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Iterating through a list in reverse order in java
...ards. I'm going to use this approach and use the ReverseListIterator class from Apache Commons Collections.
– David Groomes
Jul 21 '14 at 3:23
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How can I initialise a static Map?
... Double brace initialization can cause memory leaks when used from a non-static context, because the anonymous class created will maintain a reference to the surrounding object. It has worse performance than regular initialization because of the additional class loading required. It can...
Check whether variable is number or string in JavaScript
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From the perspective of someone who has to maintain code, choosing this path could be confusing. "Why did they use substring and not pass any values? What business logic am I missing here?" At the very least, this needs to be...
Add and remove multiple classes in jQuery
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so what is you want to remove a class from multiple $("p")?
– whisk
Jun 17 '19 at 15:47
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How to determine the first and last iteration in a foreach loop?
... I don't think you should issue reset($array) inside a foreach. From the official documentation (www.php.net/foreach): "As foreach relies on the internal array pointer changing it within the loop may lead to unexpected behavior." And reset does precisely that (www.php.net/reset): "Set t...
JavaScript by reference vs. by value [duplicate]
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coming from c, this is stupid and annoying, state state state...
– Rafael
Apr 27 '16 at 13:51
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Representing null in JSON
...ber is that the empty string and the number zero are conceptually distinct from null.
In the case of a count you probably always want some valid number (unless the count is unknown or undefined), but in the case of strings, who knows? The empty string could mean something in your application. Or m...
Boolean literals in PowerShell
...echo "Batch file starting execution."
Now if I've to invoke this PS file from a PS command line, this is how I can do it:
installmyapp.ps1 -cleanuprequired $true
OR
installmyapp.ps1 -cleanuprequired 1
Here 1 and $true are equivalent. Also, 0 and $false are equivalent.
Note: Never expect t...
How to kill a child process after a given timeout in Bash?
...a bash script that launches a child process that crashes (actually, hangs) from time to time and with no apparent reason (closed source, so there isn't much I can do about it). As a result, I would like to be able to launch this process for a given amount of time, and kill it if it did not return su...
How do I use sudo to redirect output to a location I don't have permission to write to?
.../test.out > /dev/null
The redirect to /dev/null is needed to stop tee from outputting to the screen. To append instead of overwriting the output file
(>>), use tee -a or tee --append (the last one is specific to GNU coreutils).
Thanks go to Jd, Adam J. Forster and Johnathan for the sec...