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How to request a random row in SQL?
...r even medium sized tables. My recommendation would be to use some kind of indexed numeric column (many tables have these as their primary keys), and then write something like:
SELECT * FROM table WHERE num_value >= RAND() *
( SELECT MAX (num_value ) FROM table )
ORDER BY num_value LIMIT 1...
AngularJS : How do I switch views from a controller function?
...ould directly change the window.location (using the $location service!) in
index.html file
<div ng-controller="Cntrl">
<div ng-click="changeView('edit')">
edit
</div>
<div ng-click="changeView('preview')">
preview
</...
How to organize a node app that uses sequelize?
...sequelize: https://github.com/sequelize/express-example/blob/master/models/index.js - you can browse the whole project to get an idea of what's going on).
p.s.
I'm editing this post as it's so upvoted that people won't even see any new answers (as I did).
Edit: Just changed the link to a copy of the...
What's the purpose of git-mv?
...:
mv oldname newname
git add newname
git rm oldname
i.e. it updates the index for both old and new paths automatically.
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How to access the ith column of a NumPy multidimensional array?
...,:]
array([3, 4])
lets you access rows. This is covered in Section 1.4 (Indexing) of the NumPy reference. This is quick, at least in my experience. It's certainly much quicker than accessing each element in a loop.
shar...
How can I force WebKit to redraw/repaint to propagate style changes?
...within an absolutely position element which did not, at the time, have a z-index. Adding a z-index to this element changed the behaviour of Chrome and repaints happened as expected -> animations became smooth.
I doubt that this is a panacea, I imagine it depends why Chrome has chosen not to red...
Bootstrap modal appearing under background
...above but didn't get it to work using those.
What did work: setting the z-index of the .modal-backdrop to -1.
.modal-backdrop {
z-index: -1;
}
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Creating a dictionary from a csv file?
...n using pandas.
import pandas as pd
pd.read_csv('coors.csv', header=None, index_col=0, squeeze=True).to_dict()
If you want to specify dtype for your index (it can't be specified in read_csv if you use the index_col argument because of a bug):
import pandas as pd
pd.read_csv('coors.csv', header=N...
Better way to shuffle two numpy arrays in unison
...
Your can use NumPy's array indexing:
def unison_shuffled_copies(a, b):
assert len(a) == len(b)
p = numpy.random.permutation(len(a))
return a[p], b[p]
This will result in creation of separate unison-shuffled arrays.
...
How to let PHP to create subdomain automatically for each user?
... !\.(png|gif|jpg)$
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)$ /index.php?uri=$1&hostName=%{HTTP_HOST}
This ignores images and maps everything else to my index.php file. So if I go to
http://fred.mywebsite.com/album/Dance/now
I get back
http://fred.mywebsite.com/index.php?uri=al...