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Best way to iterate through a Perl array
... you'll find #1 and #4 to be slightly faster because the iteration work is done in C instead of Perl, and no needless copying of the array elements occurs. ($_ is aliased to the element in #1, but #2 and #3 actually copy the scalars from the array.)
#5 might be similar.
In terms memory usage: They'...
Center image horizontally within a div
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I don't think this is a good idea, and also I believe there's some caveats like margin: auto is dependent on the containing element having a designated width value.
– Jared Farrish
Jun 12 ...
insert multiple rows via a php array into mysql
...VALUES '.implode(',', $sql));
The advantage of this approach is that you don't copy and re-copy the SQL statement you've so far assembled with each concatenation; instead, PHP does this once in the implode() statement. This is a big win.
If you have lots of columns to put together, and one or mor...
What does it mean: The serializable class does not declare a static final serialVersionUID field? [d
...erstand and remove it. I found already some answers on this question but I do not understand these answers because of an overload with technical terms. Is it possible to explain this issue with simple words?
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How to detect the current OS from Gradle
I found this answer about how to do it with Groovy:
6 Answers
6
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My docker container has no internet
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First thing to check is run cat /etc/resolv.conf in the docker container. If it has an invalid DNS server, such as nameserver 127.0.x.x, then the container will not be able to resolve the domain names into ip addresses, so ping google.com will fail.
Second thing to check is run c...
npm windows install globally results in npm ERR! extraneous
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hi! Thanks for the answer. Does this mean also, that I acutally should be able to execute the "jshint", correct?
– Meru
Mar 25 '14 at 21:26
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Appending an element to the end of a list in Scala
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That's because you shouldn't do it (at least with an immutable list).
If you really really need to append an element to the end of a data structure and this data structure really really needs to be a list and this list really really has to be immutable t...
Difference between GIT and CVS
...s of this is that it is very easy in Git to revert (create a change that undoes) or undo whole change; other consequence is that in CVS is easy to do partial checkouts, while it is currently next to impossible in Git. The fact that changes are per-file, grouped together led to invention of GNU Chang...
在 App Inventor 2 中使用图像 · App Inventor 2 中文网
...sive sizing
In summary: What MIT App Inventor Programmers Should Do
Synopsis: App Inventor works best if you use images whose size matches the size you want them to appear on your screen. If you import larger images into your app, your app may run out of system memory.
1. Out of memo...