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Ruby on Rails - Import Data from a CSV file
I would like to import data from a CSV file into an existing database table. I do not want to save the CSV file, just take the data from it and put it into the existing table. I am using Ruby 1.9.2 and Rails 3.
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MySQL: What's the difference between float and double?
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Perhaps this example could explain.
CREATE TABLE `test`(`fla` FLOAT,`flb` FLOAT,`dba` DOUBLE(10,2),`dbb` DOUBLE(10,2));
We have a table like this:
+-------+-------------+
| Field | Type |
+-------+-------------+
| fla | float |
| flb | float |...
How to version control a record in a database
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Let's say you have a FOO table that admins and users can update. Most of the time you can write queries against the FOO table. Happy days.
Then, I would create a FOO_HISTORY table. This has all the columns of the FOO table. The primary key is th...
How to do a case sensitive search in WHERE clause (I'm using SQL Server)?
... Simply do the following to return all upper case 'D's. "SELECT * FROM SomeTable WHERE ColumnName like '%D%' COLLATE SQL_Latin1_General_CP1_CS_AS"
– Radderz
Dec 12 '16 at 12:19
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How to Create Multiple Where Clause Query Using Laravel Eloquent?
... You can also pass an array of conditions like this: $users = DB::table('users')->where([ ['status', '=', '1'], ['subscribed', '<>', '1'], ])->get();
– zeros-and-ones
Sep 15 '16 at 19:19
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Can you give a Django app a verbose name for use throughout the admin?
...effects what's shown to the user. It's the literal string used to name the table in the database, which requires a schema migration if you're changing an existing model.
– Cerin
Apr 11 '12 at 16:14
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Making a UITableView scroll when text field is selected
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If you use UITableViewController instead of UIViewController, it will automatically do so.
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Natural Sort Order in C#
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This is not portable, only works in Win32, but does not work in Linux / MacOS / Silverlight / Windows Phone / Metro
– linquize
Jul 29 '12 at 9:36
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Managing CSS Explosion
...ible, and grouping related classes as closely as possible.
div.content ul.table_of_contents
div.content ul.table_of_contents li
div.content ul.table_of_contents li h1
div.content ul.table_of_contents li h2
div.content ul.table_of_contents li span.pagenumber
Think of the whole CSS structure as a...
Use of *args and **kwargs [duplicate]
...le named arguments that you have not defined in advance:
>>> def table_things(**kwargs):
... for name, value in kwargs.items():
... print( '{0} = {1}'.format(name, value))
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>>> table_things(apple = 'fruit', cabbage = 'vegetable')
cabbage = vegetable
apple = fruit
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