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how to permit an array with strong parameters
...t you can add it as hash if you want to avoid syntax error. params.permit(:foo, { bar: [] }, :zoo).
– Foo Bar Zoo
Mar 13 '18 at 20:28
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How do you unit test a Celery task?
... in Django is:
from django.test import TestCase, override_settings
from .foo import foo_celery_task
class MyTest(TestCase):
@override_settings(CELERY_ALWAYS_EAGER=True)
def test_foo(self):
self.assertTrue(foo_celery_task.delay())
...
Adding two Java 8 streams, or an extra element to a stream
...t and Stream.of, the first example could be written as follows:
Stream<Foo> stream = concat(stream1, concat(stream2, of(element)));
Importing static methods with generic names can result in code that becomes difficult to read and maintain (namespace pollution). So, it might be better to cre...
Python Flask, how to set content type
...m flask import Response
@app.route('/ajax_ddl')
def ajax_ddl():
xml = 'foo'
return Response(xml, mimetype='text/xml')
The actual Content-Type is based on the mimetype parameter and the charset (defaults to UTF-8).
Response (and request) objects are documented here: http://werkzeug.pocoo.o...
Normalization in DOM parsing with java - how does it work?
...pty Text nodes.
This basically means that the following XML element
<foo>hello
wor
ld</foo>
could be represented like this in a denormalized node:
Element foo
Text node: ""
Text node: "Hello "
Text node: "wor"
Text node: "ld"
When normalized, the node will look l...
Modern way to filter STL container?
...e the example from cplusplus.com for std::copy_if:
std::vector<int> foo = {25,15,5,-5,-15};
std::vector<int> bar;
// copy only positive numbers:
std::copy_if (foo.begin(), foo.end(), std::back_inserter(bar), [](int i){return i>=0;} );
std::copy_if evaluates the lambda expression f...
How to use Servlets and Ajax?
...rm" action="someservlet" method="post">
<input type="text" name="foo" />
<input type="text" name="bar" />
<input type="text" name="baz" />
<input type="submit" name="submit" value="Submit" />
</form>
You can progressively enhance it with ajax as bel...
FirstOrDefault: Default value other than null
...d NullReferenceException when I'm working with collections:
public class Foo
{
public string Bar{get; set;}
}
void Main()
{
var list = new List<Foo>();
//before C# 6.0
string barCSharp5 = list.DefaultIfEmpty(new Foo()).FirstOrDefault().Bar;
//C# 6.0 or later
var barCS...
in_array multiple values
...precisely equal to the targets:
$haystack = array(...);
$target = array('foo', 'bar');
if(count(array_intersect($haystack, $target)) == count($target)){
// all of $target is in $haystack
}
Note that you only need to verify the size of the resulting intersection is the same size as the array...
Deploy a project using Git push
...f .git happens to be in the same naming scheme as working directory. i.e. /foo/bar (working directory) and /foo/bar.git (barebone git repository). So make sure you rename /foo/bar to something else, such as /foo/bar.live or /foo/blah Well, in case you are wondering, the exact error message you woul...