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Determine the data types of a data frame's columns
... 5
@Gavin Simpson's approach is also streamlined, but provides slightly different information than class():
sapply(my.data, typeof)
y x1 x2 X3
"double" "integer" "logical" "integer"
For more information about class, typeof, and the middle child, mode, see this exc...
Are unused CSS images downloaded?
...
I'm assuming that you've tested on Windows? If you'd like to add cross-platform comparisons then I can offer that Firefox 3.6.x and Chrome 5.0.307.11 (Ubuntu 9.10) also don't. =)
– David says reinstate Monica
Mar 7 '10 at 16:22
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filters on ng-model in an input
...t automatically trims string, so it does not detect that model was changed if you add spaces at the end or at start (so spaces are not automatically removed by my code). But in 1.1.1 there is 'ng-trim' directive that allows to disable this functionality (commit). So I've decided to use 1.1.1 to achi...
Is there any advantage of using map over unordered_map in case of trivial keys?
...h simple types -- I took a look at the interfaces, and didn't find any significant differences that would impact my code.
...
How to get first element in a list of tuples?
...of tuple objects, not a list of sets (as your original question implied). If it is actually a list of sets, then there is no first element because sets have no order.
Here I've created a flat list because generally that seems more useful than creating a list of 1 element tuples. However, you can ...
java.lang.IllegalArgumentException: View not attached to window manager
...Override
protected void onPostExecute(MyResult result) {
try {
if ((this.mDialog != null) && this.mDialog.isShowing()) {
this.mDialog.dismiss();
}
} catch (final IllegalArgumentException e) {
// Handle or log or ignore
} catch (final Exception ...
ExecuteReader requires an open and available Connection. The connection's current state is Connectin
...Connection-Pool:
In practice, most applications use only one or a few different
configurations for connections. This means that during application
execution, many identical connections will be repeatedly opened and
closed. To minimize the cost of opening connections, ADO.NET uses an
opti...
Why is there no tuple comprehension in Python?
...n is just syntactic sugar to use a generator expression that outputs a specific type. list(i for i in (1, 2, 3)) is a generator expression that outputs a list, set(i for i in (1, 2, 3)) outputs a set. Does that mean the comprehension syntax is not needed? Perhaps not, but it is awfully handy. For th...
INSERT with SELECT
...the parenthesis aren't required around field names. But when you start specifying values on top of the select, apparently you need () around the field names.
– Kyle
Mar 22 '11 at 12:53
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What is a ViewModelLocator and what are its pros/cons compared to DataTemplates?
...ViewModels) we use when our application actually runs, but instructing it differently when running the unit tests for the application. In the latter case the application will not even have a UI (it's not running; just the tests are) so the container will resolve mocks in place of the "normal" types ...