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Return 0 if field is null in MySQL
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Use IFNULL:
IFNULL(expr1, 0)
From the documentation:
If expr1 is not NULL, IFNULL() returns expr1; otherwise it returns expr2. IFNULL() returns a numeric or string value, depending on the context in which it is used.
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Plot logarithmic axes with matplotlib in python
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404
You can use the Axes.set_yscale method. That allows you to change the scale after the Axes obje...
How do you clear a slice in Go?
...definition of 'clear'. One of the valid ones certainly is:
slice = slice[:0]
But there's a catch. If slice elements are of type T:
var slice []T
then enforcing len(slice) to be zero, by the above "trick", doesn't make any element of
slice[:cap(slice)]
eligible for garbage collection. This ...
For each row return the column name of the largest value
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100
One option using your data (for future reference, use set.seed() to make examples using sample ...
How Pony (ORM) does its tricks?
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210
Pony ORM author is here.
Pony translates Python generator into SQL query in three steps:
Deco...
How do I draw a shadow under a UIView?
...eeds to happen after
CGContextSetShadow(currentContext, CGSizeMake(-15, 20), 5);
but before
CGContextRestoreGState(currentContext);
So if you want the superclass's drawRect: to be 'wrapped' in a shadow, then how about if you rearrange your code like this?
- (void)drawRect:(CGRect)rect {
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urllib2.HTTPError: HTTP Error 403: Forbidden
...atch/get_quote/getHistoricalData.jsp?symbol=JPASSOCIAT&fromDate=1-JAN-2012&toDate=1-AUG-2012&datePeriod=unselected&hiddDwnld=true"
hdr = {'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11',
'Accept': 'text/h...
Android Studio: Plugin with id 'android-library' not found
... 'com.android.tools.build:gradle:1.1.1'
}
}
Replace version string 1.0.+ with the latest version. Released versions of Gradle plugin can be found in official Maven Repository or on MVNRepository artifact search.
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Creating Multifield Indexes in Mongoose / MongoDB
...d2: ?
– Damon Yuan
Oct 26 '15 at 5:04
9
@DamonYuan They set the sort order of the fields in the ...