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Strings in a DataFrame, but dtype is object
...ndarray. Every element in a ndarray must has the same size in byte. For int64 and float64, they are 8 bytes. But for strings, the length of the string is not fixed. So instead of save the bytes of strings in the ndarray directly, Pandas use object ndarray, which save pointers to objects, because of ...
python pandas: apply a function with arguments to a series
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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C dynamically growing array
... 3/2 gives you 50% worst and 25% typical. It's also close to the effective base of the Fibionacci sequence in the limit (phi) which is often praised and used for its "exponential but much less violently than base-2" characteristics, but easier to calculate. The +8 means that arrays which are reasona...
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...
Hibernate: Automatically creating/updating the db tables based on entity classes
...ated -->
<property name="javax.persistence.schema-generation.database.action" value="drop-and-create" />
</properties>
used Wildfly's in-memory H2 database
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What are the “must have” jQuery plugins? [closed]
...bjects and arrays. That's all this is for. It doesn't actually talk to databases on the server side.
– Hugoware
Nov 6 '08 at 5:09
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Maximum length of HTTP GET request
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Chrome 32779 >64k
Android 8192 >64k
Firefox >64k >64k
Safari >64k >64k
Internet Explorer 11 2047 5120
Edge 16 2047 ...
Is it better to call ToList() or ToArray() in LINQ queries?
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JaredParJaredPar
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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...
How to use SCNetworkReachability in Swift
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Swift 3, IPv4, IPv6
Based on the Martin R's answer:
import SystemConfiguration
func isConnectedToNetwork() -> Bool {
guard let flags = getFlags() else { return false }
let isReachable = flags.contains(.reachable)
let needsConnec...