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In Java, are enum types inside a class static?
...r class they'd break the enum guarantee -
e.g. if you had
public class Foo {
private enum Bar {
A, B, C;
}
}
For the enum values to properly act as constants, (psuedocode, ignoring access restrictions)
Bar b1 = new Foo().A
Bar b2 = new Foo().A
b1 and b2 would have to be the s...
Detect when an image fails to load in Javascript
...eNotFound() {
alert('That image was not found.');
}
testImage("http://foo.com/bar.jpg");
And my sympathies for the jQuery-resistant boss!
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python re.sub group: number after \number
How can I replace foobar with foo123bar ?
1 Answer
1
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Using backticks around field names
...th it,
you'll note if you run your query as such
EXPLAIN EXTENDED Select foo,bar,baz
The generated warning that comes back will have back-ticks and fully qualified table names. So if you're using query generation features and automated re-writing of queries, backticks would make anything parsin...
How to access outer class from an inner class?
...native to `with_metaclass`
class Outer(with_metaclass(OuterMeta)):
def foo(self):
return "I'm outer class!"
class Inner(object):
outer = None # <-- by default it's None
def bar(self):
return "I'm inner class"
print(Outer.Inner.outer)
>>> &...
Count, size, length…too many choices in Ruby?
... Something to consider with this is counter_cache. If have a table, foo, and it has_many bar, you'll have a column in foo named bars_count that gets updated anytime a bar is created / destroyed. Using foo.bars.size is what checks that column (without actually querying any bars). foo.bars.coun...
How to read a text-file resource into Java unit test? [duplicate]
...:
package com.example;
import org.apache.commons.io.IOUtils;
public class FooTest {
@Test
public void shouldWork() throws Exception {
String xml = IOUtils.toString(
this.getClass().getResourceAsStream("abc.xml"),
"UTF-8"
);
}
}
Works perfectly. File src/test/resources/c...
How to use GROUP BY to concatenate strings in SQL Server?
...ou can write code like this to get the result you asked for:
CREATE TABLE foo
(
id INT,
name CHAR(1),
Value CHAR(1)
);
INSERT INTO dbo.foo
(id, name, Value)
VALUES (1, 'A', '4'),
(1, 'B', '8'),
(2, 'C', '9');
SELECT id,
dbo.GROUP_CONCAT(name + ':' + Value) AS [Column...
Why does Stream not implement Iterable?
...eam::iterator
To pass a Stream to a method that expects Iterable,
void foo(Iterable<X> iterable)
simply
foo(stream::iterator)
however it probably looks funny; it might be better to be a little bit more explicit
foo( (Iterable<X>)stream::iterator );
...
Get protocol, domain, and port from URL
...n't depend on the DOM.
const url = new URL('http://example.com:12345/blog/foo/bar?startIndex=1&pageSize=10');
Method 2 (old way): Use the browser's built-in parser in the DOM
Use this if you need this to work on older browsers as well.
// Create an anchor element (note: no need to append t...