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Adding two numbers concatenates them instead of calculating the sum
...hey are actually strings, not numbers. The easiest way to produce a number from a string is to prepend it with +:
var x = +y + +z;
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In Gradle, how do I declare common dependencies in a single place?
...cyManagement> section of the parent POM, and reference that dependency from child modules without specifying the version or scope or whatever.
...
What exception classes are in the standard C++ library
...ull pointer
std::bad_weak_ptr <memory> constructing a shared_ptr from a bad weak_ptr
std::logic_error <stdexcept> errors detectable before the program executes
std::domain_error <stdexcept> parameter outside the valid range
std::future_error <future> v...
How to design a database for User Defined Fields?
...define the data domains. Don't underestimate the performance hit resulting from on-the-fly data type conversion. Such
constraints also help RDBMS query
optimizers develop more effective
plans.
Should you ever need to use foreign
keys, built-in declarative
referential
integrity is rarely out-per...
Get dimension from XML and set text size in runtime
...', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f14540293%2fget-dimension-from-xml-and-set-text-size-in-runtime%23new-answer', 'question_page');
}
);
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php: determine where function was called from
is there a way to find out, where a function in PHP was called from?
example:
8 Answers
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When does invoking a member function on a null instance result in undefined behavior?
...tly stated. (Notes are non-normative.)
However, one can try to deduced it from §3.10/2:
An lvalue refers to an object or function.
When dereferencing, the result is an lvalue. A null pointer does not refer to an object, therefore when we use the lvalue we have undefined behavior. The proble...
nano error: Error opening terminal: xterm-256color
...
Worked for me when ran on the remove system. Connection from was OS X -> Ubuntu
– Ryan Griffith
Jul 4 '16 at 14:09
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django-debug-toolbar not showing up
.... In *nix, you can do that simply with find . -name "*.pyc" -exec rm {} \; from the project root. Finally, run python manage.py shell and execute from django.conf import settings and check the value of settings.INSTALLED_APPs.
– Chris Pratt
May 9 '12 at 14:42
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jQuery disable a link
...e default behaviour of a hyperlink, which is to visit the specified href.
From the jQuery tutorial:
For click and most other events, you
can prevent the default behaviour -
here, following the link to jquery.com
- by calling event.preventDefault() in the event handler
If you want to pre...