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LEFT OUTER joins in Rails 3
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@posts = Post.joins("LEFT OUTER JOIN users ON users.id = posts.user_id").
joins(:blog).select
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RESTful password reset
...rther to comment below)
I would go for something like this:
POST /users/:user_id/reset_password
You have a collection of users, where the single user is specified by the {user_name}. You would then specify the action to operate on, which in this case is reset_password. It is like saying "Create ...
What is the recommended way to delete a large number of items from DynamoDB?
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What I ideally want to do is call LogTable.DeleteItem(user_id) -
Without supplying the range, and have it delete everything for me.
An understandable request indeed; I can imagine advanced operations like these might get added over time by the AWS team (they have a history o...
Best way to strip punctuation from a string
...sting it with python 3 on linux it works even without the flag using tamil letters, தமிழ்.
– Matthias
Feb 3 '16 at 15:31
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Why does modern Perl avoid UTF-8 by default?
...es, \p{Lowercase} and \p{Lower} are different from \p{Ll} and \p{Lowercase_Letter}.
Code that uses [a-zA-Z] is even worse. And it can’t use \pL or \p{Letter}; it needs to use \p{Alphabetic}. Not all alphabetics are letters, you know!
If you are looking for ???? variables with /[\$\@\%]\w+/, then ...
What is the advantage to using bloom filters?
...is that you can have only one filter (you check whether the combination of user_id + article_id is there)
bitcoin uses bloom filter for wallet synchronization
Akamai's web servers use Bloom filters to prevent "one-hit-wonders" from being stored in its disk caches. One-hit-wonders are web objects req...
How to create composite primary key in SQL Server 2008
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CREATE TABLE UserGroup
(
[User_Id] INT NOT NULL,
[Group_Id] INT NOT NULL
CONSTRAINT PK_UserGroup PRIMARY KEY NONCLUSTERED ([User_Id], [Group_Id])
)
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How to make a great R reproducible example
...() can randomize a vector, or give a random vector with only a few values. letters is a useful vector containing the alphabet. This can be used for making factors.
A few examples :
random values : x <- rnorm(10) for normal distribution, x <- runif(10) for uniform distribution, ...
a permuta...
How to send email to multiple recipients using python smtplib?
... email, and the delivery.
msg["To"] is essentially what is printed on the letter. It doesn't actually have any effect. Except that your email client, just like the regular post officer, will assume that this is who you want to send the email to.
The actual delivery however can work quite different...
How to implement the activity stream in a social network
...out 15 million activities.
It looks something like this:
id
user_id (int)
activity_type (tinyint)
source_id (int)
parent_id (int)
parent_type (tinyint)
time (datetime but a smaller type like int would be better)
activity_type tells me the type of activity...