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What is the best way to concatenate two vectors?
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@Gman: That's a fair point since we know that the source is also a vector (where iterator distance has O(1) complexity). Still, the performance guarantees of insert are something to be mindful of when you can often do better by planning ahead.
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Using comparison operators in Scala's pattern matching system
... 1 => "greater than ten"
case -1 => "less than ten"
})
}
Now, the documentation for scala.math.Ordering.compare(T, T) promises only that the non-equal outcomes will be greater than or less than zero. Java's Comparable#compareTo(T) is specified similarly to Scala's. It happens to be...
Min/Max-value validators in asp.net mvc
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Great answer. I would modify the error message a bit: "Enter a value greater than or equal to " is a more (grammatically-speaking) correct error message.
– Tieson T.
Jul 26 '12 at 0:04
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How do I run a Java program from the command line on Windows?
... saved your file as A.text first thing you should do is save it as A.java. Now it is a Java file.
Now you need to open cmd and set path to you A.java file before compile it. you can refer this for that.
Then you can compile your file using command
javac A.java
Then run it using
java A
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How to read a large file line by line?
...ion to read the file line by line:
$handle = fopen("inputfile.txt", "r");
if ($handle) {
while (($line = fgets($handle)) !== false) {
// process the line read.
}
fclose($handle);
} else {
// error opening the file.
}
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“Single-page” JS websites and SEO
... a lot of cool tools for making powerful "single-page" JavaScript websites nowadays. In my opinion, this is done right by letting the server act as an API (and nothing more) and letting the client handle all of the HTML generation stuff. The problem with this "pattern" is the lack of search engine s...
How are GCC and g++ bootstrapped?
...version of GCC with the one you just built
(optional) repeat step 2 for verification purposes.
This process is called bootstrapping. It tests the compiler's capability of compiling itself and makes sure that the resulting compiler is built with all the optimizations that it itself implements.
EDI...
Quickly find whether a value is present in a C array?
...h an array of size 256 (preferably 1024, but 256 is the minimum) and check if a value matches the arrays contents. A bool will be set to true is this is the case.
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How to free memory in Java?
...s.
Not recommended.
Edit: I wrote the original response in 2009. It's now 2015.
Garbage collectors have gotten steadily better in the ~20 years Java's been around. At this point, if you're manually calling the garbage collector, you may want to consider other approaches:
If you're forcing G...
Best way to iterate through a Perl array
...g. breadth-first searches): my @todo = $root; while (@todo) { my $node = shift; ...; push @todo, ...; ...; }
– ikegami
Feb 2 '15 at 14:40
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