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Test if string is a number in Ruby on Rails
I have the following in my application controller:
12 Answers
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Generate a random number in the range 1 - 10
Since my approach for a test query which I worked on in this question did not work out, I'm trying something else now. Is there a way to tell pg's random() function to get me only numbers between 1 and 10?
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How to convert list of key-value tuples into dictionary?
I have a list that looks like:
7 Answers
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What is the wix 'KeyPath' attribute?
What is the Wix ' KeyPath ' attribute? In particular, how does it apply to the following:
1 Answer
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How to shift a column in Pandas DataFrame
I would like to shift a column in a Pandas DataFrame , but I haven't been able to find a method to do it from the documentation without rewriting the whole DF. Does anyone know how to do it?
DataFrame:
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What should main() return in C and C++?
What is the correct (most efficient) way to define the main() function in C and C++ — int main() or void main() — and why? And how about the arguments?
If int main() then return 1 or return 0 ?
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How to find out which package version is loaded in R?
I am in a process of figuring out how to use my university cluster. It has 2 versions of R installed. System wide R 2.11 (Debian 6.0) and R 2.14.2 in non-standard location.
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How do I calculate square root in Python?
Why does Python give the "wrong" answer?
10 Answers
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Using CSS how to change only the 2nd column of a table
Using css only, how can I override the css of only the 2nd column of a table.
5 Answers
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How do you set, clear, and toggle a single bit?
How do you set, clear, and toggle a bit?
30 Answers
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