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PostgreSQL: How to make “case-insensitive” query
... It's important to note that using LOWER (or any function) on the predicate columns--in this case "name"--will cause any indexes to no longer be seekable. If this is a large or frequently queried table, that could cause trouble. Case-insensitive collation, citext, or a function-based index will ...
What's the difference between Require.js and simply creating a element in the DOM? [closed]
...ially the one near the bottom that links to stevesouders.com/tests/require.php
– Dave Kanter
Sep 29 '15 at 22:35
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Why use softmax as opposed to standard normalization?
... # blurry image of a ferret
[0.26894142, 0.73105858]) # it is a cat perhaps !?
>>> softmax([10,20]) # crisp image of a cat
[0.0000453978687, 0.999954602]) # it is definitely a CAT !
And then compare it with standard normalisation
>>> std_norm([1,2]) ...
Bash: infinite sleep (infinite blocking)
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sleep infinity does exactly what it suggests and works without cat abuse.
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Unix tail equivalent command in Windows Powershell
... click on the file in Windows Explorer, suddenly PowerShell "wakes up" and catches up the remaining lines. Is this a bug?
– JoshL
Oct 9 '12 at 22:32
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How to pretty print XML from the command line?
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Note that the "cat data.xml | xmllint --format - | tee data.xml" does not work. On my system it sometimes worked for small files, but always truncated huge files. If you really want to do anything in place read backreference.org/2011/01/29/...
How to get the first line of a file in a bash script?
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@sorin, cat ... | read VAR will fail in most shells (all except zsh as far as I know) because each of the components in a pipe will run in separate subshells. Meaning that $VAR will be set in subshell (that cease to exist as soon as ...
setting an environment variable in virtualenv
...s in $VIRTUAL_ENV/bin/. You need the postactivate hook.
$ workon myvenv
$ cat $VIRTUAL_ENV/bin/postactivate
#!/bin/bash
# This hook is run after this virtualenv is activated.
export DJANGO_DEBUG=True
export S3_KEY=mykey
export S3_SECRET=mysecret
$ echo $DJANGO_DEBUG
True
If you want to keep this ...
How to get a list of repositories apt-get is checking? [closed]
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Try this:
cat /etc/apt/sources.list
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Change one value based on another value in pandas
... numpy as np
df = pd.DataFrame([['dog', 'hound', 5],
['cat', 'ragdoll', 1]],
columns=['animal', 'type', 'age'])
In[1]:
Out[1]:
animal type age
----------------------
0 dog hound 5
1 cat ragdoll 1
Below we are adding a new description co...