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How much of a git sha is *generally* considered necessary to uniquely identify a change in a given c
...ht to ten characters are more than enough to be unique
within a project. One of the largest Git projects, the Linux kernel,
is beginning to need 12 characters out of the possible 40 to stay
unique.
7 digits is the Git default for a short SHA, so that's fine for most projects. The Kernel team...
Why doesn't c++ have &&= or ||= for booleans?
...&&= and ||= would be logical, and these operators might be error-prone because many developers would expect foo() be always called in x &&= foo().
bool x;
// ...
x &&= foo(); // Many developers might be confused
x = x && foo(); // Still confusing but...
xUnit.net: Global setup + teardown?
...bal initialization/teardown extension point. However, it is easy to create one. Just create a base test class that implements IDisposable and do your initialization in the constructor and your teardown in the IDisposable.Dispose method. This would look like this:
public abstract class TestsBase : I...
How is Perl's @INC constructed? (aka What are all the ways of affecting where Perl modules are searc
...lon-separated) passed as value of the -I command-line option. This can be done in three ways, as usual with Perl options:
Pass it on command line:
perl -I /my/moduledir your_script.pl
Pass it via the first line (shebang) of your Perl script:
#!/usr/local/bin/perl -w -I /my/moduledir
Pass it as...
Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
Following on from this question , can someone explain the following in Scala:
4 Answers
...
Covariance, Invariance and Contravariance explained in plain English?
... is declared by:
Number[] method(ArrayList<Number> list) { ... }
none of the following expressions will compile:
Integer[] result = method(new ArrayList<Integer>());
Number[] result = method(new ArrayList<Integer>());
Object[] result = method(new ArrayList<Object>());
b...
Differences between ExpandoObject, DynamicObject and dynamic
...dited Aug 18 '16 at 13:04
RJFalconer
7,84833 gold badges4141 silver badges5858 bronze badges
answered Aug 25 '10 at 11:57
...
Java 8: performance of Streams vs Collections
...ng to collection -> counting the element count
For streams it can be done by collect(Collectors.counting()). I got results:
Collections: Elapsed time: 41856183 ns (0.041856 seconds)
Streams: Elapsed time: 546590322 ns (0.546590 seconds)
Parallel streams: Elapsed time: 1540051478 ...
Creating a daemon in Linux
...g properly: ps -xj | grep firstdaemon
The output should be similar to this one:
+------+------+------+------+-----+-------+------+------+------+-----+
| PPID | PID | PGID | SID | TTY | TPGID | STAT | UID | TIME | CMD |
+------+------+------+------+-----+-------+------+------+------+-----+
| ...
How to parse an RSS feed using JavaScript?
...
Parsing the Feed
With jQuery's jFeed
(Don't really recommend that one, see the other options.)
jQuery.getFeed({
url : FEED_URL,
success : function (feed) {
console.log(feed.title);
// do more stuff here
}
});
With jQuery's Built-in XML Support
$.get(FEED_URL, fu...