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Docker build “Could not resolve 'archive.ubuntu.com'” apt-get fails to install anything
...
}
Exit from root:
# exit
Now restart docker:
$ sudo service docker restart
VERIFICATION:
Now check that adding the /etc/docker/daemon.json file allows you to resolve 'google.com' into an IP address:
$ docker run --rm busybox...
Java - JPA - @Version annotation
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Although @Pascal answer is perfectly valid, from my experience I find the code below helpful to accomplish optimistic locking:
@Entity
public class MyEntity implements Serializable {
// ...
@Version
@Column(name = "optlock", columnDefinition = "intege...
What does '
...ach($tokens as $token){
echo token_name((int) $token[0]), PHP_EOL;
}
From the List of Parser Tokens, here is what T_OPEN_TAG_WITH_ECHO links to.
share
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improve this answer
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How can I get zoom functionality for images?
... This is great stuff, been looking for this for ages. Do use the code from github as it is more recent and just works better
– Alex
Jul 16 '12 at 18:20
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Current time in microseconds in java
...at ability.
It does have System.nanoTime(), but that just gives an offset from some previously known time. So whilst you can't take the absolute number from this, you can use it to measure nanosecond (or higher) precision.
Note that the JavaDoc says that whilst this provides nanosecond precision, ...
If strings are immutable in .NET, then why does Substring take O(n) time?
...(n) is O(1) if n does not grow large. Most people extract tiny substrings from tiny strings, so how the complexity grows asymptotically is completely irrelevant.
The long answer is:
An immutable data structure built such that operations on an instance permit re-use of the memory of the original w...
Python unittest - opposite of assertRaises?
... @Shay, IMO you should always exclude the test files themselves from the coverage reports (as they almost always run 100% by definition, you would be artificially inflating the reports)
– Original BBQ Sauce
Oct 16 '19 at 10:55
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Scatterplot with marginal histograms in ggplot2
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You're right. They're sampled from the same distribution though, so the marginal histograms should theoretically match the scatter plot.
– oeo4b
Dec 17 '11 at 17:03
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What is a regular expression for a MAC Address?
... As an aside, the quote above concerning "standard format" comes from Wikipedia, not the 802.3 standards body. IEEE 802-2014 actually specifies hyphens for ordinary MAC addresses (§ 8.1 ¶ 3) and colons for the obsolescent bit-reversed notation (¶ 4). Importantly, in practice, no one o...
How can I strip all punctuation from a string in JavaScript using regex?
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If you want to remove specific punctuation from a string, it will probably be best to explicitly remove exactly what you want like
replace(/[.,\/#!$%\^&\*;:{}=\-_`~()]/g,"")
Doing the above still doesn't return the string as you have specified it. If you want t...