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difference between each.with_index and each_with_index in Ruby?
...dex do |value, index|
puts "#{index}: #{value}"
end
Outputs:
2: foo
3: bar
4: baz
0: foo
1: bar
2: baz
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How to properly add cross-site request forgery (CSRF) token using PHP
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How to increment a pointer address and pointer's value?
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answered Nov 21 '11 at 6:34
felipemaiafelipemaia
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Implement paging (skip / take) functionality with this query
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answered Nov 4 '12 at 18:35
Radim KöhlerRadim Köhler
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Best way to use html5 data attributes with rails content_tag helper?
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Rails 3.1 ships with built-in helpers:
http://api.rubyonrails.org/classes/ActionView/Helpers/TagHelper.html#method-i-tag
E.g.,
tag("div", :data => {:name => 'Stephen', :city_state => %w(Chicago IL)})
# => <div dat...
How to Customize the time format for Python logging?
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236
From the official documentation regarding the Formatter class:
The constructor takes two op...
Git remote branch deleted, but still it appears in 'branch -a'
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answered Feb 23 '11 at 20:32
Mark LongairMark Longair
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Different types of thread-safe Sets in Java
...want to be sure all changes are immediately visible to the other threads.
3) ConcurrentSkipListSet is the concurrent SortedSet implementation, with most basic operations in O(log n). It allows concurrent adding/removing and reading/iteration, where iteration may or may not tell about changes since ...
Insert a row to pandas dataframe
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Just assign row to a particular index, using loc:
df.loc[-1] = [2, 3, 4] # adding a row
df.index = df.index + 1 # shifting index
df = df.sort_index() # sorting by index
And you get, as desired:
A B C
0 2 3 4
1 5 6 7
2 7 8 9
See in Pandas documentation Indexing: Setti...
How to create nonexistent subdirectories recursively using Bash?
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437
You can use the -p parameter, which is documented as:
-p, --parents
no error if existing, make...