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When should I use the HashSet type?
I am exploring the HashSet<T> type, but I don't understand where it stands in collections.
11 Answers
...
The new keyword “auto”; When should it be used to declare a variable type? [duplicate]
...refore, can be used extensively, but in the latter case, it reduces readabilty and hence shouldn't be used.
Another place where auto can be used is when you use new1 or make_* functions , such as here:
//without auto. Not that good, looks cumbersome
SomeType<OtherType>::SomeOtherType * obj...
Django optional url parameters
... approaches.
One is to use a non-capturing group in the regex: (?:/(?P<title>[a-zA-Z]+)/)?
Making a Regex Django URL Token Optional
Another, easier to follow way is to have multiple rules that matches your needs, all pointing to the same view.
urlpatterns = patterns('',
url(r'^projec...
Vertically centering a div inside another div [duplicate]
... example
Tested in:
FF3.5+
FF4+
Safari 5+
Chrome 11+
IE9+
HTML
<div class="cn"><div class="inner">your content</div></div>
CSS
.cn {
display: table-cell;
width: 500px;
height: 500px;
vertical-align: middle;
text-align: center;
}
.inner {
display: in...
Spring 3 RequestMapping: Get path value
... foo( @PathVariable String id, HttpServletRequest request ) {
String urlTail = new AntPathMatcher()
.extractPathWithinPattern( "/{id}/**", request.getRequestURI() );
}
share
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impro...
Android - custom UI with custom attributes
...and new to define some specific behavior I am not able to handle with default propertis or attributes)
3 Answers
...
Weighted random numbers
...ght
Pseudo-code illustrating this:
int sum_of_weight = 0;
for(int i=0; i<num_choices; i++) {
sum_of_weight += choice_weight[i];
}
int rnd = random(sum_of_weight);
for(int i=0; i<num_choices; i++) {
if(rnd < choice_weight[i])
return i;
rnd -= choice_weight[i];
}
assert(!"should ...
ruby on rails f.select options with custom attributes
... had it right in the code in your question. Using html5 data-attributes:
<%= f.select :country_id, options_for_select(
@countries.map{ |c| [c.name, c.id, {'data-currency_code'=>c.currency_code}] }) %>
Adding an initial selection:
<%= f.select :country_id, options_for_select(
...
POST unchecked HTML checkboxes
I've got a load of checkboxes that are checked by default. My users will probably uncheck a few (if any) of the checkboxes and leave the rest checked.
...
How to make a countdown timer in Android?
...h() {
mTextField.setText("done!");
}
}.start();
It will result in memory leak of the instance of the activity where you use this code, if you don't carefully clean up the references.
use the following code
//Declare timer
CountDownTimer cTimer = null;
//start timer function
void st...