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Check if string contains only whitespace
...False otherwise.
A character is whitespace if in the Unicode character database (see unicodedata), either its general category is Zs (“Separator, space”), or its bidirectional class is one of WS, B, or S.
Combine that with a special case for handling the empty string.
Alternatively, you could u...
Regex to test if string begins with http:// or https://
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JakeTheSnake
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answered Jan 10 '11 at 2:03
cdhowiecdhowie
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Convert string with comma to integer
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How about this?
"1,112".delete(',').to_i
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How is this fibonacci-function memoized?
By what mechanism is this fibonacci-function memoized?
4 Answers
4
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Preventing twitter bootstrap carousel from auto sliding on page load
So is there anyway to prevent twitter bootstrap carousel from auto sliding on the page load unless the next or previous button is clicked?
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How to split a delimited string in Ruby and convert it to an array?
...it(",").map { |s| s.to_i }
=> [1, 2, 3, 4]
Or for later versions of ruby (>= 1.9 - as pointed out by Alex):
>> "1,2,3,4".split(",").map(&:to_i)
=> [1, 2, 3, 4]
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Is mongodb running?
I have installed mongodb and the php drivers on my unix server.
9 Answers
9
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Update just one gem with bundler
I use bundler to manage dependencies in my rails app, and I have a gem hosted in a git repository included as followed:
8 A...
Python Graph Library [closed]
...plication that will make heavy use of a graph data structure. Nothing horribly complex, but I'm thinking some sort of graph/graph-algorithms library would help me out. I've googled around, but I don't find anything that particularly leaps out at me.
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Why does X[Y] join of data.tables not allow a full outer join, or a left join?
This is a bit of a philosophical question about data.table join syntax. I am finding more and more uses for data.tables, but still learning...
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