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PostgreSQL: Which Datatype should be used for Currency?
... power of ten, no matter what precision you use. (Precision of 2 is a Bad Idea anyway... check the docs.)
– Doradus
Jan 9 '18 at 12:05
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Disable pasting text into HTML form
...on to do this. Warn someone that what they are trying to do is not a good idea in most cases, but give an answer... or it's best to just not bother replying.
– Halfhoot
Aug 2 '17 at 19:39
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Abusing the algebra of algebraic data types - why does this work?
... automatically and my less-than-subtle choice of names should give you the idea. The (&&&) operator is defined in Control.Arrow, by the way.
The dual of the above is the coproduct A+B with injections inl : A → A+B and inr : B → A+B, where given any type C and functions f : A → C, g...
Pattern to avoid nested try catch blocks?
...ing a 3rd party library and has to do the best they can to ensure success. Ideally, the input could by validated first and the correct calculation function chosen to ensure it will not fail - of course, you could then put all that in a try/catch just to be safe ;)
– musefan
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How do cache lines work?
...e cache memory areas renders the CPU defect as a whole).
To give a timing idea (source: costs to access caches and memory)
L1 cache: 1ns to 2ns (2-4 cycles)
L2 cache: 3ns to 5ns (6-10 cycles)
L3 cache: 12ns to 20ns (24-40 cycles)
RAM: 60ns (120 cycles)
Since we mix different CPU types these ar...
C multi-line macro: do/while(0) vs scope block [duplicate]
.../d/msg/comp.lang.C/xGZxls194mI/dEIpTKz2okMJ
Andrey Tarasevich:
The whole idea of using 'do/while' version is to make a macro which will
expand into a regular statement, not into a compound statement. This is
done in order to make the use of function-style macros uniform with the
use of ordinary fu...
java.net.MalformedURLException: no protocol
... content has to be loaded in memory at the same time, which can be a great idea !
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Compare two objects and find the differences [duplicate]
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I like this idea, but the code here doesn't work. Here's a fiddle that shows a couple of fixes: dotnetfiddle.net/FhzcrS
– Don Rolling
Aug 23 '17 at 18:51
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List of Java processes
... useful. Prints just pid and qualified main class name:
2472 com.intellij.idea.Main
11111 sun.tools.jps.Jps
9030 play.server.Server
2752 org.jetbrains.idea.maven.server.RemoteMavenServer
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Run single test from a JUnit class using command-line
...ps:
Step 1: Compile the Test Class
% javac -cp .:"/Applications/IntelliJ IDEA 13 CE.app/Contents/lib/*" SetTest.java
Step 2: Run the Test
% java -cp .:"/Applications/IntelliJ IDEA 13 CE.app/Contents/lib/*" org.junit.runner.JUnitCore SetTest
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