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Pandas selecting by label sometimes return Series, sometimes returns DataFrame
...duces instances that have a particular structure originated in the NDFrame base class, itself derived from the PandasContainer base class that is also a parent class of the Series class.
Note that this is correct for Pandas until version 0.12. In the upcoming version 0.13, Series will derive also f...
What is the optimal algorithm for the game 2048?
... well.
Since the game is a discrete state space, perfect information, turn-based game like chess and checkers, I used the same methods that have been proven to work on those games, namely minimax search with alpha-beta pruning. Since there is already a lot of info on that algorithm out there, I'll j...
Maximum length of HTTP GET request
...--------------------------------
Chrome 32779 >64k
Android 8192 >64k
Firefox >64k >64k
Safari >64k >64k
Internet Explorer 11 2047 5120
Edge 16 2047 ...
What is the maximum possible length of a .NET string?
...
Based on my highly scientific and accurate experiment, it tops out on my machine well before 1,000,000,000 characters. (I'm still running the code below to get a better pinpoint).
UPDATE:
After a few hours, I've given up. Fi...
Generating a unique machine id
...ock. In practice, this will be rare, but be aware if you expect it to be a base for security that can be attacked by hardcore hackers.
Of course a registry entry can also be easily changed by anyone to forge a machine GUID, but what I found is that this would disrupt normal operation of so many com...
How to change the default charset of a MySQL table?
...t to apply this change for all tables that are not encoded in ut8 in a database, you can use this query and execute the resulted queries : SELECT concat('alter table ', table_name, ' CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;') FROM information_schema.tables WHERE table_schema='<yo...
How to convert UTF-8 byte[] to string?
... Well, good luck unpacking it if it has non-ascii. Just use Convert.ToBase64String.
– Erik Bergstedt
Dec 12 '15 at 10:30
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Convert from ASCII string encoded in Hex to plain ASCII?
...his, here's one of the shortest, using only python-provided stuff:
import base64
hex_data ='57696C6C20796F7520636F6E76657274207468697320484558205468696E6720696E746F20415343494920666F72206D653F2E202E202E202E506C656565656173652E2E2E212121'
ascii_string = str(base64.b16decode(hex_data))[2:-1]
print (a...
How to iterate over values of an Enum having flags?
...tFlags(Enum value, Enum[] values)
{
ulong bits = Convert.ToUInt64(value);
List<Enum> results = new List<Enum>();
for (int i = values.Length - 1; i >= 0; i--)
{
ulong mask = Convert.ToUInt64(values[i]);
if (i == 0 && m...
What exactly is LLVM?
...el language can be represented in this LLVM IR format, then analysis tools based on this IR can be easily reused - that is the basic rationale.
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