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Factors in R: more than an annoyance?
... factors easily with droplevels() to drop unused factor levels for an individual factor or for every factor in a data.frame (since R 2.12):
x <- subset(iris, Species == 'setosa')
levels(x$Species)
# [1] "setosa" "versicolor" "virginica"
x <- droplevels(x)
levels(x$Species)
# [1] "setosa"...
Will Dart support the use of existing JavaScript libraries?
... JavaScript, and I read the Dart Language Spec on Libraries, although I didn't see an answer there. Also a search on their discussion form for the word 'existing' turns up 3 results that are not related.
...
Are there disadvantages to using a generic varchar(255) for all text-based fields?
...ap String fields to VARCHAR(255) by default and I never bothered to override it).
7 Answers
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Is it possible to have two partial classes in different assemblies represent the same class?
...view of the different flavours of MVC, MVP and whatnot: you'll find design ideas aplenty. I suppose you could also use Dependency Injection to tell the UI what kind of controls are viable for individual entities and attributes.
Your aim of separating concerns is great; but partial classes were int...
How can I use an array of function pointers?
...a, int b);
int div(int a, int b);
int (*p[4]) (int x, int y);
int main(void)
{
int result;
int i, j, op;
p[0] = sum; /* address of sum() */
p[1] = subtract; /* address of subtract() */
p[2] = mul; /* address of mul() */
p[3] = div; /* address of div() */
[...]
To call one of those f...
Adding additional data to select options using jQuery
...
HTML Markup
<select id="select">
<option value="1" data-foo="dogs">this</option>
<option value="2" data-foo="cats">that</option>
<option value="3" data-foo="gerbils">other</option>
</select>
C...
Why can't C compilers rearrange struct members to eliminate alignment padding? [duplicate]
Consider the following example on a 32 bit x86 machine:
11 Answers
11
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Why does google.load cause my page to go blank?
...le-ajax-search-api/browse_thread/thread/e07c2606498094e6
Using one of the ideas, you could use a callback for the load to force it use append rather than doc.write:
setTimeout(function(){google.load('visualization', '1', {'callback':'alert("2 sec wait")', 'packages':['corechart']})}, 2000);
This...
java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
...
You should do the transaction in a Handler as follows:
@Override
protected void onPostExecute(String result) {
Log.v("MyFragmentActivity", "onFriendAddedAsyncTask/onPostExecute");
new Handler().post(new Runnable() {
public void run() {
fm = getSuppor...
Creating email templates with Django
...on me but why do we use txt and htmly both at the same time for a mail. I didnt get this logic
– Shashank Vivek
Feb 21 '16 at 9:16
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