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Why aren't superclass __init__ methods automatically invoked?
...ar (it is called during the creation of a new object, after that object is allocated, to set member variables on the new object), and is almost always the place to implement functionality that in other languages you would put in a constructor. So just call it a constructor!
– B...
How to Rotate a UIImage 90 degrees?
...eImage = [UIImage imageNamed:imgname];
UIImage * portraitImage = [[UIImage alloc] initWithCGImage: landscapeImage.CGImage
scale: 1.0
orientation: UIImageOrientationRight];
Note: As Brainware said th...
How do I convert a Vector of bytes (u8) to a string
...("result: {}", s);
}
The conversion is in-place, and does not require an allocation. You can create a String from the string slice if necessary by calling .to_owned() on the string slice (other options are available).
The library reference for the conversion function:
std::str::from_utf8
...
unable to start mongodb local server
...:27017
is self-speaking.
Another instance of mongod is already running and allocating the MongoDB default port which is 27017.
Either kill the other process or use a different port."
In this case, type the following command
ps wuax | grep mongo
You should see something that looks like this
User ...
How to convert image to byte array
...eeling it might have had something to do with a 4K byte boundary in memory allocation. But that could easily be wrong. I switched to using a MemoryStream with a BinaryFormatter and I was able to become very consistent as tested with over 250 different test images of varying formats and sizes, loop...
Difference between a Structure and a Union
...e short answer: a struct is a record structure: each element in the struct allocates new space. So, a struct like
struct foobarbazquux_t {
int foo;
long bar;
double baz;
long double quux;
}
allocates at least (sizeof(int)+sizeof(long)+sizeof(double)+sizeof(long double)) bytes in...
Why does a RegExp with global flag give wrong results?
...he re.lastIndex. This is strange because I would expect a new RegExp to be allocated each time the function is called and not shared across multiple invocations of my function.
When I changed it to:
var re = new RegExp('^([^-]+)-([^-]+)-([^-]+)$', 'g');
Then I don't get the lastIndex holdover ef...
string to string array conversion in java
...rName};
System.out.println(strArray[0]); //prints "name"
The second line allocates a String array with the length of 1. Note that you don't need to specify a length yourself, such as:
String[] strArray = new String[1];
instead, the length is determined by the number of elements in the initalize...
In MySQL what does “Overhead” mean, what is bad about it, and how to fix it?
...
Overhead is Data_free of a table, that is The number of allocated but unused bytes.
We can find it by SQL command SHOW TABLE STATUS. It is the free space in allocated size for your table.
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How do I export UIImage array as a movie?
...riter:
NSError *error = nil;
AVAssetWriter *videoWriter = [[AVAssetWriter alloc] initWithURL:
[NSURL fileURLWithPath:somePath] fileType:AVFileTypeQuickTimeMovie
error:&error];
NSParameterAssert(videoWriter);
NSDictionary *videoSettings = [NSDictionary dictionaryWithObjectsAndKeys:
...