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How is attr_accessible used in Rails 4?
...ctice, though, this moves Rails away from fat model, thin controller, etc, and towards thin models, and really bloated controllers. You have to write all this stuff for every instance, it doesn't read nicely, and nesting seems to be a pain. The old attr_accessible/attr_accessor in the model system...
Regex for string not ending with given suffix
...sily extend this with other characters, since this checking for the string and isn't a character class.
.*(?<!ab)$
This would match anything that does not end with "ab", see it on Regexr
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Search and replace in bash using regular expressions
...is method, i.e. perl, awk, e.g.:
echo "$MYVAR" | perl -pe 's/[a-zA-Z]/X/g and s/[0-9]/N/g'
This may allow you to do more creative matches... For example, in the snip above, the numeric replacement would not be used unless there was a match on the first expression (due to lazy and evaluation). A...
Using std Namespace
...ng namespace std;. It imports all sorts of names into the global namespace and can cause all sorts of non-obvious ambiguities.
Here are some common identifiers that are in the std namespace: count, sort, find, equal, reverse. Having a local variable called count means that using namespace std won't...
What's the need of array with zero elements?
...n the Linux kernel code I found the following thing which I can not understand.
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How do synchronized static methods work in Java and can I use it for loading Hibernate entities?
...ynchronized on a static method lock you will synchronize the class methods and attributes ( as opposed to instance methods and attributes )
So your assumption is correct.
I am wondering if making the method synchronized is the right approach to ensure thread-safety.
Not really. You should let your...
How can I use an array of function pointers?
... @crucifiedsoul "the C Programming Language" written by Brian Kernighan and Dennis Ritchie? It could be, but I didn't have it as a reference at the time I wrote the answer three and an half year ago. So I don't know.
– VonC
Mar 30 '12 at 1:51
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How to call a Python function from Node.js
...all you have to do is make sure that you import sys in your python script, and then you can access arg1 using sys.argv[1], arg2 using sys.argv[2], and so on.
To send data back to node just do the following in the python script:
print(dataToSendBack)
sys.stdout.flush()
And then node can liste...
Update git commit author date when amending
...--date parameter to git commit. So, if you want to amend the last commit, and update its author date to the current date and time, you can do:
git commit --amend --date="$(date -R)"
(The -R parameter to date tells it to output the date in RFC 2822 format. This is one of the date formats underst...
Is main() really start of a C++ program?
The section $3.6.1/1 from the C++ Standard reads,
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