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Is there a rule-of-thumb for how to divide a dataset into training and validation sets?
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FWIW, variance in the performance can be calculated by classifying all the instances once, scoring the decisions as to whether they are correct or not, and then sampling these decisions instead of test instances to produce the effects of using different test set sizes
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Python: Best way to add to sys.path relative to the current running script
... I would do sys.path.insert(0, ..) so that it doesn't get overridden by other paths.
– John Jiang
Feb 8 '19 at 19:04
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File path to resource in our war/WEB-INF folder?
... this seems good, but i am using java 1.8 and getContext() doesn't exist by default, which jar file is needed to use it?
– f1wade
Sep 20 '16 at 14:46
3
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How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?
...unique key on geb and topic it will work (ALTER TABLE table ADD UNIQUE geb_by_topic (geb, topic)).
– chaos
Aug 2 '09 at 13:43
1
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How to delete (not cut) in Vim?
...contents of the (volatile) default register "", which has been overwritten by dd. But you still can paste from the (non volatile) yank register "0, which won't be overwritten by the delete command dd.
So these are the commands you want to use as per your example:
yy
dd
"0p
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Angular.js: How does $eval work and why is it different from vanilla eval?
...lly placed in bindings such as {{ expression }}. Expressions are processed by $parse service.
It's a JavaScript-like mini-language that limits what you can run (e.g. no control flow statements, excepting the ternary operator) as well as adds some AngularJS goodness (e.g. filters).
Q: Why isn't pl...
How to check a checkbox in capybara?
...kboxes. As @buruzaemon already mentioned:
to find and check a checkbox by name, id, or label text.
So lets assume you got a checkbox in your html like:
<label>
<input type="checkbox" value="myvalue" name="myname" id="myid">
MyLabel
</label>
You could check this wit...
How to convert milliseconds to “hh:mm:ss” format?
...put:
01:00:00
I realised that my code above can be greatly simplified by using a modulus division instead of subtraction:
String hms = String.format("%02d:%02d:%02d", TimeUnit.MILLISECONDS.toHours(millis),
TimeUnit.MILLISECONDS.toMinutes(millis) % TimeUnit.HOURS.toMinutes(1),
TimeUnit....
Avoiding SQL injection without parameters
...n, because when you double the single quote the first one is still escaped by the backslash, leaving the 2nd one "active":
x\' OR 1=1;--
Also, JulianR brings up a good point below: NEVER try to do security work yourself. It's so easy to get security programming wrong in subtle ways that ap...
Best practice for Django project working directory structure
...ates/static directory, not inside each app.
These files are usually edited by people, who doesn't care about project code
structure or python at all. If you are full-stack developer working alone or
in a small team, you can create per-app templates/static directory. It's really just a matter of tast...