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How to set Oracle's Java as the default Java in Ubuntu?
How do I change the value of JAVA_HOME in Ubuntu to point to Oracle's Java?
8 Answers
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How do I escape reserved words used as column names? MySQL/Create Table
...a class may have a field name key which is a reserved MySQL keyword. How do I escape it in a create table statement? (Note: The other problem below is text must be a fixed size to be indexed/unique)
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How do I pipe a subprocess call to a text file?
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If you want to write the output to a file you can use the stdout-argument of subprocess.call.
It takes None, subprocess.PIPE, a file object or a file descriptor. The first is the default, stdout is inherited from the parent (your script). The second allows you to pipe from one comman...
How can I make a weak protocol reference in 'pure' Swift (without @objc)
weak references don't seem to work in Swift unless a protocol is declared as @objc , which I don't want in a pure Swift app.
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Is 'float a = 3.0;' a correct statement?
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It is not an error to declare float a = 3.0 : if you do, the compiler will convert the double literal 3.0 to a float for you.
However, you should use the float literals notation in specific scenarios.
For performance reasons:
Specifically, consider:
float foo(float x) { ...
How do you clear a stringstream variable?
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This is the most efficient and most elegant way to do it compared to all other answers here. However, std::stringstream::swap is a c++11 feature and this solution doesn't work for prior c++11 compilers.
– 101010
Nov 3 '14 at 9:48
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SVN checkout ignore folder
Can I ignore a folder on svn checkout? I need to ignore DOCs folder on checkout at my build server.
10 Answers
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iPhone app signing: A valid signing identity matching this profile could not be found in your keycha
I'm pulling my hair out over this. I just downloaded the iPhone 3.0 SDK , but now I can't get my provisioning profiles to work. Here is what I have tried:
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Get the value of an instance variable given its name
...capsulation.
If you explicitly want to access an ivar, the right thing to do is to make it an accessor. Consider the following:
class Computer
def new(cpus)
@cpus = cpus
end
end
In this case, if you did Computer.new, you would be forced to use instance_variable_get to get at @cpus. But i...
An algorithm for inflating/deflating (offsetting, buffering) polygons
How would I "inflate" a polygon? That is, I want to do something similar to this:
12 Answers
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