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How does “304 Not Modified” work exactly?
...he If-Modified-Since or If-None-Match header, telling the server to send a 304 if the content still has that date or ETag.
The server needs some way of calculating a date-modified or ETag for each version of each resource; this typically comes from the filesystem or a separate database column.
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Math.random() versus Random.nextInt(int)
...s in its mantissa, so it is uniformly distributed in the range 0 to 1-(2^-53).
Random.nextInt(n) uses Random.next() less than twice on average- it uses it once, and if the value obtained is above the highest multiple of n below MAX_INT it tries again, otherwise is returns the value modulo n (th...
Why invoke Thread.currentThread.interrupt() in a catch InterruptException block?
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Java Concurrency in Practice discusses this in more detail in Chapter 7.1.3: Responding to Interruption. Its rule is:
Only code that implements a thread's interruption policy may swallow an interruption request. General-purpose task and library code should never swallow interruption requests.
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How do I tell Matplotlib to create a second (new) plot, then later plot on the old one?
...re and plot data2, and finally come back to the original plot and plot data3, kinda like this:
4 Answers
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In JavaScript, does it make a difference if I call a function with parentheses?
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Nissa
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answered Jul 14 '10 at 14:09
PekkaPekka
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How do I run a single test with Nose in Pylons
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234
nosetests appname.tests.functional.test_controller should work, where the file is named test_co...
Check if value already exists within list of dictionaries?
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273
Here's one way to do it:
if not any(d['main_color'] == 'red' for d in a):
# does not exist
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What does SQL clause “GROUP BY 1” mean?
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edited Aug 20 '18 at 12:03
answered Sep 12 '11 at 19:12
Yu...
How are VST Plugins made?
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edited Oct 18 '13 at 10:06
sashkello
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What do @, - and + do as prefixes to recipe lines in Make?
... normally executed. See also the POSIX specification for make and also §9.3 of the GNU Make manual.
The + notation is a (POSIX-standardized) generalization of the de facto (non-standardized) mechanism whereby a command line containing ${MAKE} or $(MAKE) is executed under make -n.
(@ is discusse...