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Awaiting multiple Tasks with different results
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After you use WhenAll, you can pull the results out individually with await:
var catTask = FeedCat();
var houseTask = SellHouse();
var carTask = BuyCar();
await Task.WhenAll(catTask, houseTask, carTask);
var cat = await catTask;
var house = await houseTask;
var car = await carTask;
You...
Image.Save(..) throws a GDI+ exception because the memory stream is closed
...inary data which i want to save as an image. When i try to save the image, it throws an exception if the memory stream used to create the image, was closed before the save. The reason i do this is because i'm dynamically creating images and as such .. i need to use a memory stream.
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Which is more preferable to use: lambda functions or nested functions ('def')?
...generally more readable than those functions and can cover all use cases, without the need of lambdas.
For the cases you really need a small function object, you should use the operator module functions, like operator.add instead of lambda x, y: x + y
If you still need some lambda not covered, yo...
Why is sed not recognizing \t as a tab?
...ed script to insert a tab in front of every line in $filename however it is not. For some reason it is inserting a t instead.
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What is the difference between the 'COPY' and 'ADD' commands in a Dockerfile?
...t:
If is a local tar archive in a recognized compression format (identity, gzip, bzip2 or xz) then it is unpacked as a directory. Resources from remote URLs are not decompressed.
Note that the Best practices for writing Dockerfiles suggests using COPY where the magic of ADD is not required. ...
Algorithm to find Largest prime factor of a number
...ethod which is very fast if the input number has two factors very close to its square root is known as Fermat factorisation. It makes use of the identity N = (a + b)(a - b) = a^2 - b^2 and is easy to understand and implement. Unfortunately it's not very fast in general.
The best known method for fa...
if A vs if A is not None:
...uivalents 0 or 1. When this method is not defined, __len__() is called, if it is defined, and the object is considered true if its result is nonzero. If a class defines neither __len__() nor __nonzero__(), all its instances are considered true.
On the other hand,
if A is not None:
compares only...
Real differences between “java -server” and “java -client”?
...ch differ between client and server configuration.
From Chapter 2 of the whitepaper (The Java HotSpot Performance Engine Architecture):
The JDK includes two flavors of the VM -- a client-side offering, and a VM tuned for server applications. These two solutions share the Java HotSpot runtime enviro...
Difference between CouchDB and Couchbase
...en CouchDB and Couchbase Server that need to be pointed out.
I will not write about the advantages of switching from CouchDB to the Couchbase Server because those are described pretty much everywhere (see The Future of CouchDB by Damien Katz or
Couchbase vs. Apache CouchDB
by Couchbase). Instead, ...
Reusing output from last command in Bash
...ster? E.g. something similar to $? capturing the output instead of the exit status.
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