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Import multiple csv files into pandas and concatenate into one DataFrame
...d several csv files from a directory into pandas and concatenate them into one big DataFrame. I have not been able to figure it out though. Here is what I have so far:
...
Is it feasible to do (serious) web development in Lisp? [closed]
...lication in almost any programming language, especially in such a powerful one as Lisp (be it Scheme or Common Lisp). But is it practical to use it for web development? If so, what should be a good starting point? Where can be found the proper resources (tools, libraries, documentation, best practic...
lexers vs parsers
...l 3, not level 2), but that doesn't matter for the output data and for the one which reads them.
Parsers produce syntax trees, which are representations of sentences of the context-free language they recognize. Usually it's only one big tree for the whole document/source file, because the whole docu...
“[notice] child pid XXXX exit signal Segmentation fault (11)” in apache error.log [closed]
...
Attach gdb to one of the httpd child processes and reload or continue working and wait for a crash and then look at the backtrace. Do something like this:
$ ps -ef|grep httpd
0 681 1 0 10:38pm ?? 0:00.45 /Applications/MA...
What is so bad about singletons? [closed]
...
Singletons solve one (and only one) problem.
Resource Contention.
If you have some resource that
(1) can only have a single instance, and
(2) you need to manage that single instance,
you need a singleton.
There aren't many examples. ...
Why is there no multiple inheritance in Java, but implementing multiple interfaces is allowed?
...ifferent ways of doing the same thing, and the subclass can't choose which one to pick.
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How to document thrown exceptions in c#/.net
... bit big, you might want to create your own exception type. Catch all the ones you might encounter within your method, wrap them in your exception, and throw that.
Another place you might want to do it this way is if your method is on the face of your API. Just like a facade simplifies multiple i...
Bash continuation lines
...ntinuation lines
If this creates two arguments to echo and you only want one, then let's look at string concatenation. In bash, placing two strings next to each other concatenate:
$ echo "continuation""lines"
continuationlines
So a continuation line without an indent is one way to break up a s...
Click outside menu to close in jquery
...lick occurs on your page. To avoid that, you can add the listener for just one time :
$('a#menu-link').on('click', function(e) {
e.preventDefault();
e.stopPropagation();
$('#menu').toggleClass('open');
$(document).one('click', function closeMenu (e){
if($('#menu').has(e.ta...
How to show only next line after the matched one?
...'blah' and the next line that follows in the logfile. It might be a simple one but I can't find a way to omit the line that has 'blah' and only show next line in the output.
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