as abstract?
...rfaces is obsolete and should no longer be used. (Section 9.1.1.1)
That said, with Java's propensity for backwards compatibility, I really doubt it will ever make a difference whether the abstract keyword is present.
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When does Java's Thread.sleep throw InterruptedException?
... catch InterruptedException
but cannot rethrow it, you should preserve evidence that the
interruption occurred so that code higher up on the call stack can
learn of the interruption and respond to it if it wants to. This task
is accomplished by calling interrupt() to "reinterrupt" the curren...