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Ruby Metaprogramming: dynamic instance variable names
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This is actually a really great way to do it since this is pretty much what Struct is made for.
– Chuck
Jul 19 '11 at 5:37
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What is the function of the push / pop instructions used on registers in x86 assembly?
...es. The general usage is
push eax ; preserve the value of eax
call some_method ; some method is called which will put return value in eax
mov edx, eax ; move the return value to edx
pop eax ; restore original eax
A push is a single instruction in x86, which do...
Less aggressive compilation with CSS3 calc
....5em"); }
In Less 1.4.0 we will have a strictMaths option which requires all Less calculations to be within brackets, so the calc will work "out-of-the-box". This is an option since it is a major breaking change. Early betas of 1.4.0 had this option on by default. The release version has it off by...
Is Hash Rocket deprecated?
... I can't find any definitive reference stating the Hash Rocket form is actually deprecated/unadvised as of Ruby 1.9.
1 Answ...
Is it possible to have empty RequestParam values use the defaultValue?
... the @RequestParam type to an Integer and make it not required. This would allow your request to succeed, but it would then be null. You could explicitly set it to your default value in the controller method:
@RequestMapping(value = "/test", method = RequestMethod.POST)
@ResponseBody
public void te...
How do I concatenate or merge arrays in Swift?
...ith Sequence's flatMap(_:) method
Swift provides a flatMap(_:) method for all types that conform to Sequence protocol (including Array). flatMap(_:) has the following declaration:
Returns an array containing the concatenated results of calling the given transformation with each element of this ...
How can I define a composite primary key in SQL?
...(from that table). If a primary key consists of two or more columns it is called a composite primary key. It is defined as follows:
CREATE TABLE voting (
QuestionID NUMERIC,
MemberID NUMERIC,
PRIMARY KEY (QuestionID, MemberID)
);
The pair (QuestionID,MemberID) must then be unique for the ta...
How to automatically generate N “distinct” colors?
I wrote the two methods below to automatically select N distinct colors. It works by defining a piecewise linear function on the RGB cube. The benefit of this is you can also get a progressive scale if that's what you want, but when N gets large the colors can start to look similar. I can also imagi...
In Maven 2, how do I know from which dependency comes a transitive dependency?
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This didn't work for me; all I got was errors about unsupported 'legacy' values. Running @David Crow's version (i.e. without the velocity flag) worked fine though.
– Vlad Schnakovszki
Feb 28 '17 at 13:51
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How can I change a secret Gist to public?
... @VonC my bad, I wanted to write "(only Secret -> Public)". So basically you can only make public a gist that was previously private. When it is public it will stay public.
– GiDo
Jul 7 '16 at 16:28
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