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What is the difference between 0.0.0.0, 127.0.0.1 and localhost?
..." or local-only interface. This is a "fake" network adapter that can only communicate within the same host. It's often used when you want a network-capable application to only serve clients on the same host. A process that is listening on 127.0.0.1 for connections will only receive local connecti...
Clojure differences between Ref, Var, Agent, Atom, with examples
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I highly recommend "The Joy of Clojure" or "programming Clojure" for a real answer to this question, I can reproduce a short snip-it of the motivations for each:
start by watching this video on the notion of Identity and/or studying he...
What is the expected syntax for checking exception messages in MiniTest's assert_raises/must_raise?
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Why does the lock object have to be static?
It is very common to use a private static readonly object for locking in multi threading.
I understand that private reduces the entry points to the locking object by tightening the encapsulation and therefore access to the most essential.
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How can I ignore everything under a folder in Mercurial
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This answer, plus this documentation helped me: selenic.com/mercurial/hgignore.5.html
– CenterOrbit
Oct 4 '12 at 4:31
7
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How to delete from select in MySQL?
... edited May 23 '17 at 12:18
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111 silver badge
answered Dec 30 '10 at 13:02
BoltClock♦BoltClo...
Checking if output of a command contains a certain string in a shell script
I'm writing a shell script, and I'm trying to check if the output of a command contains a certain string. I'm thinking I probably have to use grep, but I'm not sure how. Does anyone know?
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Shallow copy of a Map in Java
...the clone() method just "because people expect it". He does NOT actually recommend using it at all.
I think the more interesting debate is whether a copy constructor is better than a copy factory, but that's a different discussion altogether.
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Animate scroll to ID on page load
... edited Mar 28 '13 at 7:29
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111 silver badge
answered Jul 13 '11 at 16:46
BumbleB2naBumbleB2n...
Get the value of an instance variable given its name
...ight thing to do is to make it an accessor. Consider the following:
class Computer
def new(cpus)
@cpus = cpus
end
end
In this case, if you did Computer.new, you would be forced to use instance_variable_get to get at @cpus. But if you're doing this, you probably mean for @cpus to be public...