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What is the difference between a URI, a URL and a URN?
...tion"). The term "Uniform Resource Name"
(URN) has been used historically to refer to both URIs under the
"urn" scheme [RFC2141], which are required to remain globally unique
and persistent even when the resource ceases to exist or becomes
unavailable, and to any other URI with ...
Counting the number of elements with the values of x in a vector
...
Don't forget about potential floating point issues, especially with table, which coerces numbers to strings.
– hadley
Dec 17 '09 at 18:10
4
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Clang vs GCC - which produces faster binaries? [closed]
...d
by the fact that any number of tests which take 0 measurable time will
all add up to 0, but the contribution of such tests is negligible. The
timing stats are displayed at the end of make check like this:
coan_test_timer: info: coan processed 70844 input_files.
coan_test_timer: info: run time ...
What are the use-cases for Web Workers? [closed]
...lst you’re using the app.
From Mozilla: One way workers are useful is to allow your code to perform processor-intensive calculations without blocking the user interface thread.
As a practical example, think of an app which has a large table of #s (this is real world, BTW - taken from an app I pr...
What's the difference between a proxy server and a reverse proxy server? [closed]
...ccurate, but perhaps too terse.
I will try to add some examples.
First of all, the word "proxy" describes someone or something acting on behalf of someone else.
In the computer realm, we are talking about one server acting on the behalf of another computer.
For the purposes of accessibility, I wi...
If REST applications are supposed to be stateless, how do you manage sessions?
...ined to be Representational State Transfer . I therefore don't understand all this stateless gobbledeygook that everyone keeps spewing.
...
How to wait in bash for several subprocesses to finish and return exit code !=0 when any subprocess
...
wait also (optionally) takes the PID of the process to wait for, and with $! you get the PID of the last command launched in background.
Modify the loop to store the PID of each spawned sub-process into an array, and then loop again waiting o...
Regular expression for floating point numbers
...ssues in some languages (like Java).
Thanks to the nameless one for originally recognizing this.
One relatively simple pattern for matching a floating point number is
[+-]?([0-9]*[.])?[0-9]+
This will match:
123
123.456
.456
See a working example
If you also want to match 123. (a period w...
Refresh all files in buffer from disk in vim
...
bufdo e curiously leaves all the buffers un-syntax-highlighted
– Steven Lu
Jul 9 '13 at 23:03
...
Idiomatic way to wait for multiple callbacks in Node.js
...erations are obviously asynchronous.
What is the idiomatic way to wait for all operations to finish in order to
know when the temp file can be deleted?
...