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Overriding id on create in ActiveRecord
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13 Answers
13
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How to import module when module name has a '-' dash or hyphen in it?
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edited Dec 2 '11 at 13:56
answered Dec 2 '11 at 2:00
S...
Why are data transfer objects (DTOs) an anti-pattern?
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edited Jan 25 '10 at 3:40
Jim Ferrans
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ans...
?: operator (the 'Elvis operator') in PHP
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543
It evaluates to the left operand if the left operand is truthy, and the right operand otherwise....
In a javascript array, how do I get the last 5 elements, excluding the first element?
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362
You can call:
arr.slice(Math.max(arr.length - 5, 1))
If you don't want to exclude the first...
Google Authenticator implementation in Python
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153
I wanted to set a bounty on my question, but I have succeeded in creating solution. My problem s...
Is there a reason that Swift array assignment is inconsistent (neither a reference nor a deep copy)?
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Note that array semantics and syntax was changed in Xcode beta 3 version (blog post), so the question no longer applies. The following answer applied to beta 2:
It's for performance reasons. Basically, they try to avoid copying arrays as long as they can (and claim "C-like performance...
Changing column names of a data frame
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Use the colnames() function:
R> X <- data.frame(bad=1:3, worse=rnorm(3))
R> X
bad worse
1 1 -2.440467
2 2 1.320113
3 3 -0.306639
R> colnames(X) <- c("good", "better")
R> X
good better
1 1 -2.440467
2 2 1.320113
3 3 -0.306639
You can also...
In-memory size of a Python structure
Is there a reference for the memory size of Python data stucture on 32- and 64-bit platforms?
7 Answers
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