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Change one value based on another value in pandas
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One option is to use Python's slicing and indexing features to logically evaluate the places where your condition holds and overwrite the data there.
Assuming you can load your data directly into pandas with pandas.read_csv ...
When should you use a class vs a struct in C++?
...y) guaranteed to be laid out as though it were a C struct. Apart from this one exception though, the only difference is as stated.
– workmad3
Sep 18 '08 at 14:22
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Counting inversions in an array
...s.
While merging algorithm counts number of removed inversions (sorted out one might say).
The only moment when inversions are removed is when algorithm takes element from the right side of an array and merge it to the main array.
The number of inversions removed by this operation is the number of ...
Best way to select random rows PostgreSQL
...omplete table once.
For large tables this might not what you want as even one complete table scan might take to long.
A third proposal would be
select * from table where random() < 0.01 limit 1000;
This one stops the table scan as soon as 1000 rows have been found and therefore returns soone...
Entity Attribute Value Database vs. strict Relational Model Ecommerce
...e's a few general pros and cons I can think of, there are situations where one is better than the other:
Option 1, EAV Model:
Pro: less time to design and develop a simple application
Pro: new entities easy to add (might even
be added by users?)
Pro: "generic" interface components
Con: complex co...
Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
...so need an algorithm for factorization over finite fields, for example the one by Berlekamp or Cantor-Zassenhaus.
High level pseudocode for constant k:
Compute i-th powers of given numbers
Subtract to get sums of i-th powers of unknown numbers. Call the sums bi.
Use Newton's identities to compute...
Retrieve specific commit from a remote Git repository
Is there any way to retrieve only one specific commit from a remote Git repo without cloning it on my PC? The structure of remote repo is absolutely same as that of mine and hence there won't be any conflicts but I have no idea how to do this and I don't want to clone that huge repository.
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What's the difference between HEAD, working tree and index, in Git?
Can someone tell me the difference between HEAD, working tree and index, in Git?
5 Answers
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Decompile .smali files on an APK [duplicate]
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The correct link for classyshark is this one: github.com/google/android-classyshark
– Mr Washington
May 30 '19 at 11:10
add a comment
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When is .then(success, fail) considered an antipattern for promises?
...that you shouldn't use it in chains. The expectation is that you only have one final handler which handles all errors - while, when you use the "antipattern", errors in some of the then-callbacks are not handled.
However, this pattern is actually very useful: When you want to handle errors that hap...