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Simplest/Cleanest way to implement singleton in JavaScript?
...letons are in use. Singleton is not only guarantee that there will be only one object of given class. Singleton has few more features: 1) it should be initialized at first use (which not only means delayed initialization, but also guarantee that object is really ready to be used) 2) it should be thr...
How does Google's Page Speed lossless image compression work?
...mpressParams(PNG_ALL_FILTERS, Z_FILTERED),
PngCompressParams(PNG_FILTER_NONE, Z_DEFAULT_STRATEGY),
PngCompressParams(PNG_FILTER_NONE, Z_FILTERED)
};
When all four combinations are applied, the smallest result is kept. Simple as that.
(N.B.: The optipng command line tool does that too if you p...
Git file permissions on Windows
...
Handy one-liner for Git Bash:
find . -name '*.sh' | xargs git update-index --chmod=+x
It will mark all .sh file as executable.
After that, you just have to git commit.
...
Python memory usage of numpy arrays
...umpy array, so it's not critical how you got the array in the first place. One could similarly criticize this answer by saying that it reshapes an existing array.
– Moot
Jun 17 '18 at 14:11
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How can I convert a file pointer ( FILE* fp ) to a file descriptor (int fd)?
...tes from the file descriptor might give you unexpected results.
To answer one of the side questions, to convert a file descriptor to a FILE pointer, use fdopen(3)
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How to make Sequelize use singular table names
... looks for the table USERS whenever I am trying to save in the DB. Does anyone know how to set Sequelize to use singular table names? Thanks.
...
SparseArray vs HashMap
... Also true, but if they'd overloaded the put method by including one with signature put(int a, T t) you'd still be able to put key-value pairs into the map without keys being auto-boxed. I just think that the Collections Framework is so powerful (one of the best reasons for using Java) tha...
Python, Unicode, and the Windows console
... type(line), len(line); \
sys.stdout.write(line); print line' | cat
None
<type 'unicode'> 2
Б
Б
There's some more information on that page, well worth a read.
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Has anyone actually implemented a Fibonacci-Heap efficiently?
Has anyone of you ever implemented a Fibonacci-Heap ? I did so a few years back, but it was several orders of magnitude slower than using array-based BinHeaps.
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C# How can I check if a URL exists/is valid?
...ssue a "HEAD" request rather than a "GET"?
(edit) - lol! Looks like I've done this before!; changed to wiki to avoid accusations of rep-garnering. So to test a URL without the cost of downloading the content:
// using MyClient from linked post
using(var client = new MyClient()) {
client.HeadOn...