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How do I interpret precision and scale of a number in a database?
...number of decimal places
ie 123456.789 has a scale of 3
Thus the maximum allowed value for decimal(5,2) is 999.99
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Proper usage of Optional.ifPresent()
...r> user = ...
user.ifPresent(this::doSomethingWithUser);
This is basically the same thing as
Optional<User> user = ...
user.ifPresent(new Consumer<User>() {
@Override
public void accept(User theUser) {
doSomethingWithUser(theUser);
}
});
The idea is that the d...
Strange SQLAlchemy error message: TypeError: 'dict' object does not support indexing
... value with this.
So when you want to place single % in string with query allways place double %.
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Extracting text OpenCV
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For some cards the bounding box does not enclose all of the text, such as half a letter getting cut off. Such as this card: i.imgur.com/tX3XrwH.jpg How can I extend every bounding bounding boxes height and width by n? Thanks for the solution it works great!
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CMake: Project structure with unit tests
...sqr.h), and then you can avoid listing (and more importantly re-compiling) all the sources twice.
For question 3, these commands add a test called "MyTest" which invokes your executable "test" without any arguments. However, since you've added these commands to test/CMakeLists.txt and not your top...
Does MySQL foreign_key_checks affect the entire database?
... This means it can be set for session:
SET FOREIGN_KEY_CHECKS=0;
or globally:
SET GLOBAL FOREIGN_KEY_CHECKS=0;
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how to convert a string to date in mysql?
...ourdatefield, '%m/%d/%Y') > CURDATE() - INTERVAL 7 DAY
You can handle all kinds of date/time layouts this way. Please refer to the format specifiers for the DATE_FORMAT() function to see what you can put into the second parameter of STR_TO_DATE().
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OpenShift rhc setup using multiple accounts
...using "server add" command and then you can provide the server nickname in all subsequent commands using --server option.
For example,
rhc server add -l <first_account> --nickname srv1 <first-server>
rhc server add -l <second_account> --nickname srv2 <second-server>
You m...
What's the difference between integer class and numeric class in R
...for double precision floating point numbers) and integer. R will automatically convert between the numeric classes when needed, so for the most part it does not matter to the casual user whether the number 3 is currently stored as an integer or as a double. Most math is done using double precision...
Generic type conversion FROM string
...es" for another class. These properties simply have a name and a value. Ideally, what I would like is to be able to add typed properties, so that the "value" returned is always of the type that I want it to be.
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