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what is the most efficient way of counting occurrences in pandas?
...].astype('str').stack().value_counts().sum() which equates to setting each selected column to str type, stacking all individual columns on top, forming basically one column and then doing the value_counts() and sum() on that one column. :) Stack is pretty useful, it might not be the most obvious cho...
postgresql port confusion 5433 or 5432?
...instances running so make sure you're connecting to the right one by using select version() and SHOW data_directory;.
You can also specify a unix socket directory; check the unix_socket_directories setting of the PostgreSQL instance you wish to connect to and specify that with psql -h, e.g.psql -h...
How does one escape backslashes and forward slashes in VIM find/search?
...with a backslash:
:%s/<dog\/>/<cat\\>
But note that you can select a different delimiter instead:
:%s@<doc/>@<cat\\>@
This saves you all typing all those time-consuming, confusing backslashes in patterns with a ton of slashes.
From the documentation:
Instead of th...
Cannot open backup device. Operating System error 5
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Go to the SQL server folder in start menu and click configuration tools
Select SQL Server configuration manager
On SQL server services, on the desired instance change the (Log On as) to local system
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What rules does Pandas use to generate a view vs a copy?
I'm confused about the rules Pandas uses when deciding that a selection from a dataframe is a copy of the original dataframe, or a view on the original.
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unable to locate nuget.exe when building webservice on appharbor
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Enable NuGet Package Restore
Right click on solution then
select Enable NuGet Package Restore
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How to search DOM elements using XPath or CSS selectors in Chrome Developer Tools?
...ogle.com/chrome/devtools/docs/elements.html says it supports XPath or CSS selectors, but when I tried, didn't seem to work for me.
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sql server invalid object name - but tables are listed in SSMS tables list
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Make sure that the selected DB is the one where the table is. I was running the Script on Master. In my case, I had to switch to hr_db.
Rookie mistake but, could help someone.
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Detecting Browser Autofill
...e change event.
Firefox 4 does dispatch the change change event when users select a value from a list of suggestions and tab out of the field.
Chrome 9 does not dispatch the change event.
Safari 5 does dispatch the change event.
You best options are to either disable autocomplete for a form usin...
How to open Atom editor from command line in OS X?
...ot able to notice it. What I had to do was to remove the symlinks and then select the Install Shell Commands from the Atom menu. There was no need to restart the console as the atom command worked immediately after selecting the option. I ran sudo rm /usr/local/bin/atom and sudo rm /usr/local/bin/ap...