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What is a stream?
...eyor out, that you connect to other streams and then the box performs some transformation on the data (zipping it, or changing UNIX linefeeds to DOS ones, or whatever). Pipes are another thorough test of the metaphor: that's where you create a pair of streams such that anything you write into one ca...
How do I decode a string with escaped unicode?
...cute some steps on each group of each match, and I can't do that by simply transforming the string. Helpfully, the String.replace operation can accept a function, which will be executed for each match. The return of that function will replace the match itself in the string.
I use the second parame...
Should services always return DTOs, or can they also return domain models?
...ame Application Layer for several UIs (APIs, Controllers) and each one can transform the model as it sees fit. Second, if we were to transform model-to-DTO in App. Layer, that would mean DTO is defined in App. Layer, which in turn means DTO is now part of our Bounded Context (not necessarily Domain!...
Why is a combiner needed for reduce method that converts type in java 8
...stream to the final reduced (green) value. The accumulator function simply transforms a String object into another String.
From String to int (parallel stream)
Suppose having the same 4 strings: your new goal is to sum their lengths, and you want to parallelize your stream.
What you need is somethin...
Why can't yield return appear inside a try block with a catch?
...es in the generated type, so you can freely move code to new methods
Now transform:
try
{
Console.WriteLine("a");
yield return 10;
Console.WriteLine("b");
}
catch (Something e)
{
Console.WriteLine("Catch block");
}
Console.WriteLine("Post");
into (sort of pseudo-code):
case jus...
Covariance, Invariance and Contravariance explained in plain English?
...t heart, these terms describe how the subtype relation is affected by type transformations. That is, if A and B are types, f is a type transformation, and ≤ the subtype relation (i.e. A ≤ B means that A is a subtype of B), we have
f is covariant if A ≤ B implies that f(A) ≤ f(B)
f is contr...
Is 'switch' faster than 'if'?
...ty. Any compiler worth its salt is going to see an if / else if ladder and transform it into equivalent switch or vice versa if it would be faster to do so.
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Reverse a string in Python
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Problem
Context
Python 2.x
Python 3.x
Scenario:
Developer wants to transform a string
Transformation is to reverse order of all the characters
Solution
example01 produces the desired result, using extended slice notation.
Pitfalls
Developer might expect something like string...
Git Symlinks in Windows
... all of the symlinks throughout the repository, as before) for selectively transforming git symlinks into NTFS hardlinks+junctions.
The checkout-symlinks alias has also been updated to accept multiple arguments (or none at all, == everything) for selective reversal of the aforementioned transformati...
Client-server synchronization pattern / algorithm?
...
What you really need is Operational Transform (OT). This can even cater for the conflicts in many cases.
This is still an active area of research, but there are implementations of various OT algorithms around. I've been involved in such research for a number...