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How to wait for all threads to finish, using ExecutorService?
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Basically on an ExecutorService you call shutdown() and then awaitTermination():
ExecutorService taskExecutor = Executors.newFixedThreadPool(4);
while(...) {
taskExecutor.execute(new MyTask());
}
taskExecutor.shutdown();
try {
taskExecutor.awaitTermination(Long.MAX_VALUE,...
How do I read CSV data into a record array in NumPy?
...o a record array, much in the way that R's read.table() , read.delim() , and read.csv() family imports data to R's data frame?
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Meaning of epsilon argument of assertEquals for double values
... The documentation says, "delta - the maximum delta between expected and actual for which both numbers are still considered equal." So I think that should be a <= not <.
– Andrew Cheong
Apr 16 '18 at 17:00
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Heroku/GoDaddy: send naked domain to www [closed]
...ed domain for my website to redirect to the www domain. I am using Heroku and have the domain from GoDaddy. Because of Heroku, my A records are already set up as:
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Fast way to discover the row count of a table in PostgreSQL
...IN pg_namespace n ON n.oid = c.relnamespace
WHERE c.relname = 'mytable'
AND n.nspname = 'myschema'
Or better still
SELECT reltuples::bigint AS estimate
FROM pg_class
WHERE oid = 'myschema.mytable'::regclass;
Faster, simpler, safer, more elegant. See the manual on Object Identifier Type...
How do I use Assert to verify that an exception has been thrown?
...message is treated as a string that needs to matcvh the exception message (and IU think that makes more sense)
– Ruben Bartelink
Jun 25 '09 at 10:48
29
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Does async(launch::async) in C++11 make thread pools obsolete for avoiding expensive thread creation
...rong. I was under the impression that Linux thread creation was very cheap and after testing I determined that the overhead of function call in a new thread vs. a normal one is enormous. The overhead for creating a thread to handle a function call is something like 10000 or more times slower than a ...
Use of Initializers vs Constructors in Java
So I've been brushing up on my Java skills as of late and have found a few bits of functionality that I didn't know about previously. Static and Instance Initializers are two such techniques.
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Vertically centering Bootstrap modal window
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This does the job : http://jsfiddle.net/sRmLV/1140/
It uses a helper-div and some custom css. No javascript or jQuery required.
HTML (based on Bootstrap's demo-code)
<button class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">Launch demo modal</button>
<!-- ...
Creating a favicon [closed]
... I discovered I needed more than 10 kinds of files to work in all browsers and devices :(
I got pissed and created my own favicon generator, that creates all these files and the correct HTML header for each one of them: faviconit.com
Hope you enjoy it.
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