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Replacement for “rename” in dplyr
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dplyr version 0.3 added a new rename() function that works just like plyr::rename().
df <- rename(df, new_name = old_name)
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i...
Unique constraint on multiple columns
...LL,
[scode] [int] NULL,
[dcode] [int] NULL,
[name] [nvarchar](50) NULL,
[address] [nvarchar](50) NULL,
CONSTRAINT [PK_user_1] PRIMARY KEY CLUSTERED
(
[userID] ASC
),
CONSTRAINT [UQ_codes] UNIQUE NONCLUSTERED
(
[fcode], [scode], [dcode]
)
) ON ...
How to upper case every first letter of word in a string? [duplicate]
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answered Jul 19 '09 at 13:11
akarnokdakarnokd
61.8k1414 gold badges131131 silver badges173173 bronze badges
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'size_t' vs 'container::size_type'
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108
The standard containers define size_type as a typedef to Allocator::size_type (Allocator is a t...
How to map and remove nil values in Ruby
...ct it to become the norm very soon.
For example:
numbers = [1, 2, 5, 8, 10, 13]
enum.filter_map { |i| i * 2 if i.even? }
# => [4, 16, 20]
In your case, as the block evaluates to falsey, simply:
items.filter_map { |x| process_x url }
"Ruby 2.7 adds Enumerable#filter_map" is a good read on t...
Can a dictionary be passed to django models on create?
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edited Oct 15 '09 at 21:15
answered Oct 15 '09 at 10:49
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postgresql - sql - count of `true` values
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10 Answers
10
Active
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Merge cells using EPPlus?
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answered May 30 '11 at 5:49
Carles CompanyCarles Company
6,40855 gold badges4747 silver badges7171 bronze badges
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Javascript shorthand ternary operator
...:)
– Web_Designer
Jan 16 '12 at 18:10
8
For anyone curious, this works because JS's || operator d...
What exactly happens when I set LoadUserProfile of IIS pool?
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– David d C e Freitas
Jun 5 '14 at 0:29
3
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