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How to set default values in Rails?
...read the original poster's question again, Nikita, and then my comments in order, it may make more sense to you. If not... Well, the question's been answered. Have a nice day.
– SFEley
Mar 22 '11 at 3:06
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Static nested class in Java, why?
... compiler will implicitly prepend the arg sequence of every constructor in order to pass a reference of an instance of the enclosing class. Pretty simple.
– tonix
Mar 12 '15 at 6:55
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Ruby: How to iterate over a range, but in set increments?
...th element to the block. If the range contains numbers or strings, natural ordering is used. Otherwise step invokes succ to iterate through range elements. The following code uses class Xs, which is defined in the class-level documentation.
range = Xs.new(1)..Xs.new(10)
range.step(2) {|x| puts x}
r...
what is .netrwhist?
..., in case you want vim to respect the XDG base directory specifications in order to prevent your home folder from being littered up by dotfiles like ~/.vim, you may want to split cached files and history files from your configuration (which usually resides in the runtime path). So for example, to st...
Anything wrong with NOT signing a .NET assembly?
... than unsigned assemblies, as they must be cryptographically verified.
In order to sign an assembly, any assemblies it depends upon must also be signed. My guess is that this contributes to your colleague's desire to sign everything -- the compiler is demanding it.
EDIT Since writing this answe...
How to create .pfx file from certificate and private key?
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In order to get this to work on openssl 1.0.2m I had to specify -certfile intermediate.crt -certfile rootca.crt before I was prompted to protect the .pfx with a passphrase/password. I believe this is possibly because the .key di...
Why git AuthorDate is different from CommitDate?
...could happen if you make your commit and send your patch to another one in order to apply the patch in another repo: the author date will be the date of your git commit, the commit date will be set to that date when the patch is applied in the other repo.
If you send the patch to two colleagues, th...
Passing variables in remote ssh command
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Escape the variable in order to access variables outside of the ssh session:
ssh pvt@192.168.1.133 "~/tools/myScript.pl \$BUILD_NUMBER"
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Fastest way to duplicate an array in JavaScript - slice vs. 'for' loop
In order to duplicate an array in JavaScript: which of the following is faster to use?
22 Answers
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Assign multiple columns using := in data.table, by group
...r this answer and the examples. How should I modify the following line in order to get two columns for each objectName from the dim output, rather than one column with two rows? data.table(objectName=ls())[,c("rows","cols"):=dim(get(objectName)),by=objectName] (I'm using data.table 1.8.11)
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