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JavaScript: empty array, [ ] evaluates to true in conditional structures. Why is this?
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From http://www.sitepoint.com/javascript-truthy-falsy/
The following values are always falsy:
false
0 (zero)
"" (empty string)
null
undefined
NaN (a special Number value meaning Not-a-Number!)
All other values are truthy, including "0" (zero in q...
Selecting multiple classes with jQuery
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Al right, I got this one stackoverflow.com/q/1041344/148271. basically I will have to join all the selector for intersection. Like $(".myClass.myOtherClass")
– IsmailS
Sep 2 '11 at 13:03
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Adding a user to a group in django
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docs.djangoproject.com/en/dev/intro/tutorial01 There are similar examples in section 'Playing with the API'
– juankysmith
Sep 1 '11 at 17:02
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XML Validation with XSD in Visual Studio IDE
...for me. I am guessing my system was just hosed, but I have moved to a new computer and everything works fine now.
– Jim McKeeth
Oct 21 '10 at 21:19
38
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Put buttons at bottom of screen with LinearLayout?
...coding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/db1_root"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1...
How do I automatically sort a has_many relationship in Rails?
...on on has_many itself:
class Article < ActiveRecord::Base
has_many :comments, :order => 'created_at DESC'
end
class Comment < ActiveRecord::Base
belongs_to :article
end
Or, if you want a simple, non-database method of sorting, use sort_by:
article.comments.sort_by &:created_...
How to Test a Concern in Rails
... do
it_behaves_like "personable"
end
The advantages of this approach become even more obvious when you start doing things in your concern like invoking AR callbacks, where anything less than an AR object just won't do.
s...
How to disable/enable select field using jQuery?
.../select>
pizza.
</form>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script>
var update_pizza = function () {
if ($("#pizza").is(":checked")) {
$('#pizza_kind').prop('disabled', false);
}
else {
$...
How to enable CORS in AngularJs
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Not in the space available in a comment. It's rather a big set of topics.
– Quentin
May 23 '14 at 8:31
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How can I limit a “Run Script” build phase to my release configuration?
...riable, you need to surround the variable in quotes. So ${CONFIGURATION} becomes "${CONFIGURATION}". I'll update the answer to include that.
– Jason Coco
Mar 3 '11 at 20:30
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