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Scala list concatenation, ::: vs ++
...ourse, Scala evolved other collections, in an ad-hoc manner. When 2.8 came out, the collections were redesigned for maximum code reuse and consistent API, so that you can use ++ to concatenate any two collections -- and even iterators. List, however, got to keep its original operators, aside from on...
.htaccess: Invalid command 'RewriteEngine', perhaps misspelled or defined by a module not included i
... find and make sure that the line AddModule mod_rewrite.c is not commented out.
If the LoadModule rewrite_module modules/mod_rewrite.so line is missing from the httpd.conf file entirely, just add it.
Sample command
To enable the module in a standard ubuntu do this:
a2enmod rewrite
systemctl restart...
Frequency table for a single variable
...ts().sort_index(1) , to prevent the first column possibly getting slightly out-of-order
– smci
Apr 17 '13 at 12:12
...
Why can't non-default arguments follow default arguments?
...alls.
Keyword arguments calling prove useful for being able to provide for out-of-order positional arguments, but, coupled with default arguments, they can also be used to "skip over" missing arguments as well.
share
...
Downloading a large file using curl
...$ch = curl_init(str_replace(" ","%20",$url));
curl_setopt($ch, CURLOPT_TIMEOUT, 50);
// write curl response to file
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
// get curl response
curl_exec($ch);
curl_close($ch);
fclose($fp);
?>
...
How to rsync only a specific list of files?
I've about 50 or so files in various sub-directories that I'd like to push to a remote server. I figured rsync would be able to do this for me using the --include-from option. Without the --exclude="*" option, all the files in the directory are being synced, with the option, no files are.
...
The difference between try/catch/throw and try/catch(e)/throw e
...uld be disastrous for someone reading exception logs as he will never find out the original cause of the exception.
The second approach might be useful when you want to add additional information to the stack trace but it is used like this:
try
{
// do something
}
catch (Exception ex)
{
th...
How does zip(*[iter(s)]*n) work in Python?
...]*3)) # note: not an iter here, the lists are not emptied as we iterate
# output
[(0, 0, 0), (1, 1, 1), (2, 2, 2), (3, 3, 3), (4, 4, 4), (5, 5, 5), (6, 6, 6), (7, 7, 7), (8, 8, 8)]
Using iterator, pops the values and only keeps remaining available, so for zip once 0 is consumed 1 is available an...
Regex lookahead for 'not followed by' in grep
...: grep -P '^.*contains((?!but_not_this).)*$' *.log.* >"D:\temp\result.out"
– wangf
May 29 '15 at 2:47
...
How do I ignore the initial load when watching model changes in AngularJS?
...scope.$watch('fieldcontainer', function() {
if (initializing) {
$timeout(function() { initializing = false; });
} else {
// do whatever you were going to do
}
});
The flag will be tear down just at the end of the current digest cycle, so next change won't be blocked.
...