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How to delete from select in MySQL?
...an either SELECT then DELETE in separate queries, or nest another subquery and alias the inner subquery result (looks rather hacky, though):
DELETE FROM posts WHERE id IN (
SELECT * FROM (
SELECT id FROM posts GROUP BY id HAVING ( COUNT(id) > 1 )
) AS p
)
Or use joins as sugges...
Ruby: How to turn a hash into HTTP parameters?
...onality was removed from the gem.
Julien, your self-answer is a good one, and I've shameless borrowed from it, but it doesn't properly escape reserved characters, and there are a few other edge cases where it breaks down.
require "addressable/uri"
uri = Addressable::URI.new
uri.query_values = {:a ...
How to prevent a dialog from closing when a button is clicked
...input. When I click the "yes" button on dialog, it will validate the input and then close the dialog. However, if the input is wrong, I want to remain in the same dialog. Every time no matter what the input is, the dialog should be automatically closed when I click on the "no" button. How can I disa...
How to add images to README.md on GitHub?
... srcs should be on the github.com domain, not the raw.github.com subdomain and not the raw.githubusercontent.com domain.
– Lee Crossley
Jun 24 '14 at 6:25
...
What is the difference between lemmatization vs stemming?
...
Short and dense: http://nlp.stanford.edu/IR-book/html/htmledition/stemming-and-lemmatization-1.html
The goal of both stemming and lemmatization is to reduce inflectional forms and sometimes derivationally related forms of a word t...
Store password in TortoiseHg
...//username:password@hostname.com/repo.
This is explained in Google Code's and Mercurial's FAQs.
EDIT: Mercurial FAQ explains another way to do it:
With Mercurial 1.3 you can also add an auth section to your hgrc file:
[auth]
example.prefix = https://hg.example.net/
example.username = foo
exam...
Differences between Proxy and Decorator Pattern
Can you give any good explanation what is the difference between Proxy and Decorator ?
8 Answers
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How do you change the document font in LaTeX?
...
I found the solution thanks to the link in Vincent's answer.
\renewcommand{\familydefault}{\sfdefault}
This changes the default font family to sans-serif.
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What is the easiest way to duplicate an activerecord record?
... Does this still work in Rails 3.1.0.beta? When I do q = p.clone, and then p == q, I get true back. On the other hand, if I use q = p.dup, I get false back when comparing them.
– Juno Woods
Feb 8 '11 at 2:10
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How to disable and re-enable console logging in Python?
I am using Python's logging module and I want to disable the console logging for some time but it doesn't work.
17 Answer...