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How to access object attribute given string corresponding to name of that attribute
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Antti Haapala
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answered Apr 10 '10 at 7:25
Pratik DeogharePratik Deoghare
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Python Pandas: Get index of rows which column matches certain value
... frame (whose data may be gibabytes). What about dftest? Doesn't this also allocate a very large intermediate object where the returned index may be very small, or even empty. Are these magically optimized away using lazy views. If not then surely there must be an efficient way.
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Multiple aggregations of the same column using pandas GroupBy.agg()
... functions f1, f2 to the same column df["returns"] , without having to call agg() multiple times?
3 Answers
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Dokan虚拟磁盘开发实战 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...AN_OPTIONS;
ProcessId: ULONG; // Process id for the thread that originally requested the I/O operation
IsDirectory: Boolean; // Indicates a directory file
DeleteOnClose: Boolean; // Delete when Cleanup is called
PagingIo: Boolean; // Read or write is paging IO
SynchronousIo:...
Backbone.View “el” confusion
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A views el is where all the event binding takes place. You don't have to use it but if you want backbone to fire events you need to do your rendering work on the el. A views el is a DOM element but it does not have to be a pre-existing element. ...
Rails 4 multiple image or file upload using carrierwave
...tiple_image_upload_carrierwave
In gem file
gem 'carrierwave'
bundle install
rails generate uploader Avatar
Create post scaffold
rails generate scaffold post title:string
Create post_attachment scaffold
rails generate scaffold post_attachment post_id:integer avatar:string
rake db:migrate
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Using global variables between files?
...e project, with around 50 files, and I need to define global variables for all those files.
6 Answers
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Python JSON serialize a Decimal object
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This implementation doesn't work anymore. Elias Zamaria's one is the one working on the same style.
– piro
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Django migration strategy for renaming a model and relationship fields
...n files (!).
Update: As ceasaro mentions, newer versions of Django are usually able to detect and ask if a model is renamed. So try manage.py makemigrations first and then check the migration file.
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PHP check whether property exists in object or class
... edited Mar 15 at 15:51
Abel Callejo
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answered Jan 19 '13 at 12:32
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