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Facebook API - How do I get a Facebook user's profile image through the Facebook API (without requir
...nal width and height fields as URL parameters:
https://graph.facebook.com/USER_ID/picture?width=WIDTH&height=HEIGHT
where WIDTH and HEIGHT are your requested dimension values.
This will return a profile picture with a minimum size of WIDTH x HEIGHT while trying to preserve the aspect ratio. ...
Comparing two dataframes and getting the differences
...gt;> df.reindex(idx)
Date Fruit Num Color
9 2013-11-25 Orange 8.6 Orange
8 2013-11-25 Apple 22.1 Red
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Automatically deleting related rows in Laravel (Eloquent ORM)
...
You can actually set this up in your migrations:
$table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
Source: http://laravel.com/docs/5.1/migrations#foreign-key-constraints
You may also specify the desired action for the "on delete" and "on
update"...
Pandas index column title or name
...n [10]: df
Out[10]:
Column 1
foo
Apples 1
Oranges 2
Puppies 3
Ducks 4
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What's the difference between Ruby's dup and clone methods?
...e
@color = 'red'
end
end
apple = Apple.new
apple.color
=> "red"
orange = apple.clone
orange.color
=> "red"
orange.color << ' orange'
=> "red orange"
apple.color
=> "red orange"
Notice in the above example, the orange clone copies the state (that is, the instance vari...
Rails: Adding an index after adding column
...exToTable < ActiveRecord::Migration
def change
add_index :table, :user_id
end
end
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MongoDB - Update objects in a document's array (nested updating)
...ave to use the positional "$" operator. Something like:
db.bar.update( {user_id : 123456 , "items.item_name" : "my_item_two" } ,
{$inc : {"items.$.price" : 1} } ,
false ,
true);
Note that this will only increment the first matched subdocument i...
Scala how can I count the number of occurrences in a list
...hat cleaner version of one of the other answers is:
val s = Seq("apple", "oranges", "apple", "banana", "apple", "oranges", "oranges")
s.groupBy(identity).mapValues(_.size)
giving a Map with a count for each item in the original sequence:
Map(banana -> 1, oranges -> 3, apple -> 3)
The...
HTML in string resource?
...nslatable="false"><font color="red">P</font><font color="orange">r</font><font color="yellow">e</font><font color="green">m</font><font color="white">i</font><font color="blue">u</font><font color="purple">m</font>...
Rails migration for has_and_belongs_to_many join table
...to be joined by has_and_belongs_to_many are already in the DB : apples and oranges:
create_table :apples_oranges, :id => false do |t|
t.references :apple, :null => false
t.references :orange, :null => false
end
# Adding the index can massively speed up join tables. Don't use the
# uni...