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Run batch file as a Windows service
...art the service yourself
whitespace is required after =
I did encounter an error on service start that the service did not respond in a timely manner, but it was clear the service had run the .bat successfully. Haven't dug into this yet but this thread experienced the same thing and solved it using ...
Will using goto leak variables?
... int x = 0;
goto lol;
}
int main() {
f();
lol:
return 0;
}
// error: label 'lol' used but not defined
[n3290: 6.1/1]: [..] The scope of a label is the function in which
it appears. [..]
2. Object initialisation
You can't jump across object initialisation:
int main() {
go...
Undefined method 'task' using Rake 0.9.0
...version ( 0.9.0.beta.4 ) and the rake command ends up with the following error message:
8 Answers
...
DROP IF EXISTS VS DROP?
... syntax is
DROP TABLE IF EXISTS table_name;
The first one will throw an error if the table doesn't exist, or if other database objects depend on it. Most often, the other database objects will be foreign key references, but there may be others, too. (Views, for example.) The second will not th...
JavaScript function order: why does it matter?
...
When you call them.
Here's some examples.
bar(); //This won't throw an error
function bar() {}
foo(); //This will throw an error
var foo = function() {}
bar();
function bar() {
foo(); //This will throw an error
}
var foo = function() {}
bar();
function bar() {
foo(); //This _won...
How to check whether a file or directory exists?
...whether the given file or directory exists
func exists(path string) (bool, error) {
_, err := os.Stat(path)
if err == nil { return true, nil }
if os.IsNotExist(err) { return false, nil }
return false, err
}
Edited to add error handling.
...
What is an abstract class in PHP?
...are you?";
}
}
$obj=new AbstractClass();
$obj->printOut();
//Fatal error: Cannot instantiate abstract class AbstractClass
2. Any class that contains at least one abstract method must also be abstract: Abstract class can have abstract and non-abstract methods, but it must contain at least o...
Detect when an image fails to load in Javascript
...) {
var tester=new Image();
tester.onload=imageFound;
tester.onerror=imageNotFound;
tester.src=URL;
}
function imageFound() {
alert('That image is found and loaded');
}
function imageNotFound() {
alert('That image was not found.');
}
testImage("http://foo.com/bar.jpg");
...
Better to 'try' something and catch the exception or test if it's possible first to avoid an excepti
...ind an element in a long list by:
try:
x = my_list[index]
except IndexError:
x = 'NO_ABC'
the try, except is the best option when the index is probably in the list and the IndexError is usually not raised. This way you avoid the need for an extra lookup by if index < len(my_list).
Pyt...
Capistrano error tar: This does not look like a tar archive
...
Whenever I have hit this error it was because the branch specified in my deploy/environment.rb file wasn't checked into git. Do an add / commit / git push origin branch_name and that will likely make things work.
...