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How do I delete rows in a data frame?
...
The key idea is you form a set of the rows you want to remove, and keep the complement of that set.
In R, the complement of a set is given by the '-' operator.
So, assuming the data.frame is called myData:
myData[-c(2, 4, 6), ] ...
How to sign an android apk file
...stuck with after you work through it, I'd suggest:
https://developer.android.com/studio/publish/app-signing.html
Okay, a small overview without reference or eclipse around, so leave some space for errors, but it works like this
Open your project in eclipse
Press right-mouse - > tools (android...
Get Insert Statement for existing row in MySQL
...tion.
mysqldump -t -u MyUserName -pMyPassword MyDatabase MyTable --where="ID = 10"
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SQL Server: Difference between PARTITION BY and GROUP BY
...fferent places. group by modifies the entire query, like:
select customerId, count(*) as orderCount
from Orders
group by customerId
But partition by just works on a window function, like row_number:
select row_number() over (partition by customerId order by orderId)
as OrderNumberForThisCus...
Making a property deserialize but not serialize with json.net
...es, but stopped it from serializing them.
– Daniel Saidi
Jun 23 '16 at 8:14
7
In conjunction with...
How to tell if browser/tab is active [duplicate]
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You would use the focus and blur events of the window:
var interval_id;
$(window).focus(function() {
if (!interval_id)
interval_id = setInterval(hard_work, 1000);
});
$(window).blur(function() {
clearInterval(interval_id);
interval_id = 0;
});
To Answer the Commented ...
How to keep onItemSelected from firing off on a newly instantiated Spinner?
... fire if you set the adapter before setting up the listener.
That being said, a simple boolean flag would allow you to detect the rogue first selection event and ignore it.
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Is there a float input type in HTML5?
...alue attribute, if specified and not empty, must have a value that is a valid floating point number."
8 Answers
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Get records with max value for each group of grouped SQL results
...ou want is first, then group by the columns you want the value for.
You avoid complicated subqueries that try to find the max() etc, and also the problems of returning multiple rows when there are more than one with the same maximum value (as the other answers would do)
Note: This is a mysql-only so...
How to sort an array of objects with jquery or javascript [duplicate]
...rs who use IE 7/8/9. We haven't had any issues with this code. Can you provide more information about your code?
– Ketan
Mar 6 '13 at 17:00
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