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How to 'insert if not exists' in MySQL?
...Imagine we have a table:
CREATE TABLE `transcripts` (
`ensembl_transcript_id` varchar(20) NOT NULL,
`transcript_chrom_start` int(10) unsigned NOT NULL,
`transcript_chrom_end` int(10) unsigned NOT NULL,
PRIMARY KEY (`ensembl_transcript_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
Now imagine t...
Difference between app.use and app.get in express.js
...
app.use() is intended for binding middleware to your application. The path is a "mount" or "prefix" path and limits the middleware to only apply to any paths requested that begin with it. It can even be used to embed another application:
// subapp.js
var expr...
How does this checkbox recaptcha work and how can I use it?
...And I also found this: http://jaswsinc.com/recaptcha-ads/ Apparently they did an invite-only beta of their "no CAPTCHA reCAPTCHA" So.... You probably won't be able to make it work on your site, yet. I can't find any information on opting into the beta, but if you search for "No CAPTCHA reCAPTCHA bet...
Is it possible to set the equivalent of a src attribute of an img tag in CSS?
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without proper browser support I don't see this as a valid answer, sorry.
– emachine
Aug 30 '13 at 17:37
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show 21 more c...
jQuery scroll to element
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Assuming you have a button with the id button, try this example:
$("#button").click(function() {
$([document.documentElement, document.body]).animate({
scrollTop: $("#elementtoScrollToID").offset().top
}, 2000);
});
I got the code from the ar...
Set the absolute position of a view
Is it possible to set the absolute position of a view in Android? (I know that there is an AbsoluteLayout , but it's deprecated...)
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How to order by with union in SQL?
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Just write
Select id,name,age
From Student
Where age < 15
Union
Select id,name,age
From Student
Where Name like "%a%"
Order by name
the order by is applied to the complete resultset
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Rails: where does the infamous “current_user” come from?
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It is defined by several gems, e.g. Devise
You'll need to store the user_id somewhere, usually in the session after logging in. It also assumes your app has and needs users, authentication, etc.
Typically, it's something like:
class ApplicationController < ActionController::Base
def current...
How to find duplicates in 2 columns not 1
I have a MySQL database table with two columns that interest me. Individually they can each have duplicates, but they should never have a duplicate of BOTH of them having the same value.
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Are soft deletes a good idea? [duplicate]
Are soft deletes a good idea or a bad idea?
15 Answers
15
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