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Showing empty view when ListView is empty
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It should be like this:
<TextView android:id="@android:id/empty"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="No Results" />
Note the id attribute.
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Rails 3: “field-with-errors” wrapper changes the page appearance. How to avoid this?
...ionView::Base:
@@field_error_proc = Proc.new{ |html_tag, instance|
"<div class=\"field_with_errors\">#{html_tag}</div>".html_safe
}
You can override it by putting this in your application's class inside config/application.rb:
config.action_view.field_error_proc = Proc.new { |ht...
jQuery Data vs Attr?
...o a DOM element from the server, you should set the data on the element:
<a id="foo" data-foo="bar" href="#">foo!</a>
The data can then be accessed using .data() in jQuery:
console.log( $('#foo').data('foo') );
//outputs "bar"
However when you store data on a DOM node in jQuery usi...
How to get the type of T from a member of a generic class or method?
... and that the list could be any type at runtime)
If you know it is a List<T>, then:
Type type = abc.GetType().GetGenericArguments()[0];
Another option is to look at the indexer:
Type type = abc.GetType().GetProperty("Item").PropertyType;
Using new TypeInfo:
using System.Reflection;
// ...
What does enctype='multipart/form-data' mean?
What does enctype='multipart/form-data' mean in an HTML form and when should we use it?
9 Answers
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How to pass argument to Makefile from command line?
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don't try to do this
$ make action value1 value2
instead create script:
#! /bin/sh
# rebuild if necessary
make
# do action with arguments
action "$@"
and do this:
$ ./buildthenaction.sh value1 value2
for more explanation why do this and caveats of makefile hackery read my answer to ...
C/C++ check if one bit is set in, i.e. int variable
...lation, you can write a macro:
#define CHECK_BIT(var,pos) ((var) & (1<<(pos)))
and use it this way to check the nth bit from the right end:
CHECK_BIT(temp, n - 1)
In C++, you can use std::bitset.
share
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In log4j, does checking isDebugEnabled before logging improve performance?
...ion of the toString() methods of various objects and concatenating the results.
In the given example, the log message is a constant string, so letting the logger discard it is just as efficient as checking whether the logger is enabled, and it lowers the complexity of the code because there are few...
How to use the IEqualityComparer
...t required. AsEnumerable is also redundant here since processing the result in AddRange will cause this anyway.
1 Writing code without knowing what it actually does is called cargo cult programming. It’s a surprisingly widespread practice. It fundamentally doesn’t work.
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width:auto for fields
...r a display:block element meant 'fill available space'. However for an <input> element this doesn't seem to be the case. For example:
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