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How to check if a user likes my Facebook Page or URL using Facebook's API
... if (response && response.authResponse) {
var user_id = response.authResponse.userID;
var fql_query = "SELECT uid FROM page_fan WHERE page_id = "+page_id+"and uid="+user_id;
FB.Data.query(fql_query).wait(function(rows) {
if (rows.len...
Validate uniqueness of multiple columns
...cope a validates_uniqueness_of call as follows.
validates_uniqueness_of :user_id, :scope => :friend_id
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How do you use the “WITH” clause in MySQL?
...bers, this stored procedure will help:
----------------------------------
user_id | team_id
----------------------------------
admin | NULL
ramu | admin
suresh | admin
kumar | ramu
mahesh | ramu
randiv | suresh
-----------------------------------
Code:
DROP ...
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. ...
Automatically deleting related rows in Laravel (Eloquent ORM)
...
You can actually set this up in your migrations:
$table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
Source: http://laravel.com/docs/5.1/migrations#foreign-key-constraints
You may also specify the desired action for the "on delete" and "on
update"...
How to create a trie in Python
...... for word in words:
... current_dict = root
... for letter in word:
... current_dict = current_dict.setdefault(letter, {})
... current_dict[_end] = _end
... return root
...
>>> make_trie('foo', 'bar', 'baz', 'barz')
{'b': {'a': {'r': {'_end_':...
Rails: Adding an index after adding column
...exToTable < ActiveRecord::Migration
def change
add_index :table, :user_id
end
end
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Asking the user for input until they give a valid response
...tertools import chain, repeat
from lz.logical import conjoin
def is_one_letter(string: str) -> bool:
return len(string) == 1
rules = [str.isalpha, str.isupper, is_one_letter, 'C'.__le__, 'P'.__ge__]
prompt_msg = "Enter a letter (C-P): "
bad_input_msg = "Wrong input."
prompts = chain([pr...
MongoDB - Update objects in a document's array (nested updating)
...ave to use the positional "$" 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...
Windows path in Python
... os.path.join may not behave as you expect when a component is a drive letter, since relative paths are allowed even then. (The result of the first line is 'C:meshes\\as' on Windows.)
– dash-tom-bang
Jun 1 '10 at 23:04
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