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Detect if an input has text in it using CSS — on a page I am visiting and do not control?
...ty when any character (even a space) is entered.
Example:
<style>
#foo { background: yellow; }
#foo:valid { outline: solid blue 2px; }
#foo:invalid { outline: solid red 2px; }
</style>
<input id=foo required>
The pseudo-classed :valid and :invalid are defined in Working Draft l...
How can I negate the return-value of a process?
...
The negation works on the whole pipe, so you can't do ldd foo.exe | ! grep badlib but you can do ! ldd foo.exe | grep badlib if you want the exit status to be 0 if badlib is not found in foo.exe. Semantically you want to invert the grep status, but inverting the entire pipe gives t...
How do I get the number of elements in a list?
...
1. __foo__: this is just a convention, a way for the Python system to use names that won't conflict with user names. 2. _foo: this is just a convention, a way for the programmer to indicate that the variable is private (whatever ...
How to set environment variables in Python?
...) # Check an existing env. variable
True
>>> os.environ.has_key('FOO') # Check for a non existing variable
False
>>> os.environ['FOO'] = '1' # Set a new env. variable (String value)
>>> os.environ.has_key('FOO')
True
>>> os.environ.get('FOO') # Retrie...
How to call multiple JavaScript functions in onclick event?
...ry
$("#id").bind("click", function() {
alert("Event 1");
});
$(".foo").bind("click", function() {
alert("Foo class");
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="foo" id="id">Click</div>
...
Expression Versus Statement
...If I'm not mis-interpreting you here, you seem to claim that "(setf (third foo) 'goose)" is an expression, not a statement, both because it's Lisp, which "doesn't have statements," and because Lisp is more than a decade older than C, which was the "earliest popular language to blur the lines [betwee...
XML parsing of a variable string in JavaScript
...Name() to get the nodes you want.
Example usage:
var xml = parseXml("<foo>Stuff</foo>");
alert(xml.documentElement.nodeName);
If you're using jQuery, from version 1.5 you can use its built-in parseXML() method, which is functionally identical to the function above.
var xml = $.parse...
Iterate over model instance field names and values in template
...ms.models import model_to_dict
def show(request, object_id):
object = FooForm(data=model_to_dict(Foo.objects.get(pk=object_id)))
return render_to_response('foo/foo_detail.html', {'object': object})
in the template add:
{% for field in object %}
<li><b>{{ field.label }}:&l...
Java: convert List to a String
...se the new String.join() method:
List<String> list = Arrays.asList("foo", "bar", "baz");
String joined = String.join(" and ", list); // "foo and bar and baz"
If you have a Collection with another type than String you can use the Stream API with the joining Collector:
List<Person> lis...
How to tell a Mockito mock object to return something different the next time it is called?
...t as a static variable on the class level like so... In one test, I want Foo.someMethod() to return a certain value, while in another test, I want it to return a different value. The problem I'm having is that it seems I need to rebuild the mocks to get this to work correctly. I'd like to avoid...