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General suggestions for debugging in R
...g is to reproduce the problem...if you can't do that, then you need to get more information (e.g. with logging). Once you can reproduce it, you need to reduce it down to the source.
Rather than a "trick", I would say that I have a favorite debugging routine:
When an error occurs, the first thi...
How to handle more than 10 parameters in shell
I am using bash shell on linux and want to use more than 10 parameters in shell script
2 Answers
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Tags for Emacs: Relationship between etags, ebrowse, cscope, GNU Global and exuberant ctags
...question as I've recently read here, so I'll try explain the difference in more detail:
Point 1:
etags and ctags both generate an index (a.k.a. tag/TAGS) file of language objects found in source files that allows these items to be quickly and easily located by a text editor or other utility. A tag...
echo that outputs to stderr
...the same file: the one file descriptor #2 was originally referring to. For more information see the Bash Hackers Illustrated Redirection Tutorial.
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Getting started with Haskell
...o try is the haskell 99 problems page. These start off very basic, and get more difficult as you go on. It is very good practice doing a lot of those, as they let you practice your skills in recursion and higher order functions. I would recommend skipping any problems that require randomness as that...
What's the name for hyphen-separated case?
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Vertically centering a div inside another div [duplicate]
...pact your rendering performance so I would suggest that you use one of the more modern solutions.
Here is an example
Tested in:
FF3.5+
FF4+
Safari 5+
Chrome 11+
IE9+
HTML
<div class="cn"><div class="inner">your content</div></div>
CSS
.cn {
display: table-cel...
SimpleTest vs PHPunit
...only use the assertTrue() method in simpletest. Web-tests, of course, get more complicated, but they don't have to be excessively so.
– Kzqai
May 10 '12 at 17:09
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PHP parse/syntax errors; and how to solve them
...e culprit.
Read the line left to right and imagine what each symbol does.
More regularly you need to look at preceding lines as well.
In particular, missing ; semicolons are missing at the previous line ends/statement. (At least from the stylistic viewpoint. )
If { code blocks } are incorrectly c...
What does “S3 methods” mean in R?
...ly, the user of your newly created funky model fitting package, it is much more convenient to be able to type predict(myfit, type="class") than predict.mykindoffit(myfit, type="class").
There is quite a bit more to it, but this should get you started. There are quite a few disadvantages to this way...