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Get top n records for each group of grouped results
...have more than two groups, then you would need to specify the group number and add queries for each group:
(
select *
from mytable
where `group` = 1
order by age desc
LIMIT 2
)
UNION ALL
(
select *
from mytable
where `group` = 2
order by age desc
LIMIT 2
)
There are a variet...
How do I parse JSON with Ruby on Rails? [duplicate]
I'm looking for a simple way to parse JSON, extract a value and write it into a database in Rails.
12 Answers
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How do I view events fired on an element in Chrome DevTools?
...fired when I interact with it because I am trying to find out which event handler to use.
5 Answers
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How can I mask a UIImageView?
....layer.mask = mask;
yourImageView.layer.masksToBounds = YES;
For Swift 4 and plus follow code below
let mask = CALayer()
mask.contents = [ UIImage(named: "right_challenge_bg")?.cgImage] as Any
mask.frame = CGRect(x: 0, y: 0, width: leftBGImage.frame.size.width, height: leftBGImage.frame.size.hei...
Add SUM of values of two LISTS into new LIST
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just curious how would zip() handles if array lengths for different? i.e what does zip returns for different array lengths and how would that affect the operation for x + y
– ealeon
Oct 24 '15 at 15:00
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Setting the selected value on a Django forms.ChoiceField
...
the tuples represent (value, label) pairs for the options and you want to specify the initial value - so the '3' refers to the first item.
– Tom
Oct 29 '17 at 10:19
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How to draw a line in android
Can anybody tell how to draw a line in Android, perhaps with an example?
15 Answers
1...
Why declare a struct that only contains an array in C?
.... If the call / return don't optimize away, a medium to large array (thousands of bytes) is a terrible thing to pass by value.
– Peter Cordes
Jun 11 '18 at 16:49
add a commen...
Is there a way to make a PowerShell script work by double clicking a .ps1 file?
... to fetch an IP address from the Vsphere client, make an mstsc connection, and log it in a shared file.
19 Answers
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Cannot import XSSF in Apache POI
I am referencing the version 3.7 of the Apache POI and I am getting a "cannot be resolved" error when I do:
11 Answers
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