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What is the Scala annotation to ensure a tail recursive function is optimized?
...eption("bang!")
| else bang(x-1)
| }
| }
<console>:9: error: could not optimize @tailrec annotated method: it contains a recursive call not in tail position
@tailrec def boom(x: Int): Int = {
^
<console>:13: error: could not optimize @tailrec ann...
“Cloning” row or column vectors
Sometimes it is useful to "clone" a row or column vector to a matrix. By cloning I mean converting a row vector such as
9 A...
CreateProcess error=206, The filename or extension is too long when running main() method
I have this error in eclipse helios:
26 Answers
26
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How to get a specific “commit” of a gem from github?
I'm using rails_admin , and since it is in (very) active development, bugs turn up every now and then.
2 Answers
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Delete all local changesets and revert to tree
I'm using Mercurial and I've got into a terrible mess locally, with three heads. I can't push, and I just want to delete all my local changes and commits and start again with totally clean code and a clean history.
...
How to perform file system scanning
...ath"
"os"
"flag"
"fmt"
)
func visit(path string, f os.FileInfo, err error) error {
fmt.Printf("Visited: %s\n", path)
return nil
}
func main() {
flag.Parse()
root := flag.Arg(0)
err := filepath.Walk(root, visit)
fmt.Printf("filepath.Walk() returned %v\n", err)
}
Please note th...
pip broke. how to fix DistributionNotFound error?
Whenever i try to use pip I get an error. For exampple:
11 Answers
11
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Why won't my PHP app send a 404 error?
...
@SuperCat thanks , now i reread the error and everything is clear now.,
– user1642018
Jan 6 '15 at 6:10
add a comment
...
Javascript “Not a Constructor” Exception while creating objects
...
The code as posted in the question cannot generate that error, because Project is not a user-defined function / valid constructor.
function x(a,b,c){}
new x(1,2,3); // produces no errors
You've probably done something like this:
function Project(a,b,c) {}
Project...
An established connection was aborted by the software in your host machine
...
I was getting these errors too and was stumped.
After reading and trying the two answers above, I was still getting the error.
However,I checked the processes tab of Task Manager to find a rogue copy of 'eclipse.exe *32' that the UI didn' t sho...