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TypeError: 'dict_keys' object does not support indexing
...ict_keys object behaves a lot more like just the keys half of a dict. Specifically, they support O(1) membership testing (and other set-like methods that can be implemented efficiently on top of that fact). These things aren't possible with a list and if you want a list of the dict's keys, you've ...
Pandas read_csv low_memory and dtype options
...erly deprecated, but it should be, since it does not actually do anything differently[source]
The reason you get this low_memory warning is because guessing dtypes for each column is very memory demanding. Pandas tries to determine what dtype to set by analyzing the data in each column.
Dtype Guessi...
How do I convert Long to byte[] and back in java
...e better off using a library like Guava in the vast majority of cases. And if you have some strange opposition to libraries, you should probably consider this answer first for native java solutions. I think the main thing my answer really has going for it is that you don't have to worry about the en...
How to check if a Unix .tar.gz file is a valid file without uncompressing?
I have found the question How to determine if data is valid tar file without a file? , but I was wondering: is there a ready made command line solution?
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Disable spell-checking on HTML textfields
...ccepted? it does not make sense because it can override the users settings if the browser allows it. see ms2ger's answer.
– usr
Aug 15 '09 at 22:52
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Export query result to .csv file in SQL Server 2008
...comma-delimited text.
To save the results of a query to a file: Ctrl + Shift + F
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Java; String replace (using regular expressions)?
... Is it possible to use a precompiled pattern? This might be useful if you do replaceAll with the same regex many times.
– qed
Nov 5 '14 at 20:35
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Query a parameter (postgresql.conf setting) like “max_connections”
Does anyone know if it's even possible (and how, if yes) to query a database server setting in PostgreSQL (9.1)?
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ld cannot find an existing library
...with g++ on this Debian lenny system. ld is complaining it cannot find specified libraries. The specific example here is ImageMagick, but I am having similar problems with a few other libraries too.
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VB.NET equivalent to C# var keyword [duplicate]
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Option Infer must be on in order for this to function properly. If so, then omitting the type in VB.NET (Visual Basic 9) will implicitly type the variable.
This is not the same as "Option Strict Off" in previous versions of VB.NET, as the variable is strongly-typed; it's just done so imp...