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How to import local packages without gopath
...hogonal to any parent/child relations of packages. The only real hierarchy formed by packages is the dependency tree, which in the general case does not reflect the directory tree.
Just use
import "myproject/packageN"
and don't fight the build system for no good reason. Saving a dozen of charact...
Forward an invocation of a variadic function in C
...ght be able to declare a macro that does what you want:
#define my_printf(format, ...) \
do { \
fprintf(stderr, "Calling printf with fmt %s\n", format); \
some_other_variadac_function(format, ##__VA_ARGS__); \
} while(0)
In general, though, the best solution is to use the ...
Java: how do I get a class literal from a generic type?
...t2.add("foo"); // perfectly legal
The only instance where generic type information is retained at runtime is with Field.getGenericType() if interrogating a class's members via reflection.
All of this is why Object.getClass() has this signature:
public final native Class<?> getClass();
Th...
What is the difference between pluck and collect in Rails?
... an array, without constructing ActiveRecord objects. This means better performance for a large or often-running query.
In addition to @apneadiving's answer, pluck can take both single and multiple column names as argument:
Client.pluck(:id, :name)
# SELECT clients.id, clients.name FROM clients
# ...
How do I compare version numbers in Python?
...s used by setuptools (so you probably already have it installed) and is conformant to the current PEP 440; it will return a packaging.version.Version if the version is compliant and a packaging.version.LegacyVersion if not. The latter will always sort before valid versions.
Note: packaging has rece...
Accessing the index in 'for' loops?
... # default is zero
print(item)
print('there were {0} items printed'.format(count))
The count seems to be more what you intend to ask for (as opposed to index) when you said you wanted from 1 to 5.
Breaking it down - a step by step explanation
To break these examples down, say we have a ...
Determine when a ViewPager changes pages
...xchange.using('gps', function() { StackExchange.gps.track('embedded_signup_form.view', { location: 'question_page' }); });
$window.unbind('scroll', onScroll);
}
};
...
Google Sheets API Setup · App Inventor 2 中文网
...ument
2. Share the Google Sheets Document
3. Record Relevant Information
The Spreadsheet ID
The Sheet Name
The Grid ID
Note: If you are only going to read from the Google Sheets document, and not
edit or write data to the d...
Is there a quick way to delete a file from a Jar / war without having to extract the jar and recreat
...p installed instead of zip and in this case it's important to specify file format: 7z d -tzip file.jar dir/unwanted_file.txt
– lapo
Jul 31 '13 at 10:02
...
How to flatten nested objects with linq expression
...xchange.using('gps', function() { StackExchange.gps.track('embedded_signup_form.view', { location: 'question_page' }); });
$window.unbind('scroll', onScroll);
}
};
...