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Python Sets vs Lists
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236
It depends on what you are intending to do with it.
Sets are significantly faster when it com...
Group by with multiple columns using lambda
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258
var query = source.GroupBy(x => new { x.Column1, x.Column2 });
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How to trace the path in a Breadth-First Search?
...aths.
# graph is in adjacent list representation
graph = {
'1': ['2', '3', '4'],
'2': ['5', '6'],
'5': ['9', '10'],
'4': ['7', '8'],
'7': ['11', '12']
}
def bfs(graph, start, end):
# maintain a queue of paths
queue = []
# push the first p...
symfony 2 twig limit the length of the text and put three dots
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208
{{ myentity.text|length > 50 ? myentity.text|slice(0, 50) ~ '...' : myentity.text }}
You...
How can I disable logging of asset pipeline (sprockets) messages in Ruby on Rails 3.1?
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382
Place the following code in config/initializers/quiet_assets.rb
if Rails.env.development?
Rai...
What regular expression will match valid international phone numbers?
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23 Answers
23
Active
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PHP substring extraction. Get the string before the first '/' or the whole string
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262
Use explode()
$arr = explode("/", $string, 2);
$first = $arr[0];
In this case, I'm using th...
Version number comparison in Python
... then compare the lists of numbers.
import re
def mycmp(version1, version2):
def normalize(v):
return [int(x) for x in re.sub(r'(\.0+)*$','', v).split(".")]
return cmp(normalize(version1), normalize(version2))
This is the same approach as Pär Wieslander, but a bit more compact:
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How to get number of entries in a Lua table?
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132
You already have the solution in the question -- the only way is to iterate the whole table with...
Multi-line commands in GHCi
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answered Dec 9 '11 at 8:52
Nicolas WuNicolas Wu
4,26722 gold badges2222 silver badges3232 bronze badges
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