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How to delete object from array inside foreach loop?
I iterate through an array of objects and want to delete one of the objects based on it's 'id' property, but my code doesn't work.
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Can someone explain collection_select to me in clear, simple terms?
I am going through the Rails API docs for collection_select and they are god-awful.
2 Answers
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What is the difference between include and extend in Ruby?
Just getting my head around Ruby metaprogramming. The mixin/modules always manage to confuse me.
6 Answers
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How to avoid merge-commit hell on GitHub/BitBucket
We're ending up with a lot of commits like this in our repo:
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Node.js app can't run on port 80 even though there's no other process blocking the port
I'm running an instance of Debian on Amazon EC2 with Node.js installed. If I run the code below:
9 Answers
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postgresql: INSERT INTO … (SELECT * …)
I'm not sure if its standard SQL:
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For each row return the column name of the largest value
I have a roster of employees, and I need to know at what department they are in most often. It is trivial to tabulate employee ID against department name, but it is trickier to return the department name, rather than the number of roster counts, from the frequency table. A simple example below (colu...
How SignalR works internally?
Can anyone let me know how SignalR works internally in a high level way?
2 Answers
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Git On Custom SSH Port
My VPS provider recommends that I leave my SSH port to the custom port number they assign it by default (not 22). The thing is the while I know I can give the port number when create a remote config, it seems like I can't do the same when doing a git clone. I am using gitolite so I clone commands ...
Is SecureRandom thread safe?
Is SecureRandom thread safe? That is, after initializing it, can access to the next random number be relied on to be thread safe? Examining the source code seems to show that it is, and this bug report seems to indicate that its lack of documentation as thread safe is a javadoc issue. Has anyone...