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Why were pandas merges in python faster than data.table merges in R in 2012?
...to accelerate operations like data selection and merges. In this case (database joins) pandas' DataFrame contains no pre-computed information that is being used for the merge, so to speak it's a "cold" merge. If I had stored the factorized versions of the join keys, the join would be significantly f...
.prop() vs .attr()
...values in other ways: For instance, the parentNode property gets its value based on what its parent element is; an element always has a style property, whether it has a "style" attribute or not.
Let's consider this anchor in a page at http://example.com/testing.html:
<a href='foo.html' class='t...
Function overloading by return type?
...dual operator or function call context-independent.
They wanted it to be based only on how the overload was called - not how the result was used (if it was used at all). Indeed, many functions are called without using the result or the result would be used as part of a larger expression. One facto...
Simplest way to do a fire and forget method in c# 4.0
... task.ContinueWith(
t => handler(t.Exception.GetBaseException()),
TaskContinuationOptions.ExecuteSynchronously |
TaskContinuationOptions.OnlyOnFaulted);
}
}
}
This implementation should have minimal overhead: the continuation i...
Performance of static methods vs instance methods
...ange what it does in your test then your stuck, things like file IO or database access or network calls etc, if put in static method will become unmockable, unless like you say you inject a mockable dependency as a parameter to the static method
– trampster
Oct...
Maven parent pom vs modules pom
... 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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How are people unit testing with Entity Framework 6, should you bother?
...t amounts of time testing what you don't own.
However, you do own the database underneath! This is where this approach in my opinion breaks down, you don't need to test that EF/NH are doing their jobs correctly. You need to test that your mappings/implementations are working with your database. In ...
What is the explanation for these bizarre JavaScript behaviours mentioned in the 'Wat' talk for Code
...sion 1 + “2” is ambiguous since there are two possible interpretations based on the operand types (int, string) and (int int):
User intends to concatenate two strings, result: “12”
User intends to add two numbers, result: 3
Thus with varying input types,the output possibilities increase....
What are the best practices for SQLite on Android?
...d be considered the best practices when executing queries on an SQLite database within an Android app?
10 Answers
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Stopping scripters from slamming your website
...sh (increment and push to top every time an IP comes back). Add heuristics based on reverse IP info, activity, image/js/cookie downloads. Scale your response by how bad the attack is, minimizing consequences of false negatives.
– SquareCog
Feb 11 '09 at 13:30
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