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Finding duplicate values in a SQL table
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How do I switch between the header and implementation file in Xcode 4?
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No connection string named 'MyEntities' could be found in the application config file
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How to get a Docker container's IP address from the host
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!WARNING! This doesn't work anymore. The new format is specific to the container and follows the form {{ .NetworkSettings.Networks.$network.IPAddress }}. The default appears to be bridge, but under docker-compose this will be a specific name that depends o...
How do I create a foreign key in SQL Server?
...able.
That might be the behaviour you want, but in my experience, it much more commonly isn't.
If you instead create it like this:
alter table MyTable
add constraint MyTable_MyColumn_FK FOREIGN KEY ( MyColumn )
references MyOtherTable(PKColumn)
on update cascade
on delete cascade
..then updat...
How to pick just one item from a generator?
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I should have been more clear. g.next() is g.__next__() in py3k. The builtin next(iterator) has been around since Python 2.6, and is what should be used in all new Python code, and it's trivial to backimplement if you need to support py <= 2...
Difference between \w and \b regular expression meta characters
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It's more correct to say that it's the boundary between a word character and not a word character because it also matches between a word character and the start or end of a string if that character is at the start/end of the strin...
How to remove selected commit log entries from a Git repository while keeping their changes?
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Manipulate a url string by adding GET parameters
...) {
$url .= '&category=1';
} else {
$url .= '?category=1';
}
More advanced
$url = 'http://example.com/search?keyword=test&category=1&tags[]=fun&tags[]=great';
$url_parts = parse_url($url);
// If URL doesn't have a query string.
if (isset($url_parts['query'])) { // Avoid '...
Import multiple csv files into pandas and concatenate into one DataFrame
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The same thing more concise, and perhaps faster as it doesn't use a list: df = pd.concat((pd.read_csv(f) for f in all_files)) Also, one should perhaps use os.path.join(path, "*.csv") instead of path + "/*.csv", which makes it OS independe...