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In Ruby on Rails, what's the difference between DateTime, Timestamp, Time and Date?
... experience, getting dates/times right when programming is always fraught with danger and difficulity.
3 Answers
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Fetch frame count with ffmpeg
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Note: The presence of an edit list in MP4/M4V/M4A/MOV can affect your frame number. See Edit lists below.
ffprobe: Query the container
ffprobe -v error -select_streams v:0 -show_entries stream=nb_frames -of default=nokey=1:noprint_wrappers=1 input....
NHibernate.MappingException: No persister for: XYZ
Now, before you say it: I did Google and my hbm.xml file is an Embedded Resource.
16 Answers
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preventDefault() on an tag
...have some HTML and jQuery that slides a div up and down to show or hide` it when a link is clicked:
11 Answers
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How do I specify different layouts for portrait and landscape orientations?
...erences to being able to specify two separate layout xml files for an activity, one for Portrait and one for Landscape. I've not been to find any information on how to do that though. How do I specify for each activity which xml file is it's portrait layout and which is the Landscape layout?
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How do I find numeric columns in Pandas?
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You could use select_dtypes method of DataFrame. It includes two parameters include and exclude. So isNumeric would look like:
numerics = ['int16', 'int32', 'int64', 'float16', 'float32', 'float64']
newdf = df.select_dtypes(include=numerics)
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Concatenating two one-dimensional NumPy arrays
...py.concatenate((a1, a2, ...), axis=0)
Join a sequence of arrays together.
It was trying to interpret your b as the axis parameter, which is why it complained it couldn't convert it into a scalar.
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How to flip UIImage horizontally?
...Image imageNamed:@"whatever.png"];
UIImage* flippedImage = [UIImage imageWithCGImage:sourceImage.CGImage
scale:sourceImage.scale
orientation:UIImageOrientationUpMirrored];
Swift
let flippedImage = myImage.withHori...
Using [UIColor colorWithRed:green:blue:alpha:] doesn't work with UITableView seperatorColor?
...ted a very simple UIColor category that does the messy looking division by itself: (from http://github.com/Jon889/JPGeneral)
//.h file
@interface UIColor (JPExtras)
+ (UIColor *)colorWithR:(CGFloat)red G:(CGFloat)green B:(CGFloat)blue A:(CGFloat)alpha;
@end
//.m file
@implementation UIColor (JPExt...
What is the difference between an int and an Integer in Java and C#?
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In Java, the 'int' type is a primitive, whereas the 'Integer' type is an object.
In C#, the 'int' type is the same as System.Int32 and is a value type (ie more like the java 'int'). An integer (just like any other value types) can be boxed ("wrapped") into ...