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Oracle Differences between NVL and Coalesce
...uments.
DECLARE
int_val INTEGER := 1;
string_val VARCHAR2(10) := 'foo';
BEGIN
BEGIN
DBMS_OUTPUT.PUT_LINE( '1. NVL(int_val,string_val) -> '|| NVL(int_val,string_val) );
EXCEPTION WHEN OTHERS THEN DBMS_OUTPUT.PUT_LINE('1. NVL(int_val,string_val) -> '||SQLERRM );
END;
...
How do you build a Singleton in Dart?
...w Thing._private();
class Thing {
Thing._private() { print('#2'); }
foo() {
print('#3');
}
}
main.dart
import 'package:thing/thing.dart';
main() {
print('#1');
thing.foo();
}
Note that the singleton doesn't get created until the first time the getter is called due to Dart's ...
Is there a difference between /\s/g and /\s+/g?
...would replace only the first \s+, leaving the rest intact. For example, ' foo bar '.replace(/\s+/, '') would give you only 'foo bar ' edit argh HTML condensing two spaces into one
– BoltClock♦
May 11 '11 at 12:45
...
HTML anchor link - href and onclick both?
...
<a href="#Foo" onclick="return runMyFunction();">Do it!</a>
and
function runMyFunction() {
//code
return true;
}
This way you will have youf function executed AND you will follow the link AND you will follow the link ...
When would you use delegates in C#? [closed]
...egister factory functions, for example:
myFactory.RegisterFactory(Widgets.Foo, () => new FooWidget());
var widget = myFactory.BuildWidget(Widgets.Foo);
I hope this helps!
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Do checkbox inputs only post data if they're checked?
...s in your <form> DOM:
<input type="text" name="one" value="foo" />
<input type="text" name="two" value="bar" disabled="disabled" />
<input type="text" name="three" value="first" />
<input type="text" name=...
How do I create a SHA1 hash in ruby?
...
require 'digest/sha1'
Digest::SHA1.hexdigest 'foo'
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How do I write JSON data to a file?
...337, 'help', u'€'],
'a string': 'bla',
'another dict': {'foo': 'bar',
'key': 'value',
'the answer': 42}}
# Write JSON file
with io.open('data.json', 'w', encoding='utf8') as outfile:
str_ = json.dumps(data,
...
Mixin vs inheritance
... my ($self) = @_;
printf("I pity %s\n", $self->_who_do_i_pity('da foo'));
}
Which can be mixed-in to any module containing one, or more, method(s) at a time:
package MrT
use Mixins qw(pity);
sub new {
return bless({}, shift);
}
sub _who_do_i_pity {
return 'da foo!'
}
Then in...
invalid command code ., despite escaping periods, using sed
... For me, adding -e after -i made sed backup all my files in this way: "foo.txt" -> "foo.txt-e". Obviously what I wanted was rather -i '', i.e. don't backup changed files.
– mdup
Oct 2 '14 at 8:51
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