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How to 'insert if not exists' in MySQL?
...… ON DUPLICATE KEY UPDATE syntax, you can find explanations on dev.mysql.com
Post from bogdan.org.ua according to Google's webcache:
18th October 2007
To start: as of the latest MySQL, syntax presented in the title is not
possible. But there are several very easy ways to accomplish w...
Python unit test with base and sub class
...--------------------------------------------------------
Ran 4 tests in 0.001s
OK
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What tools to automatically inline CSS style to create email HTML code? [closed]
When you take a look at http://www.campaignmonitor.com/css/ you learn that you need to embed inline styles in your HTML, in order for your email to be read in any mail client.
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How to Join to first row
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How do you do this if the join is via a compound key/has multiple columns?
– Brett Ryan
Sep 12 '12 at 7:20
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Easy way to convert Iterable to Collection
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This is my question: stackoverflow.com/questions/4896662/… . Unfortunately the simple answer that doesn't solve the problem is by using Iterables.concat(). The much longer answer gives Collection ... I wonder why this isn't more commonly supported?
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How to convert an xml string to a dictionary?
...that someone created. I've used it several times.
http://code.activestate.com/recipes/410469-xml-as-dictionary/
Here is the code from the website just in case the link goes bad.
from xml.etree import cElementTree as ElementTree
class XmlListConfig(list):
def __init__(self, aList):
f...
How to manage client-side JavaScript dependencies? [closed]
...corejs.org/underscore-min.js", // Remote
backbone: "https://github.com/documentcloud/backbone/blob/master/backbone-min.js" // Remote on github
},
shim: {
backbone: {
deps: ["underscore", "jquery"] // Backbone depends on jquery and underscore
}
}
});
r...
How to get the URL without any parameters in JavaScript?
... It's missing port, so this will return incorrect result for page http://www.example.com:8080/asdf.html?foo=bar
– izogfif
Aug 17 '18 at 15:00
6
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Lambda capture as const reference?
...pose.
– Kyle Strand
Apr 28 '16 at 1:01
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MySQL Error 1093 - Can't specify target table for update in FROM clause
... use in the SELECT part.
This behaviour is documented at:
http://dev.mysql.com/doc/refman/5.6/en/update.html
Maybe you can just join the table to itself
If the logic is simple enough to re-shape the query, lose the subquery and join the table to itself, employing appropriate selection criteria. Th...