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Which is better, number(x) or parseFloat(x)?
...hat a lot of the internal JavaScript functions use Number as well). If someone types '1x' I prefer to show an error rather than treat it as if they had typed '1'. The only time I really make an exception is when I am converting a style to a number, in which case parseFloat is helpful because styles ...
Calling shell functions with xargs
...ouble. To avoid messy nesting , use double quote (expand args on the other one)
$ echo '$(date)' | xargs -0 -L1 -I {} bash -c 'printit "{}"'
Fri 11 Sep 17:02:24 BST 2020
$ echo '$(date)' | xargs -0 -L1 -I {} bash -c "printit '{}'"
$(date)
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IntelliJ and Tomcat…changed files are not automatically recognized by Tomcat
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This cannot be done if you deploy a war with IntelliJ IDEA. However, it can be if you deploy an exploded war. In IDEA:
open your Tomcat Run/Debug configuration (Run > Edit Configurations)
Go to the "Deployment" tab
In the "Deploy at Ser...
REST API - why use PUT DELETE POST GET?
...T and DELETE, which can't have side effects and are therefore less error prone/easier to control.
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__FILE__, __LINE__, and __FUNCTION__ usage in C++
...ul to mention it since you asked about the usage of __LINE__ and __FILE__. One never gets enough surprises out of C++ :)
Edit: @Jonathan Leffler provides some more good use-cases in the comments:
Messing with #line is very useful for pre-processors that want to keep errors reported in the user'...
Edit the root commit in Git?
...commits, knowing that once I reach some usable state, I'd squash them into one for instance, and reword the message. Anyway, now I changed my mind and I think the absolutely most useful thing for the first commit would be putting .gitattributes file instead of doing an empty commit.
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Why `null >= 0 && null
...The last result states that "null is greater than or equal to zero", so in one of the comparisons above it must be true, but they are both false.
The reason is that an equality check == and comparisons > < >= <= work differently. Comparisons convert null to a number, treating it as 0. T...
Why is HttpClient BaseAddress not working?
... to the GetAsync method -- or whichever other method of HttpClient -- only one permutation works. You must place a slash at the end of the BaseAddress, and you must not place a slash at the beginning of your relative URI, as in the following example.
using (var handler = new HttpClientHandler())
u...
Rails params explained?
Could anyone explain params in Rails controller: where they come from, and what they are referencing?
5 Answers
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How is it possible to declare nothing inside main() in C++ and yet have a working application after
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I know some examples like that you tell. One way to get it is using the template metaprogramming. Using it you can move some compute process to the compilation.
Here you can get an example with the Fibonacci numbers
If you use it in a static class constructor and ...