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With MySQL, how can I generate a column containing the record index in a table?
...l l
JOIN (SELECT @curRow := 0) r;
The JOIN (SELECT @curRow := 0) part allows the variable initialization without requiring a separate SET command.
Test case:
CREATE TABLE league_girl (position int, username varchar(10), score int);
INSERT INTO league_girl VALUES (1, 'a', 10);
INSERT INTO leag...
How to escape os.system() calls?
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Something similar to this is now officially available as shlex.quote.
– Janus Troelsen
Jun 16 '12 at 21:17
3
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If a folder does not exist, create it
...ut, you don't need to check if it exists first. From the docs
Any and all directories specified in path are created, unless they already exist or unless some part of path is invalid. If the directory already exists, this method does not create a new directory, but it returns a DirectoryInfo obj...
How do I cast a JSON object to a typescript class
I read a JSON object from a remote REST server. This JSON object has all the properties of a typescript class (by design). How do I cast that received JSON object to a type var?
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How to swap the buffers in 2 windows emacs
...fer-move for this. Now if you are working on the buffer on the left side, calling 'buf-move-right' will swap it with the one on the right. I guess this is what you want.
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I didn't find “ZipFile” class in the “System.IO.Compression” namespace
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or install it through NuGet
– northben
Jan 16 '14 at 2:41
2
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How do I convert dates in a Pandas data frame to a 'date' data type?
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Essentially equivalent to @waitingkuo, but I would use to_datetime here (it seems a little cleaner, and offers some additional functionality e.g. dayfirst):
In [11]: df
Out[11]:
a time
0 1 2013-01-01
1 2 2013-01-02
2 ...
What is a “bundle” in an Android application
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Bundles are generally used for passing data between various Android activities. It depends on you what type of values you want to pass, but bundles can hold all types of values and pass them to the new activity.
You can use it like this:
In...
Fastest method to escape HTML tags as HTML entities?
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You could try passing a callback function to perform the replacement:
var tagsToReplace = {
'&': '&',
'<': '&lt;',
'>': '&gt;'
};
function replaceTag(tag) {
return tagsToReplace[tag] || tag;
}
function saf...
Should I size a textarea with CSS width / height or HTML cols / rows attributes?
...r arbitrary space you are setting the size with is going to waste and is really just for show.
– Explosion Pills
Oct 9 '10 at 8:27
4
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