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How can I use Async with ForEach?
...better solution? If simultaneously, should the results be in original item order or in order of completion? Should it fail on the first failure or wait until all have completed? Etc.
– Stephen Cleary
Oct 17 '19 at 18:01
...
How would you implement an LRU cache in Java?
...s not a LRU cache. This is because re-putting an entry does not affect the order of the entries (a real LRU cache will place the last-inserted entry at the back of the iteration order regardless of whether that entry initially exists in the cache)
– Pacerier
Fe...
Error in plot.new() : figure margins too large in R
...
This sometimes happen in RStudio. In order to solve it you can attempt to plot to an external window (Windows-only):
windows() ## create window to plot your file
## ... your plotting code here ...
dev.off()
...
Why is std::map implemented as a red-black tree?
...e rebalancing (up to half the depth of the tree).
RB-trees are B-trees of order 4 represented as binary search trees. A 4-node in the B-tree results in two levels in the equivalent BST. In the worst case, all the nodes of the tree are 2-nodes, with only one chain of 3-nodes down to a leaf. That le...
Fatal error: Class 'ZipArchive' not found in
...eed to compile PHP with zip support. The manual says the following:
In order to use these functions you must compile PHP with zip support by using the --enable-zip configure option.
It's not enough to simply install the correct extensions on the server. Have a look at the installation instru...
SSL certificate rejected trying to access GitHub over HTTPS behind firewall
...1+n) ".pem"} /-----END CERTIFICATE-----/ {n++}'
$ c_rehash
Important: In order to use c_rehash you have to install openssl-perl too.
Ignore SSL certificate verification.
WARNING: Disabling SSL certificate verification has security implications. Without verification of the authenticity of SSL/HTTP...
Difference between core and processor
...), maintaining the correct program state, registers, and correct execution order, and performing the operations through ALUs. For optimization purposes, a core can also hold on-core caches with copies of frequently used memory chunks.
A CPU may have one or more cores to perform tasks at a given ti...
Django: “projects” vs “apps”
... @claymation , what should be included in settings (as app) in order to allow 'python manage.py makemigrations' or 'python manage.py migrate' to see the 'models.py' file in 'my product' directory ?
– mlwn
Aug 16 '16 at 10:47
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TCP loopback connection vs Unix Domain Socket performance
...ead of TCP (congestion control, flow control, stream management (IP packet ordering, retransmission, etc) ). Unix domain sockets do not do any of the above because it was designed from the ground up to be ran locally, meaning no congestion issues, no speed differences between server/client requiring...
List comprehension vs map
...uages: you only get this benefit if you access your data left-to-right "in order", because python generator expressions can only be evaluated the order x[0], x[1], x[2], ....
However let's say that we have a pre-made function f we'd like to map, and we ignore the laziness of map by immediately forc...